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-rw-r--r--Documentation/driver-api/device_connection.rst43
-rw-r--r--Documentation/driver-api/driver-model/devres.rst1
-rw-r--r--Documentation/driver-api/firmware/fallback-mechanisms.rst1
-rw-r--r--Documentation/driver-api/index.rst1
-rw-r--r--Documentation/filesystems/sysfs.rst8
-rw-r--r--MAINTAINERS6
-rw-r--r--drivers/base/Makefile2
-rw-r--r--drivers/base/arch_topology.c2
-rw-r--r--drivers/base/bus.c2
-rw-r--r--drivers/base/cacheinfo.c49
-rw-r--r--drivers/base/class.c2
-rw-r--r--drivers/base/core.c63
-rw-r--r--drivers/base/cpu.c84
-rw-r--r--drivers/base/dd.c8
-rw-r--r--drivers/base/devcon.c231
-rw-r--r--drivers/base/devcoredump.c2
-rw-r--r--drivers/base/devres.c105
-rw-r--r--drivers/base/firmware_loader/fallback.c4
-rw-r--r--drivers/base/memory.c62
-rw-r--r--drivers/base/node.c306
-rw-r--r--drivers/base/platform.c37
-rw-r--r--drivers/base/power/sysfs.c160
-rw-r--r--drivers/base/power/wakeup_stats.c17
-rw-r--r--drivers/base/property.c73
-rw-r--r--drivers/base/soc.c64
-rw-r--r--drivers/base/syscore.c8
-rw-r--r--drivers/base/topology.c10
-rw-r--r--drivers/hwmon/pmbus/pmbus_core.c28
-rw-r--r--drivers/iio/adc/xilinx-xadc-core.c16
-rw-r--r--drivers/usb/roles/class.c12
-rw-r--r--drivers/usb/typec/mux.c19
-rw-r--r--fs/sysfs/file.c55
-rw-r--r--include/linux/device.h58
-rw-r--r--include/linux/hugetlb.h4
-rw-r--r--include/linux/property.h14
-rw-r--r--include/linux/sysfs.h15
-rw-r--r--lib/devres.c20
-rw-r--r--lib/dynamic_debug.c27
-rw-r--r--mm/hugetlb.c18
-rwxr-xr-xscripts/dev-needs.sh315
40 files changed, 1135 insertions, 817 deletions
diff --git a/Documentation/driver-api/device_connection.rst b/Documentation/driver-api/device_connection.rst
deleted file mode 100644
index ba364224c349..000000000000
--- a/Documentation/driver-api/device_connection.rst
+++ /dev/null
@@ -1,43 +0,0 @@
-==================
-Device connections
-==================
-
-Introduction
-------------
-
-Devices often have connections to other devices that are outside of the direct
-child/parent relationship. A serial or network communication controller, which
-could be a PCI device, may need to be able to get a reference to its PHY
-component, which could be attached for example to the I2C bus. Some device
-drivers need to be able to control the clocks or the GPIOs for their devices,
-and so on.
-
-Device connections are generic descriptions of any type of connection between
-two separate devices.
-
-Device connections alone do not create a dependency between the two devices.
-They are only descriptions which are not tied to either of the devices directly.
-A dependency between the two devices exists only if one of the two endpoint
-devices requests a reference to the other. The descriptions themselves can be
-defined in firmware (not yet supported) or they can be built-in.
-
-Usage
------
-
-Device connections should exist before device ``->probe`` callback is called for
-either endpoint device in the description. If the connections are defined in
-firmware, this is not a problem. It should be considered if the connection
-descriptions are "built-in", and need to be added separately.
-
-The connection description consists of the names of the two devices with the
-connection, i.e. the endpoints, and unique identifier for the connection which
-is needed if there are multiple connections between the two devices.
-
-After a description exists, the devices in it can request reference to the other
-endpoint device, or they can request the description itself.
-
-API
----
-
-.. kernel-doc:: drivers/base/devcon.c
- :functions: device_connection_find_match device_connection_find device_connection_add device_connection_remove
diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst
index eaaaafc21134..f318a5c0033c 100644
--- a/Documentation/driver-api/driver-model/devres.rst
+++ b/Documentation/driver-api/driver-model/devres.rst
@@ -354,6 +354,7 @@ MEM
devm_kmalloc()
devm_kmalloc_array()
devm_kmemdup()
+ devm_krealloc()
devm_kstrdup()
devm_kvasprintf()
devm_kzalloc()
diff --git a/Documentation/driver-api/firmware/fallback-mechanisms.rst b/Documentation/driver-api/firmware/fallback-mechanisms.rst
index 036383dad6d6..5f04c3bcdf0c 100644
--- a/Documentation/driver-api/firmware/fallback-mechanisms.rst
+++ b/Documentation/driver-api/firmware/fallback-mechanisms.rst
@@ -42,6 +42,7 @@ fallback mechanism:
supported for request_firmware_into_buf().
* Firmware is not accessible through typical means:
+
* It cannot be installed into the root filesystem
* The firmware provides very unique device specific data tailored for
the unit gathered with local information. An example is calibration
diff --git a/Documentation/driver-api/index.rst b/Documentation/driver-api/index.rst
index 5ef2cfe3a16b..6e7c702e0268 100644
--- a/Documentation/driver-api/index.rst
+++ b/Documentation/driver-api/index.rst
@@ -22,7 +22,6 @@ available subsections can be seen below.
pm/index
clk
device-io
- device_connection
dma-buf
device_link
component
diff --git a/Documentation/filesystems/sysfs.rst b/Documentation/filesystems/sysfs.rst
index 5a3209a4cebf..004d490179f3 100644
--- a/Documentation/filesystems/sysfs.rst
+++ b/Documentation/filesystems/sysfs.rst
@@ -241,12 +241,10 @@ Other notes:
is 4096.
- show() methods should return the number of bytes printed into the
- buffer. This is the return value of scnprintf().
+ buffer.
-- show() must not use snprintf() when formatting the value to be
- returned to user space. If you can guarantee that an overflow
- will never happen you can use sprintf() otherwise you must use
- scnprintf().
+- show() should only use sysfs_emit() or sysfs_emit_at() when formatting
+ the value to be returned to user space.
- store() should return the number of bytes used from the buffer. If the
entire buffer has been used, just return the count argument.
diff --git a/MAINTAINERS b/MAINTAINERS
index 385bd1258bf8..1658837035a3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5023,6 +5023,12 @@ S: Maintained
F: drivers/base/devcoredump.c
F: include/linux/devcoredump.h
+DEVICE DEPENDENCY HELPER SCRIPT
+M: Saravana Kannan <saravanak@google.com>
+L: linux-kernel@vger.kernel.org
+S: Maintained
+F: scripts/dev-needs.sh
+
DEVICE DIRECT ACCESS (DAX)
M: Dan Williams <dan.j.williams@intel.com>
M: Vishal Verma <vishal.l.verma@intel.com>
diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index 157452080f3d..41369fc7004f 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -6,7 +6,7 @@ obj-y := component.o core.o bus.o dd.o syscore.o \
cpu.o firmware.o init.o map.o devres.o \
attribute_container.o transport_class.o \
topology.o container.o property.o cacheinfo.o \
- devcon.o swnode.o
+ swnode.o
obj-$(CONFIG_DEVTMPFS) += devtmpfs.o
obj-y += power/
obj-$(CONFIG_ISA_BUS_API) += isa.o
diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
index c1a9e2fb634e..de8587cc119e 100644
--- a/drivers/base/arch_topology.c
+++ b/drivers/base/arch_topology.c
@@ -80,7 +80,7 @@ static ssize_t cpu_capacity_show(struct device *dev,
{
struct cpu *cpu = container_of(dev, struct cpu, dev);
- return sprintf(buf, "%lu\n", topology_get_cpu_scale(cpu->dev.id));
+ return sysfs_emit(buf, "%lu\n", topology_get_cpu_scale(cpu->dev.id));
}
static void update_topology_flags_workfn(struct work_struct *work);
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 886e9054999a..a9c23ecebc7c 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -229,7 +229,7 @@ static DRIVER_ATTR_IGNORE_LOCKDEP(bind, S_IWUSR, NULL, bind_store);
static ssize_t drivers_autoprobe_show(struct bus_type *bus, char *buf)
{
- return sprintf(buf, "%d\n", bus->p->drivers_autoprobe);
+ return sysfs_emit(buf, "%d\n", bus->p->drivers_autoprobe);
}
static ssize_t drivers_autoprobe_store(struct bus_type *bus,
diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c
index 8d553c92cd32..bfc095956dd1 100644
--- a/drivers/base/cacheinfo.c
+++ b/drivers/base/cacheinfo.c
@@ -362,7 +362,7 @@ static ssize_t file_name##_show(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct cacheinfo *this_leaf = dev_get_drvdata(dev); \
- return sprintf(buf, "%u\n", this_leaf->object); \
+ return sysfs_emit(buf, "%u\n", this_leaf->object); \
}
show_one(id, id);
@@ -377,44 +377,48 @@ static ssize_t size_show(struct device *dev,
{
struct cacheinfo *this_leaf = dev_get_drvdata(dev);
- return sprintf(buf, "%uK\n", this_leaf->size >> 10);
+ return sysfs_emit(buf, "%uK\n", this_leaf->size >> 10);
}
-static ssize_t shared_cpumap_show_func(struct device *dev, bool list, char *buf)
+static ssize_t shared_cpu_map_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
struct cacheinfo *this_leaf = dev_get_drvdata(dev);
const struct cpumask *mask = &this_leaf->shared_cpu_map;
- return cpumap_print_to_pagebuf(list, buf, mask);
-}
-
-static ssize_t shared_cpu_map_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return shared_cpumap_show_func(dev, false, buf);
+ return sysfs_emit(buf, "%*pb\n", nr_cpu_ids, mask);
}
static ssize_t shared_cpu_list_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return shared_cpumap_show_func(dev, true, buf);
+ struct cacheinfo *this_leaf = dev_get_drvdata(dev);
+ const struct cpumask *mask = &this_leaf->shared_cpu_map;
+
+ return sysfs_emit(buf, "%*pbl\n", nr_cpu_ids, mask);
}
static ssize_t type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct cacheinfo *this_leaf = dev_get_drvdata(dev);
+ const char *output;
switch (this_leaf->type) {
case CACHE_TYPE_DATA:
- return sprintf(buf, "Data\n");
+ output = "Data";
+ break;
case CACHE_TYPE_INST:
- return sprintf(buf, "Instruction\n");
+ output = "Instruction";
+ break;
case CACHE_TYPE_UNIFIED:
- return sprintf(buf, "Unified\n");
+ output = "Unified";
+ break;
default:
return -EINVAL;
}
+
+ return sysfs_emit(buf, "%s\n", output);
}
static ssize_t allocation_policy_show(struct device *dev,
@@ -422,15 +426,18 @@ static ssize_t allocation_policy_show(struct device *dev,
{
struct cacheinfo *this_leaf = dev_get_drvdata(dev);
unsigned int ci_attr = this_leaf->attributes;
- int n = 0;
+ const char *output;
if ((ci_attr & CACHE_READ_ALLOCATE) && (ci_attr & CACHE_WRITE_ALLOCATE))
- n = sprintf(buf, "ReadWriteAllocate\n");
+ output = "ReadWriteAllocate";
else if (ci_attr & CACHE_READ_ALLOCATE)
- n = sprintf(buf, "ReadAllocate\n");
+ output = "ReadAllocate";
else if (ci_attr & CACHE_WRITE_ALLOCATE)
- n = sprintf(buf, "WriteAllocate\n");
- return n;
+ output = "WriteAllocate";
+ else
+ return 0;
+
+ return sysfs_emit(buf, "%s\n", output);
}
static ssize_t write_policy_show(struct device *dev,
@@ -441,9 +448,9 @@ static ssize_t write_policy_show(struct device *dev,
int n = 0;
if (ci_attr & CACHE_WRITE_THROUGH)
- n = sprintf(buf, "WriteThrough\n");
+ n = sysfs_emit(buf, "WriteThrough\n");
else if (ci_attr & CACHE_WRITE_BACK)
- n = sprintf(buf, "WriteBack\n");
+ n = sysfs_emit(buf, "WriteBack\n");
return n;
}
diff --git a/drivers/base/class.c b/drivers/base/class.c
index bcd410e6d70a..c3451481194e 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -478,7 +478,7 @@ ssize_t show_class_attr_string(struct class *class,
struct class_attribute_string *cs;
cs = container_of(attr, struct class_attribute_string, attr);
- return snprintf(buf, PAGE_SIZE, "%s\n", cs->str);
+ return sysfs_emit(buf, "%s\n", cs->str);
}
EXPORT_SYMBOL_GPL(show_class_attr_string);
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 0bad9e6066c3..3b9404921da9 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -26,6 +26,7 @@
#include <linux/pm_runtime.h>
#include <linux/netdevice.h>
#include <linux/sched/signal.h>
+#include <linux/sched/mm.h>
#include <linux/sysfs.h>
#include "base.h"
@@ -239,27 +240,35 @@ void device_pm_move_to_tail(struct device *dev)
#define to_devlink(dev) container_of((dev), struct device_link, link_dev)
static ssize_t status_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+ struct device_attribute *attr, char *buf)
{
- char *status;
+ const char *output;
switch (to_devlink(dev)->status) {
case DL_STATE_NONE:
- status = "not tracked"; break;
+ output = "not tracked";
+ break;
case DL_STATE_DORMANT:
- status = "dormant"; break;
+ output = "dormant";
+ break;
case DL_STATE_AVAILABLE:
- status = "available"; break;
+ output = "available";
+ break;
case DL_STATE_CONSUMER_PROBE:
- status = "consumer probing"; break;
+ output = "consumer probing";
+ break;
case DL_STATE_ACTIVE:
- status = "active"; break;
+ output = "active";
+ break;
case DL_STATE_SUPPLIER_UNBIND:
- status = "supplier unbinding"; break;
+ output = "supplier unbinding";
+ break;
default:
- status = "unknown"; break;
+ output = "unknown";
+ break;
}
- return sprintf(buf, "%s\n", status);
+
+ return sysfs_emit(buf, "%s\n", output);
}
static DEVICE_ATTR_RO(status);
@@ -267,16 +276,16 @@ static ssize_t auto_remove_on_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct device_link *link = to_devlink(dev);
- char *str;
+ const char *output;
if (link->flags & DL_FLAG_AUTOREMOVE_SUPPLIER)
- str = "supplier unbind";
+ output = "supplier unbind";
else if (link->flags & DL_FLAG_AUTOREMOVE_CONSUMER)
- str = "consumer unbind";
+ output = "consumer unbind";
else
- str = "never";
+ output = "never";
- return sprintf(buf, "%s\n", str);
+ return sysfs_emit(buf, "%s\n", output);
}
static DEVICE_ATTR_RO(auto_remove_on);
@@ -285,7 +294,7 @@ static ssize_t runtime_pm_show(struct device *dev,
{
struct device_link *link = to_devlink(dev);
- return sprintf(buf, "%d\n", !!(link->flags & DL_FLAG_PM_RUNTIME));
+ return sysfs_emit(buf, "%d\n", !!(link->flags & DL_FLAG_PM_RUNTIME));
}
static DEVICE_ATTR_RO(runtime_pm);
@@ -294,7 +303,8 @@ static ssize_t sync_state_only_show(struct device *dev,
{
struct device_link *link = to_devlink(dev);
- return sprintf(buf, "%d\n", !!(link->flags & DL_FLAG_SYNC_STATE_ONLY));
+ return sysfs_emit(buf, "%d\n",
+ !!(link->flags & DL_FLAG_SYNC_STATE_ONLY));
}
static DEVICE_ATTR_RO(sync_state_only);
@@ -1059,7 +1069,7 @@ static ssize_t waiting_for_supplier_show(struct device *dev,
&& dev->links.need_for_probe;
mutex_unlock(&wfs_lock);
device_unlock(dev);
- return sprintf(buf, "%u\n", val);
+ return sysfs_emit(buf, "%u\n", val);
}
static DEVICE_ATTR_RO(waiting_for_supplier);
@@ -1709,7 +1719,7 @@ ssize_t device_show_ulong(struct device *dev,
char *buf)
{
struct dev_ext_attribute *ea = to_ext_attr(attr);
- return snprintf(buf, PAGE_SIZE, "%lx\n", *(unsigned long *)(ea->var));
+ return sysfs_emit(buf, "%lx\n", *(unsigned long *)(ea->var));
}
EXPORT_SYMBOL_GPL(device_show_ulong);
@@ -1739,7 +1749,7 @@ ssize_t device_show_int(struct device *dev,
{
struct dev_ext_attribute *ea = to_ext_attr(attr);
- return snprintf(buf, PAGE_SIZE, "%d\n", *(int *)(ea->var));
+ return sysfs_emit(buf, "%d\n", *(int *)(ea->var));
}
EXPORT_SYMBOL_GPL(device_show_int);
@@ -1760,7 +1770,7 @@ ssize_t device_show_bool(struct device *dev, struct device_attribute *attr,
{
struct dev_ext_attribute *ea = to_ext_attr(attr);
- return snprintf(buf, PAGE_SIZE, "%d\n", *(bool *)(ea->var));
+ return sysfs_emit(buf, "%d\n", *(bool *)(ea->var));
}
EXPORT_SYMBOL_GPL(device_show_bool);
@@ -1932,7 +1942,7 @@ static ssize_t uevent_show(struct device *dev, struct device_attribute *attr,
struct kset *kset;
struct kobj_uevent_env *env = NULL;
int i;
- size_t count = 0;
+ int len = 0;
int retval;
/* search the kset, the device belongs to */
@@ -1962,10 +1972,10 @@ static ssize_t uevent_show(struct device *dev, struct device_attribute *attr,
/* copy keys to file */
for (i = 0; i < env->envp_idx; i++)
- count += sprintf(&buf[count], "%s\n", env->envp[i]);
+ len += sysfs_emit_at(buf, len, "%s\n", env->envp[i]);
out:
kfree(env);
- return count;
+ return len;
}
static ssize_t uevent_store(struct device *dev, struct device_attribute *attr,
@@ -1992,7 +2002,7 @@ static ssize_t online_show(struct device *dev, struct device_attribute *attr,
device_lock(dev);
val = !dev->offline;
device_unlock(dev);
- return sprintf(buf, "%u\n", val);
+ return sysfs_emit(buf, "%u\n", val);
}
static ssize_t online_store(struct device *dev, struct device_attribute *attr,
@@ -3062,6 +3072,7 @@ void device_del(struct device *dev)
struct device *parent = dev->parent;
struct kobject *glue_dir = NULL;
struct class_interface *class_intf;
+ unsigned int noio_flag;
device_lock(dev);
kill_device(dev);
@@ -3073,6 +3084,7 @@ void device_del(struct device *dev)
/* Notify clients of device removal. This call must come
* before dpm_sysfs_remove().
*/
+ noio_flag = memalloc_noio_save();
if (dev->bus)
blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_DEL_DEVICE, dev);
@@ -3114,6 +3126,7 @@ void device_del(struct device *dev)
glue_dir = get_glue_dir(dev);
kobject_del(&dev->kobj);
cleanup_glue_dir(dev, glue_dir);
+ memalloc_noio_restore(noio_flag);
put_device(parent);
}
EXPORT_SYMBOL_GPL(device_del);
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index d2136ab9b14a..8f1d6569564c 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -139,11 +139,11 @@ EXPORT_SYMBOL_GPL(cpu_subsys);
#ifdef CONFIG_KEXEC
#include <linux/kexec.h>
-static ssize_t show_crash_notes(struct device *dev, struct device_attribute *attr,
+static ssize_t crash_notes_show(struct device *dev,
+ struct device_attribute *attr,
char *buf)
{
struct cpu *cpu = container_of(dev, struct cpu, dev);
- ssize_t rc;
unsigned long long addr;
int cpunum;
@@ -156,21 +156,18 @@ static ssize_t show_crash_notes(struct device *dev, struct device_attribute *att
* operation should be safe. No locking required.
*/
addr = per_cpu_ptr_to_phys(per_cpu_ptr(crash_notes, cpunum));
- rc = sprintf(buf, "%Lx\n", addr);
- return rc;
+
+ return sysfs_emit(buf, "%llx\n", addr);
}
-static DEVICE_ATTR(crash_notes, 0400, show_crash_notes, NULL);
+static DEVICE_ATTR_ADMIN_RO(crash_notes);
-static ssize_t show_crash_notes_size(struct device *dev,
+static ssize_t crash_notes_size_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- ssize_t rc;
-
- rc = sprintf(buf, "%zu\n", sizeof(note_buf_t));
- return rc;
+ return sysfs_emit(buf, "%zu\n", sizeof(note_buf_t));
}
-static DEVICE_ATTR(crash_notes_size, 0400, show_crash_notes_size, NULL);
+static DEVICE_ATTR_ADMIN_RO(crash_notes_size);
static struct attribute *crash_note_cpu_attrs[] = {
&dev_attr_crash_notes.attr,
@@ -231,7 +228,7 @@ static struct cpu_attr cpu_attrs[] = {
static ssize_t print_cpus_kernel_max(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "%d\n", NR_CPUS - 1);
+ return sysfs_emit(buf, "%d\n", NR_CPUS - 1);
}
static DEVICE_ATTR(kernel_max, 0444, print_cpus_kernel_max, NULL);
@@ -241,37 +238,37 @@ unsigned int total_cpus;
static ssize_t print_cpus_offline(struct device *dev,
struct device_attribute *attr, char *buf)
{
- int n = 0, len = PAGE_SIZE-2;
+ int len = 0;
cpumask_var_t offline;
/* display offline cpus < nr_cpu_ids */
if (!alloc_cpumask_var(&offline, GFP_KERNEL))
return -ENOMEM;
cpumask_andnot(offline, cpu_possible_mask, cpu_online_mask);
- n = scnprintf(buf, len, "%*pbl", cpumask_pr_args(offline));
+ len += sysfs_emit_at(buf, len, "%*pbl", cpumask_pr_args(offline));
free_cpumask_var(offline);
/* display offline cpus >= nr_cpu_ids */
if (total_cpus && nr_cpu_ids < total_cpus) {
- if (n && n < len)
- buf[n++] = ',';
+ len += sysfs_emit_at(buf, len, ",");
if (nr_cpu_ids == total_cpus-1)
- n += scnprintf(&buf[n], len - n, "%u", nr_cpu_ids);
+ len += sysfs_emit_at(buf, len, "%u", nr_cpu_ids);
else
- n += scnprintf(&buf[n], len - n, "%u-%d",
- nr_cpu_ids, total_cpus-1);
+ len += sysfs_emit_at(buf, len, "%u-%d",
+ nr_cpu_ids, total_cpus - 1);
}
- n += scnprintf(&buf[n], len - n, "\n");
- return n;
+ len += sysfs_emit_at(buf, len, "\n");
+
+ return len;
}
static DEVICE_ATTR(offline, 0444, print_cpus_offline, NULL);
static ssize_t print_cpus_isolated(struct device *dev,
struct device_attribute *attr, char *buf)
{
- int n;
+ int len;
cpumask_var_t isolated;
if (!alloc_cpumask_var(&isolated, GFP_KERNEL))
@@ -279,19 +276,19 @@ static ssize_t print_cpus_isolated(struct device *dev,
cpumask_andnot(isolated, cpu_possible_mask,
housekeeping_cpumask(HK_FLAG_DOMAIN));
- n = sprintf(buf, "%*pbl\n", cpumask_pr_args(isolated));
+ len = sysfs_emit(buf, "%*pbl\n", cpumask_pr_args(isolated));
free_cpumask_var(isolated);
- return n;
+ return len;
}
static DEVICE_ATTR(isolated, 0444, print_cpus_isolated, NULL);
#ifdef CONFIG_NO_HZ_FULL
static ssize_t print_cpus_nohz_full(struct device *dev,
- struct device_attribute *attr, char *buf)
+ struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "%*pbl\n", cpumask_pr_args(tick_nohz_full_mask));
+ return sysfs_emit(buf, "%*pbl\n", cpumask_pr_args(tick_nohz_full_mask));
}
static DEVICE_ATTR(nohz_full, 0444, print_cpus_nohz_full, NULL);
#endif
@@ -320,22 +317,23 @@ static ssize_t print_cpu_modalias(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- ssize_t n;
+ int len = 0;
u32 i;
- n = sprintf(buf, "cpu:type:" CPU_FEATURE_TYPEFMT ":feature:",
- CPU_FEATURE_TYPEVAL);
+ len += sysfs_emit_at(buf, len,
+ "cpu:type:" CPU_FEATURE_TYPEFMT ":feature:",
+ CPU_FEATURE_TYPEVAL);
for (i = 0; i < MAX_CPU_FEATURES; i++)
if (cpu_have_feature(i)) {
- if (PAGE_SIZE < n + sizeof(",XXXX\n")) {
+ if (len + sizeof(",XXXX\n") >= PAGE_SIZE) {
WARN(1, "CPU features overflow page\n");
break;
}
- n += sprintf(&buf[n], ",%04X", i);
+ len += sysfs_emit_at(buf, len, ",%04X", i);
}
- buf[n++] = '\n';
- return n;
+ len += sysfs_emit_at(buf, len, "\n");
+ return len;
}
static int cpu_uevent(struct device *dev, struct kobj_uevent_env *env)
@@ -516,56 +514,56 @@ static void __init cpu_dev_register_generic(void)
ssize_t __weak cpu_show_meltdown(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}
ssize_t __weak cpu_show_spectre_v1(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}
ssize_t __weak cpu_show_spectre_v2(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}
ssize_t __weak cpu_show_spec_store_bypass(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}
ssize_t __weak cpu_show_l1tf(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}
ssize_t __weak cpu_show_mds(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}
ssize_t __weak cpu_show_tsx_async_abort(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}
ssize_t __weak cpu_show_itlb_multihit(struct device *dev,
- struct device_attribute *attr, char *buf)
+ struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}
ssize_t __weak cpu_show_srbds(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}
static DEVICE_ATTR(meltdown, 0444, cpu_show_meltdown, NULL);
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 857b0a928e8d..b52d69eb4e71 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -486,7 +486,8 @@ static ssize_t state_synced_show(struct device *dev,
device_lock(dev);
val = dev->state_synced;
device_unlock(dev);
- return sprintf(buf, "%u\n", val);
+
+ return sysfs_emit(buf, "%u\n", val);
}
static DEVICE_ATTR_RO(state_synced);
@@ -658,15 +659,14 @@ done:
*/
static int really_probe_debug(struct device *dev, struct device_driver *drv)
{
- ktime_t calltime, delta, rettime;
+ ktime_t calltime, rettime;
int ret;
calltime = ktime_get();
ret = really_probe(dev, drv);
rettime = ktime_get();
- delta = ktime_sub(rettime, calltime);
pr_debug("probe of %s returned %d after %lld usecs\n",
- dev_name(dev), ret, (s64) ktime_to_us(delta));
+ dev_name(dev), ret, ktime_us_delta(rettime, calltime));
return ret;
}
diff --git a/drivers/base/devcon.c b/drivers/base/devcon.c
deleted file mode 100644
index 14e2178e09f8..000000000000
--- a/drivers/base/devcon.c
+++ /dev/null
@@ -1,231 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/**
- * Device connections
- *
- * Copyright (C) 2018 Intel Corporation
- * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
- */
-
-#include <linux/device.h>
-#include <linux/property.h>
-
-static DEFINE_MUTEX(devcon_lock);
-static LIST_HEAD(devcon_list);
-
-static void *
-fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
- void *data, devcon_match_fn_t match)
-{
- struct device_connection con = { .id = con_id };
- struct fwnode_handle *ep;
- void *ret;
-
- fwnode_graph_for_each_endpoint(fwnode, ep) {
- con.fwnode = fwnode_graph_get_remote_port_parent(ep);
- if (!fwnode_device_is_available(con.fwnode))
- continue;
-
- ret = match(&con, -1, data);
- fwnode_handle_put(con.fwnode);
- if (ret) {
- fwnode_handle_put(ep);
- return ret;
- }
- }
- return NULL;
-}
-
-static void *
-fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
- void *data, devcon_match_fn_t match)
-{
- struct device_connection con = { };
- void *ret;
- int i;
-
- for (i = 0; ; i++) {
- con.fwnode = fwnode_find_reference(fwnode, con_id, i);
- if (IS_ERR(con.fwnode))
- break;
-
- ret = match(&con, -1, data);
- fwnode_handle_put(con.fwnode);
- if (ret)
- return ret;
- }
-
- return NULL;
-}
-
-/**
- * fwnode_connection_find_match - Find connection from a device node
- * @fwnode: Device node with the connection
- * @con_id: Identifier for the connection
- * @data: Data for the match function
- * @match: Function to check and convert the connection description
- *
- * Find a connection with unique identifier @con_id between @fwnode and another
- * device node. @match will be used to convert the connection description to
- * data the caller is expecting to be returned.
- */
-void *fwnode_connection_find_match(struct fwnode_handle *fwnode,
- const char *con_id, void *data,
- devcon_match_fn_t match)
-{
- void *ret;
-
- if (!fwnode || !match)
- return NULL;
-
- ret = fwnode_graph_devcon_match(fwnode, con_id, data, match);
- if (ret)
- return ret;
-
- return fwnode_devcon_match(fwnode, con_id, data, match);
-}
-EXPORT_SYMBOL_GPL(fwnode_connection_find_match);
-
-/**
- * device_connection_find_match - Find physical connection to a device
- * @dev: Device with the connection
- * @con_id: Identifier for the connection
- * @data: Data for the match function
- * @match: Function to check and convert the connection description
- *
- * Find a connection with unique identifier @con_id between @dev and another
- * device. @match will be used to convert the connection description to data the
- * caller is expecting to be returned.
- */
-void *device_connection_find_match(struct device *dev, const char *con_id,
- void *data, devcon_match_fn_t match)
-{
- struct fwnode_handle *fwnode = dev_fwnode(dev);
- const char *devname = dev_name(dev);
- struct device_connection *con;
- void *ret = NULL;
- int ep;
-
- if (!match)
- return NULL;
-
- ret = fwnode_connection_find_match(fwnode, con_id, data, match);
- if (ret)
- return ret;
-
- mutex_lock(&devcon_lock);
-
- list_for_each_entry(con, &devcon_list, list) {
- ep = match_string(con->endpoint, 2, devname);
- if (ep < 0)
- continue;
-
- if (con_id && strcmp(con->id, con_id))
- continue;
-
- ret = match(con, !ep, data);
- if (ret)
- break;
- }
-
- mutex_unlock(&devcon_lock);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(device_connection_find_match);
-
-extern struct bus_type platform_bus_type;
-extern struct bus_type pci_bus_type;
-extern struct bus_type i2c_bus_type;
-extern struct bus_type spi_bus_type;
-
-static struct bus_type *generic_match_buses[] = {
- &platform_bus_type,
-#ifdef CONFIG_PCI
- &pci_bus_type,
-#endif
-#ifdef CONFIG_I2C
- &i2c_bus_type,
-#endif
-#ifdef CONFIG_SPI_MASTER
- &spi_bus_type,
-#endif
- NULL,
-};
-
-static void *device_connection_fwnode_match(struct device_connection *con)
-{
- struct bus_type *bus;
- struct device *dev;
-
- for (bus = generic_match_buses[0]; bus; bus++) {
- dev = bus_find_device_by_fwnode(bus, con->fwnode);
- if (dev && !strncmp(dev_name(dev), con->id, strlen(con->id)))
- return dev;
-
- put_device(dev);
- }
- return NULL;
-}
-
-/* This tries to find the device from the most common bus types by name. */
-static void *generic_match(struct device_connection *con, int ep, void *data)
-{
- struct bus_type *bus;
- struct device *dev;
-
- if (con->fwnode)
- return device_connection_fwnode_match(con);
-
- for (bus = generic_match_buses[0]; bus; bus++) {
- dev = bus_find_device_by_name(bus, NULL, con->endpoint[ep]);
- if (dev)
- return dev;
- }
-
- /*
- * We only get called if a connection was found, tell the caller to
- * wait for the other device to show up.
- */
- return ERR_PTR(-EPROBE_DEFER);
-}
-
-/**
- * device_connection_find - Find two devices connected together
- * @dev: Device with the connection
- * @con_id: Identifier for the connection
- *
- * Find a connection with unique identifier @con_id between @dev and
- * another device. On success returns handle to the device that is connected
- * to @dev, with the reference count for the found device incremented. Returns
- * NULL if no matching connection was found, or ERR_PTR(-EPROBE_DEFER) when a
- * connection was found but the other device has not been enumerated yet.
- */
-struct device *device_connection_find(struct device *dev, const char *con_id)
-{
- return device_connection_find_match(dev, con_id, NULL, generic_match);
-}
-EXPORT_SYMBOL_GPL(device_connection_find);
-
-/**
- * device_connection_add - Register a connection description
- * @con: The connection description to be registered
- */
-void device_connection_add(struct device_connection *con)
-{
- mutex_lock(&devcon_lock);
- list_add_tail(&con->list, &devcon_list);
- mutex_unlock(&devcon_lock);
-}
-EXPORT_SYMBOL_GPL(device_connection_add);
-
-/**
- * device_connections_remove - Unregister connection description
- * @con: The connection description to be unregistered
- */
-void device_connection_remove(struct device_connection *con)
-{
- mutex_lock(&devcon_lock);
- list_del(&con->list);
- mutex_unlock(&devcon_lock);
-}
-EXPORT_SYMBOL_GPL(device_connection_remove);
diff --git a/drivers/base/devcoredump.c b/drivers/base/devcoredump.c
index e42d0b514384..9243468e2c99 100644
--- a/drivers/base/devcoredump.c
+++ b/drivers/base/devcoredump.c
@@ -123,7 +123,7 @@ static int devcd_free(struct device *dev, void *data)
static ssize_t disabled_show(struct class *class, struct class_attribute *attr,
char *buf)
{
- return sprintf(buf, "%d\n", devcd_disabled);
+ return sysfs_emit(buf, "%d\n", devcd_disabled);
}
static ssize_t disabled_store(struct class *class, struct class_attribute *attr,
diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index ed615d3b9cf1..586e9a75c840 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -126,6 +126,14 @@ static void add_dr(struct device *dev, struct devres_node *node)
list_add_tail(&node->entry, &dev->devres_head);
}
+static void replace_dr(struct device *dev,
+ struct devres_node *old, struct devres_node *new)
+{
+ devres_log(dev, old, "REPLACE");
+ BUG_ON(!list_empty(&new->entry));
+ list_replace(&old->entry, &new->entry);
+}
+
#ifdef CONFIG_DEBUG_DEVRES
void * __devres_alloc_node(dr_release_t release, size_t size, gfp_t gfp, int nid,
const char *name)
@@ -838,6 +846,103 @@ void *devm_kmalloc(struct device *dev, size_t size, gfp_t gfp)
EXPORT_SYMBOL_GPL(devm_kmalloc);
/**
+ * devm_krealloc - Resource-managed krealloc()
+ * @dev: Device to re-allocate memory for
+ * @ptr: Pointer to the memory chunk to re-allocate
+ * @new_size: New allocation size
+ * @gfp: Allocation gfp flags
+ *
+ * Managed krealloc(). Resizes the memory chunk allocated with devm_kmalloc().
+ * Behaves similarly to regular krealloc(): if @ptr is NULL or ZERO_SIZE_PTR,
+ * it's the equivalent of devm_kmalloc(). If new_size is zero, it frees the
+ * previously allocated memory and returns ZERO_SIZE_PTR. This function doesn't
+ * change the order in which the release callback for the re-alloc'ed devres
+ * will be called (except when falling back to devm_kmalloc() or when freeing
+ * resources when new_size is zero). The contents of the memory are preserved
+ * up to the lesser of new and old sizes.
+ */
+void *devm_krealloc(struct device *dev, void *ptr, size_t new_size, gfp_t gfp)
+{
+ size_t total_new_size, total_old_size;
+ struct devres *old_dr, *new_dr;
+ unsigned long flags;
+
+ if (unlikely(!new_size)) {
+ devm_kfree(dev, ptr);
+ return ZERO_SIZE_PTR;
+ }
+
+ if (unlikely(ZERO_OR_NULL_PTR(ptr)))
+ return devm_kmalloc(dev, new_size, gfp);
+
+ if (WARN_ON(is_kernel_rodata((unsigned long)ptr)))
+ /*
+ * We cannot reliably realloc a const string returned by
+ * devm_kstrdup_const().
+ */
+ return NULL;
+
+ if (!check_dr_size(new_size, &total_new_size))
+ return NULL;
+
+ total_old_size = ksize(container_of(ptr, struct devres, data));
+ if (total_old_size == 0) {
+ WARN(1, "Pointer doesn't point to dynamically allocated memory.");
+ return NULL;
+ }
+
+ /*
+ * If new size is smaller or equal to the actual number of bytes
+ * allocated previously - just return the same pointer.
+ */
+ if (total_new_size <= total_old_size)
+ return ptr;
+
+ /*
+ * Otherwise: allocate new, larger chunk. We need to allocate before
+ * taking the lock as most probably the caller uses GFP_KERNEL.
+ */
+ new_dr = alloc_dr(devm_kmalloc_release,
+ total_new_size, gfp, dev_to_node(dev));
+ if (!new_dr)
+ return NULL;
+
+ /*
+ * The spinlock protects the linked list against concurrent
+ * modifications but not the resource itself.
+ */
+ spin_lock_irqsave(&dev->devres_lock, flags);
+
+ old_dr = find_dr(dev, devm_kmalloc_release, devm_kmalloc_match, ptr);
+ if (!old_dr) {
+ spin_unlock_irqrestore(&dev->devres_lock, flags);
+ kfree(new_dr);
+ WARN(1, "Memory chunk not managed or managed by a different device.");
+ return NULL;
+ }
+
+ replace_dr(dev, &old_dr->node, &new_dr->node);
+
+ spin_unlock_irqrestore(&dev->devres_lock, flags);
+
+ /*
+ * We can copy the memory contents after releasing the lock as we're
+ * no longer modyfing the list links.
+ */
+ memcpy(new_dr->data, old_dr->data,
+ total_old_size - offsetof(struct devres, data));
+ /*
+ * Same for releasing the old devres - it's now been removed from the
+ * list. This is also the reason why we must not use devm_kfree() - the
+ * links are no longer valid.
+ */
+ kfree(old_dr);
+
+ return new_dr->data;
+}
+EXPORT_SYMBOL_GPL(devm_krealloc);
+
+/**
* devm_kstrdup - Allocate resource managed space and
* copy an existing string into that.
* @dev: Device to allocate memory for
diff --git a/drivers/base/firmware_loader/fallback.c b/drivers/base/firmware_loader/fallback.c
index 283ca2de76d4..d60e6d8c967c 100644
--- a/drivers/base/firmware_loader/fallback.c
+++ b/drivers/base/firmware_loader/fallback.c
@@ -124,7 +124,7 @@ void kill_pending_fw_fallback_reqs(bool only_kill_custom)
static ssize_t timeout_show(struct class *class, struct class_attribute *attr,
char *buf)
{
- return sprintf(buf, "%d\n", __firmware_loading_timeout());
+ return sysfs_emit(buf, "%d\n", __firmware_loading_timeout());
}
/**
@@ -219,7 +219,7 @@ static ssize_t firmware_loading_show(struct device *dev,
loading = fw_sysfs_loading(fw_sysfs->fw_priv);
mutex_unlock(&fw_lock);
- return sprintf(buf, "%d\n", loading);
+ return sysfs_emit(buf, "%d\n", loading);
}
/**
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 4db3c660de83..adf828dfccf0 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -119,7 +119,8 @@ static ssize_t phys_index_show(struct device *dev,
unsigned long phys_index;
phys_index = mem->start_section_nr / sections_per_block;
- return sprintf(buf, "%08lx\n", phys_index);
+
+ return sysfs_emit(buf, "%08lx\n", phys_index);
}
/*
@@ -129,7 +130,7 @@ static ssize_t phys_index_show(struct device *dev,
static ssize_t removable_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- return sprintf(buf, "%d\n", (int)IS_ENABLED(CONFIG_MEMORY_HOTREMOVE));
+ return sysfs_emit(buf, "%d\n", (int)IS_ENABLED(CONFIG_MEMORY_HOTREMOVE));
}
/*
@@ -139,7 +140,7 @@ static ssize_t state_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct memory_block *mem = to_memory_block(dev);
- ssize_t len = 0;
+ const char *output;
/*
* We can probably put these states in a nice little array
@@ -147,22 +148,20 @@ static ssize_t state_show(struct device *dev, struct device_attribute *attr,
*/
switch (mem->state) {
case MEM_ONLINE:
- len = sprintf(buf, "online\n");
+ output = "online";
break;
case MEM_OFFLINE:
- len = sprintf(buf, "offline\n");
+ output = "offline";
break;
case MEM_GOING_OFFLINE:
- len = sprintf(buf, "going-offline\n");
+ output = "going-offline";
break;
default:
- len = sprintf(buf, "ERROR-UNKNOWN-%ld\n",
- mem->state);
WARN_ON(1);
- break;
+ return sysfs_emit(buf, "ERROR-UNKNOWN-%ld\n", mem->state);
}
- return len;
+ return sysfs_emit(buf, "%s\n", output);
}
int memory_notify(unsigned long val, void *v)
@@ -303,21 +302,22 @@ static ssize_t phys_device_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct memory_block *mem = to_memory_block(dev);
- return sprintf(buf, "%d\n", mem->phys_device);
+
+ return sysfs_emit(buf, "%d\n", mem->phys_device);
}
#ifdef CONFIG_MEMORY_HOTREMOVE
-static void print_allowed_zone(char *buf, int nid, unsigned long start_pfn,
- unsigned long nr_pages, int online_type,
- struct zone *default_zone)
+static int print_allowed_zone(char *buf, int len, int nid,
+ unsigned long start_pfn, unsigned long nr_pages,
+ int online_type, struct zone *default_zone)
{
struct zone *zone;
zone = zone_for_pfn_range(online_type, nid, start_pfn, nr_pages);
- if (zone != default_zone) {
- strcat(buf, " ");
- strcat(buf, zone->name);
- }
+ if (zone == default_zone)
+ return 0;
+
+ return sysfs_emit_at(buf, len, " %s", zone->name);
}
static ssize_t valid_zones_show(struct device *dev,
@@ -327,6 +327,7 @@ static ssize_t valid_zones_show(struct device *dev,
unsigned long start_pfn = section_nr_to_pfn(mem->start_section_nr);
unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
struct zone *default_zone;
+ int len = 0;
int nid;
/*
@@ -341,24 +342,23 @@ static ssize_t valid_zones_show(struct device *dev,
default_zone = test_pages_in_a_zone(start_pfn,
start_pfn + nr_pages);
if (!default_zone)
- return sprintf(buf, "none\n");
- strcat(buf, default_zone->name);
+ return sysfs_emit(buf, "%s\n", "none");
+ len += sysfs_emit_at(buf, len, "%s", default_zone->name);
goto out;
}
nid = mem->nid;
default_zone = zone_for_pfn_range(MMOP_ONLINE, nid, start_pfn,
nr_pages);
- strcat(buf, default_zone->name);
- print_allowed_zone(buf, nid, start_pfn, nr_pages, MMOP_ONLINE_KERNEL,
- default_zone);
- print_allowed_zone(buf, nid, start_pfn, nr_pages, MMOP_ONLINE_MOVABLE,
- default_zone);
+ len += sysfs_emit_at(buf, len, "%s", default_zone->name);
+ len += print_allowed_zone(buf, len, nid, start_pfn, nr_pages,
+ MMOP_ONLINE_KERNEL, default_zone);
+ len += print_allowed_zone(buf, len, nid, start_pfn, nr_pages,
+ MMOP_ONLINE_MOVABLE, default_zone);
out:
- strcat(buf, "\n");
-
- return strlen(buf);
+ len += sysfs_emit_at(buf, len, "\n");
+ return len;
}
static DEVICE_ATTR_RO(valid_zones);
#endif
@@ -374,7 +374,7 @@ static DEVICE_ATTR_RO(removable);
static ssize_t block_size_bytes_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "%lx\n", memory_block_size_bytes());
+ return sysfs_emit(buf, "%lx\n", memory_block_size_bytes());
}
static DEVICE_ATTR_RO(block_size_bytes);
@@ -386,8 +386,8 @@ static DEVICE_ATTR_RO(block_size_bytes);
static ssize_t auto_online_blocks_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "%s\n",
- online_type_to_str[memhp_default_online_type]);
+ return sysfs_emit(buf, "%s\n",
+ online_type_to_str[memhp_default_online_type]);
}
static ssize_t auto_online_blocks_store(struct device *dev,
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 5ca6f8905db2..43d21f9e88b1 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -46,19 +46,23 @@ static ssize_t node_read_cpumap(struct device *dev, bool list, char *buf)
return n;
}
-static inline ssize_t node_read_cpumask(struct device *dev,
- struct device_attribute *attr, char *buf)
+static inline ssize_t cpumap_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
return node_read_cpumap(dev, false, buf);
}
-static inline ssize_t node_read_cpulist(struct device *dev,
- struct device_attribute *attr, char *buf)
+
+static DEVICE_ATTR_RO(cpumap);
+
+static inline ssize_t cpulist_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
return node_read_cpumap(dev, true, buf);
}
-static DEVICE_ATTR(cpumap, S_IRUGO, node_read_cpumask, NULL);
-static DEVICE_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL);
+static DEVICE_ATTR_RO(cpulist);
/**
* struct node_access_nodes - Access class device to hold user visible
@@ -153,19 +157,20 @@ free:
}
#ifdef CONFIG_HMEM_REPORTING
-#define ACCESS_ATTR(name) \
-static ssize_t name##_show(struct device *dev, \
- struct device_attribute *attr, \
- char *buf) \
-{ \
- return sprintf(buf, "%u\n", to_access_nodes(dev)->hmem_attrs.name); \
-} \
-static DEVICE_ATTR_RO(name);
-
-ACCESS_ATTR(read_bandwidth)
-ACCESS_ATTR(read_latency)
-ACCESS_ATTR(write_bandwidth)
-ACCESS_ATTR(write_latency)
+#define ACCESS_ATTR(name) \
+static ssize_t name##_show(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return sysfs_emit(buf, "%u\n", \
+ to_access_nodes(dev)->hmem_attrs.name); \
+} \
+static DEVICE_ATTR_RO(name)
+
+ACCESS_ATTR(read_bandwidth);
+ACCESS_ATTR(read_latency);
+ACCESS_ATTR(write_bandwidth);
+ACCESS_ATTR(write_latency);
static struct attribute *access_attrs[] = {
&dev_attr_read_bandwidth.attr,
@@ -225,7 +230,8 @@ static ssize_t name##_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
- return sprintf(buf, fmt "\n", to_cache_info(dev)->cache_attrs.name);\
+ return sysfs_emit(buf, fmt "\n", \
+ to_cache_info(dev)->cache_attrs.name); \
} \
DEVICE_ATTR_RO(name);
@@ -361,7 +367,7 @@ static void node_remove_caches(struct node *node) { }
static ssize_t node_read_meminfo(struct device *dev,
struct device_attribute *attr, char *buf)
{
- int n;
+ int len = 0;
int nid = dev->id;
struct pglist_data *pgdat = NODE_DATA(nid);
struct sysinfo i;
@@ -370,128 +376,128 @@ static ssize_t node_read_meminfo(struct device *dev,
si_meminfo_node(&i, nid);
sreclaimable = node_page_state_pages(pgdat, NR_SLAB_RECLAIMABLE_B);
sunreclaimable = node_page_state_pages(pgdat, NR_SLAB_UNRECLAIMABLE_B);
- n = sprintf(buf,
- "Node %d MemTotal: %8lu kB\n"
- "Node %d MemFree: %8lu kB\n"
- "Node %d MemUsed: %8lu kB\n"
- "Node %d Active: %8lu kB\n"
- "Node %d Inactive: %8lu kB\n"
- "Node %d Active(anon): %8lu kB\n"
- "Node %d Inactive(anon): %8lu kB\n"
- "Node %d Active(file): %8lu kB\n"
- "Node %d Inactive(file): %8lu kB\n"
- "Node %d Unevictable: %8lu kB\n"
- "Node %d Mlocked: %8lu kB\n",
- nid, K(i.totalram),
- nid, K(i.freeram),
- nid, K(i.totalram - i.freeram),
- nid, K(node_page_state(pgdat, NR_ACTIVE_ANON) +
- node_page_state(pgdat, NR_ACTIVE_FILE)),
- nid, K(node_page_state(pgdat, NR_INACTIVE_ANON) +
- node_page_state(pgdat, NR_INACTIVE_FILE)),
- nid, K(node_page_state(pgdat, NR_ACTIVE_ANON)),
- nid, K(node_page_state(pgdat, NR_INACTIVE_ANON)),
- nid, K(node_page_state(pgdat, NR_ACTIVE_FILE)),
- nid, K(node_page_state(pgdat, NR_INACTIVE_FILE)),
- nid, K(node_page_state(pgdat, NR_UNEVICTABLE)),
- nid, K(sum_zone_node_page_state(nid, NR_MLOCK)));
+ len = sysfs_emit_at(buf, len,
+ "Node %d MemTotal: %8lu kB\n"
+ "Node %d MemFree: %8lu kB\n"
+ "Node %d MemUsed: %8lu kB\n"
+ "Node %d Active: %8lu kB\n"
+ "Node %d Inactive: %8lu kB\n"
+ "Node %d Active(anon): %8lu kB\n"
+ "Node %d Inactive(anon): %8lu kB\n"
+ "Node %d Active(file): %8lu kB\n"
+ "Node %d Inactive(file): %8lu kB\n"
+ "Node %d Unevictable: %8lu kB\n"
+ "Node %d Mlocked: %8lu kB\n",
+ nid, K(i.totalram),
+ nid, K(i.freeram),
+ nid, K(i.totalram - i.freeram),
+ nid, K(node_page_state(pgdat, NR_ACTIVE_ANON) +
+ node_page_state(pgdat, NR_ACTIVE_FILE)),
+ nid, K(node_page_state(pgdat, NR_INACTIVE_ANON) +
+ node_page_state(pgdat, NR_INACTIVE_FILE)),
+ nid, K(node_page_state(pgdat, NR_ACTIVE_ANON)),
+ nid, K(node_page_state(pgdat, NR_INACTIVE_ANON)),
+ nid, K(node_page_state(pgdat, NR_ACTIVE_FILE)),
+ nid, K(node_page_state(pgdat, NR_INACTIVE_FILE)),
+ nid, K(node_page_state(pgdat, NR_UNEVICTABLE)),
+ nid, K(sum_zone_node_page_state(nid, NR_MLOCK)));
#ifdef CONFIG_HIGHMEM
- n += sprintf(buf + n,
- "Node %d HighTotal: %8lu kB\n"
- "Node %d HighFree: %8lu kB\n"
- "Node %d LowTotal: %8lu kB\n"
- "Node %d LowFree: %8lu kB\n",
- nid, K(i.totalhigh),
- nid, K(i.freehigh),
- nid, K(i.totalram - i.totalhigh),
- nid, K(i.freeram - i.freehigh));
+ len += sysfs_emit_at(buf, len,
+ "Node %d HighTotal: %8lu kB\n"
+ "Node %d HighFree: %8lu kB\n"
+ "Node %d LowTotal: %8lu kB\n"
+ "Node %d LowFree: %8lu kB\n",
+ nid, K(i.totalhigh),
+ nid, K(i.freehigh),
+ nid, K(i.totalram - i.totalhigh),
+ nid, K(i.freeram - i.freehigh));
#endif
- n += sprintf(buf + n,
- "Node %d Dirty: %8lu kB\n"
- "Node %d Writeback: %8lu kB\n"
- "Node %d FilePages: %8lu kB\n"
- "Node %d Mapped: %8lu kB\n"
- "Node %d AnonPages: %8lu kB\n"
- "Node %d Shmem: %8lu kB\n"
- "Node %d KernelStack: %8lu kB\n"
+ len += sysfs_emit_at(buf, len,
+ "Node %d Dirty: %8lu kB\n"
+ "Node %d Writeback: %8lu kB\n"
+ "Node %d FilePages: %8lu kB\n"
+ "Node %d Mapped: %8lu kB\n"
+ "Node %d AnonPages: %8lu kB\n"
+ "Node %d Shmem: %8lu kB\n"
+ "Node %d KernelStack: %8lu kB\n"
#ifdef CONFIG_SHADOW_CALL_STACK
- "Node %d ShadowCallStack:%8lu kB\n"
+ "Node %d ShadowCallStack:%8lu kB\n"
#endif
- "Node %d PageTables: %8lu kB\n"
- "Node %d NFS_Unstable: %8lu kB\n"
- "Node %d Bounce: %8lu kB\n"
- "Node %d WritebackTmp: %8lu kB\n"
- "Node %d KReclaimable: %8lu kB\n"
- "Node %d Slab: %8lu kB\n"
- "Node %d SReclaimable: %8lu kB\n"
- "Node %d SUnreclaim: %8lu kB\n"
+ "Node %d PageTables: %8lu kB\n"
+ "Node %d NFS_Unstable: %8lu kB\n"
+ "Node %d Bounce: %8lu kB\n"
+ "Node %d WritebackTmp: %8lu kB\n"
+ "Node %d KReclaimable: %8lu kB\n"
+ "Node %d Slab: %8lu kB\n"
+ "Node %d SReclaimable: %8lu kB\n"
+ "Node %d SUnreclaim: %8lu kB\n"
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- "Node %d AnonHugePages: %8lu kB\n"
- "Node %d ShmemHugePages: %8lu kB\n"
- "Node %d ShmemPmdMapped: %8lu kB\n"
- "Node %d FileHugePages: %8lu kB\n"
- "Node %d FilePmdMapped: %8lu kB\n"
+ "Node %d AnonHugePages: %8lu kB\n"
+ "Node %d ShmemHugePages: %8lu kB\n"
+ "Node %d ShmemPmdMapped: %8lu kB\n"
+ "Node %d FileHugePages: %8lu kB\n"
+ "Node %d FilePmdMapped: %8lu kB\n"
#endif
- ,
- nid, K(node_page_state(pgdat, NR_FILE_DIRTY)),
- nid, K(node_page_state(pgdat, NR_WRITEBACK)),
- nid, K(node_page_state(pgdat, NR_FILE_PAGES)),
- nid, K(node_page_state(pgdat, NR_FILE_MAPPED)),
- nid, K(node_page_state(pgdat, NR_ANON_MAPPED)),
- nid, K(i.sharedram),
- nid, node_page_state(pgdat, NR_KERNEL_STACK_KB),
+ ,
+ nid, K(node_page_state(pgdat, NR_FILE_DIRTY)),
+ nid, K(node_page_state(pgdat, NR_WRITEBACK)),
+ nid, K(node_page_state(pgdat, NR_FILE_PAGES)),
+ nid, K(node_page_state(pgdat, NR_FILE_MAPPED)),
+ nid, K(node_page_state(pgdat, NR_ANON_MAPPED)),
+ nid, K(i.sharedram),
+ nid, node_page_state(pgdat, NR_KERNEL_STACK_KB),
#ifdef CONFIG_SHADOW_CALL_STACK
- nid, node_page_state(pgdat, NR_KERNEL_SCS_KB),
+ nid, node_page_state(pgdat, NR_KERNEL_SCS_KB),
#endif
- nid, K(sum_zone_node_page_state(nid, NR_PAGETABLE)),
- nid, 0UL,
- nid, K(sum_zone_node_page_state(nid, NR_BOUNCE)),
- nid, K(node_page_state(pgdat, NR_WRITEBACK_TEMP)),
- nid, K(sreclaimable +
- node_page_state(pgdat, NR_KERNEL_MISC_RECLAIMABLE)),
- nid, K(sreclaimable + sunreclaimable),
- nid, K(sreclaimable),
- nid, K(sunreclaimable)
+ nid, K(sum_zone_node_page_state(nid, NR_PAGETABLE)),
+ nid, 0UL,
+ nid, K(sum_zone_node_page_state(nid, NR_BOUNCE)),
+ nid, K(node_page_state(pgdat, NR_WRITEBACK_TEMP)),
+ nid, K(sreclaimable +
+ node_page_state(pgdat, NR_KERNEL_MISC_RECLAIMABLE)),
+ nid, K(sreclaimable + sunreclaimable),
+ nid, K(sreclaimable),
+ nid, K(sunreclaimable)
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- ,
- nid, K(node_page_state(pgdat, NR_ANON_THPS) *
- HPAGE_PMD_NR),
- nid, K(node_page_state(pgdat, NR_SHMEM_THPS) *
- HPAGE_PMD_NR),
- nid, K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED) *
- HPAGE_PMD_NR),
- nid, K(node_page_state(pgdat, NR_FILE_THPS) *
- HPAGE_PMD_NR),
- nid, K(node_page_state(pgdat, NR_FILE_PMDMAPPED) *
- HPAGE_PMD_NR)
+ ,
+ nid, K(node_page_state(pgdat, NR_ANON_THPS) *
+ HPAGE_PMD_NR),
+ nid, K(node_page_state(pgdat, NR_SHMEM_THPS) *
+ HPAGE_PMD_NR),
+ nid, K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED) *
+ HPAGE_PMD_NR),
+ nid, K(node_page_state(pgdat, NR_FILE_THPS) *
+ HPAGE_PMD_NR),
+ nid, K(node_page_state(pgdat, NR_FILE_PMDMAPPED) *
+ HPAGE_PMD_NR)
#endif
- );
- n += hugetlb_report_node_meminfo(nid, buf + n);
- return n;
+ );
+ len += hugetlb_report_node_meminfo(buf, len, nid);
+ return len;
}
#undef K
-static DEVICE_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL);
+static DEVICE_ATTR(meminfo, 0444, node_read_meminfo, NULL);
static ssize_t node_read_numastat(struct device *dev,
- struct device_attribute *attr, char *buf)
+ struct device_attribute *attr, char *buf)
{
- return sprintf(buf,
- "numa_hit %lu\n"
- "numa_miss %lu\n"
- "numa_foreign %lu\n"
- "interleave_hit %lu\n"
- "local_node %lu\n"
- "other_node %lu\n",
- sum_zone_numa_state(dev->id, NUMA_HIT),
- sum_zone_numa_state(dev->id, NUMA_MISS),
- sum_zone_numa_state(dev->id, NUMA_FOREIGN),
- sum_zone_numa_state(dev->id, NUMA_INTERLEAVE_HIT),
- sum_zone_numa_state(dev->id, NUMA_LOCAL),
- sum_zone_numa_state(dev->id, NUMA_OTHER));
+ return sysfs_emit(buf,
+ "numa_hit %lu\n"
+ "numa_miss %lu\n"
+ "numa_foreign %lu\n"
+ "interleave_hit %lu\n"
+ "local_node %lu\n"
+ "other_node %lu\n",
+ sum_zone_numa_state(dev->id, NUMA_HIT),
+ sum_zone_numa_state(dev->id, NUMA_MISS),
+ sum_zone_numa_state(dev->id, NUMA_FOREIGN),
+ sum_zone_numa_state(dev->id, NUMA_INTERLEAVE_HIT),
+ sum_zone_numa_state(dev->id, NUMA_LOCAL),
+ sum_zone_numa_state(dev->id, NUMA_OTHER));
}
-static DEVICE_ATTR(numastat, S_IRUGO, node_read_numastat, NULL);
+static DEVICE_ATTR(numastat, 0444, node_read_numastat, NULL);
static ssize_t node_read_vmstat(struct device *dev,
struct device_attribute *attr, char *buf)
@@ -499,28 +505,31 @@ static ssize_t node_read_vmstat(struct device *dev,
int nid = dev->id;
struct pglist_data *pgdat = NODE_DATA(nid);
int i;
- int n = 0;
+ int len = 0;
for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
- n += sprintf(buf+n, "%s %lu\n", zone_stat_name(i),
- sum_zone_node_page_state(nid, i));
+ len += sysfs_emit_at(buf, len, "%s %lu\n",
+ zone_stat_name(i),
+ sum_zone_node_page_state(nid, i));
#ifdef CONFIG_NUMA
for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++)
- n += sprintf(buf+n, "%s %lu\n", numa_stat_name(i),
- sum_zone_numa_state(nid, i));
-#endif
+ len += sysfs_emit_at(buf, len, "%s %lu\n",
+ numa_stat_name(i),
+ sum_zone_numa_state(nid, i));
+#endif
for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++)
- n += sprintf(buf+n, "%s %lu\n", node_stat_name(i),
- node_page_state_pages(pgdat, i));
+ len += sysfs_emit_at(buf, len, "%s %lu\n",
+ node_stat_name(i),
+ node_page_state_pages(pgdat, i));
- return n;
+ return len;
}
-static DEVICE_ATTR(vmstat, S_IRUGO, node_read_vmstat, NULL);
+static DEVICE_ATTR(vmstat, 0444, node_read_vmstat, NULL);
static ssize_t node_read_distance(struct device *dev,
- struct device_attribute *attr, char *buf)
+ struct device_attribute *attr, char *buf)
{
int nid = dev->id;
int len = 0;
@@ -532,13 +541,15 @@ static ssize_t node_read_distance(struct device *dev,
*/
BUILD_BUG_ON(MAX_NUMNODES * 4 > PAGE_SIZE);
- for_each_online_node(i)
- len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i));
+ for_each_online_node(i) {
+ len += sysfs_emit_at(buf, len, "%s%d",
+ i ? " " : "", node_distance(nid, i));
+ }
- len += sprintf(buf + len, "\n");
+ len += sysfs_emit_at(buf, len, "\n");
return len;
}
-static DEVICE_ATTR(distance, S_IRUGO, node_read_distance, NULL);
+static DEVICE_ATTR(distance, 0444, node_read_distance, NULL);
static struct attribute *node_dev_attrs[] = {
&dev_attr_cpumap.attr,
@@ -970,17 +981,6 @@ void unregister_one_node(int nid)
* node states attributes
*/
-static ssize_t print_nodes_state(enum node_states state, char *buf)
-{
- int n;
-
- n = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
- nodemask_pr_args(&node_states[state]));
- buf[n++] = '\n';
- buf[n] = '\0';
- return n;
-}
-
struct node_attr {
struct device_attribute attr;
enum node_states state;
@@ -990,7 +990,9 @@ static ssize_t show_node_state(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct node_attr *na = container_of(attr, struct node_attr, attr);
- return print_nodes_state(na->state, buf);
+
+ return sysfs_emit(buf, "%*pbl\n",
+ nodemask_pr_args(&node_states[na->state]));
}
#define _NODE_ATTR(name, state) \
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index e5d8a0503b4f..88aef93eb4dd 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -45,6 +45,8 @@ EXPORT_SYMBOL_GPL(platform_bus);
* @dev: platform device
* @type: resource type
* @num: resource index
+ *
+ * Return: a pointer to the resource or NULL on failure.
*/
struct resource *platform_get_resource(struct platform_device *dev,
unsigned int type, unsigned int num)
@@ -70,6 +72,9 @@ EXPORT_SYMBOL_GPL(platform_get_resource);
* resource management
* @index: resource index
* @res: optional output parameter to store a pointer to the obtained resource.
+ *
+ * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code
+ * on failure.
*/
void __iomem *
devm_platform_get_and_ioremap_resource(struct platform_device *pdev,
@@ -91,6 +96,9 @@ EXPORT_SYMBOL_GPL(devm_platform_get_and_ioremap_resource);
* @pdev: platform device to use both for memory resource lookup as well as
* resource management
* @index: resource index
+ *
+ * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code
+ * on failure.
*/
void __iomem *devm_platform_ioremap_resource(struct platform_device *pdev,
unsigned int index)
@@ -106,6 +114,9 @@ EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource);
* @pdev: platform device to use both for memory resource lookup as well as
* resource management
* @index: resource index
+ *
+ * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code
+ * on failure.
*/
void __iomem *devm_platform_ioremap_resource_wc(struct platform_device *pdev,
unsigned int index)
@@ -124,6 +135,9 @@ void __iomem *devm_platform_ioremap_resource_wc(struct platform_device *pdev,
* @pdev: platform device to use both for memory resource lookup as well as
* resource management
* @name: name of the resource
+ *
+ * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code
+ * on failure.
*/
void __iomem *
devm_platform_ioremap_resource_byname(struct platform_device *pdev,
@@ -559,7 +573,7 @@ int platform_device_add(struct platform_device *pdev)
* that we remember it must be freed, and we append a suffix
* to avoid namespace collision with explicit IDs.
*/
- ret = ida_simple_get(&platform_devid_ida, 0, 0, GFP_KERNEL);
+ ret = ida_alloc(&platform_devid_ida, GFP_KERNEL);
if (ret < 0)
goto err_out;
pdev->id = ret;
@@ -600,7 +614,7 @@ int platform_device_add(struct platform_device *pdev)
failed:
if (pdev->id_auto) {
- ida_simple_remove(&platform_devid_ida, pdev->id);
+ ida_free(&platform_devid_ida, pdev->id);
pdev->id = PLATFORM_DEVID_AUTO;
}
@@ -631,7 +645,7 @@ void platform_device_del(struct platform_device *pdev)
device_del(&pdev->dev);
if (pdev->id_auto) {
- ida_simple_remove(&platform_devid_ida, pdev->id);
+ ida_free(&platform_devid_ida, pdev->id);
pdev->id = PLATFORM_DEVID_AUTO;
}
@@ -1009,10 +1023,10 @@ EXPORT_SYMBOL_GPL(platform_unregister_drivers);
* (b) sysfs attribute lets new-style coldplug recover from hotplug events
* mishandled before system is fully running: "modprobe $(cat modalias)"
*/
-static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
- char *buf)
+static ssize_t modalias_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- struct platform_device *pdev = to_platform_device(dev);
+ struct platform_device *pdev = to_platform_device(dev);
int len;
len = of_device_modalias(dev, buf, PAGE_SIZE);
@@ -1023,9 +1037,7 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
if (len != -ENODEV)
return len;
- len = snprintf(buf, PAGE_SIZE, "platform:%s\n", pdev->name);
-
- return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
+ return sysfs_emit(buf, "platform:%s\n", pdev->name);
}
static DEVICE_ATTR_RO(modalias);
@@ -1070,16 +1082,17 @@ static ssize_t driver_override_show(struct device *dev,
ssize_t len;
device_lock(dev);
- len = sprintf(buf, "%s\n", pdev->driver_override);
+ len = sysfs_emit(buf, "%s\n", pdev->driver_override);
device_unlock(dev);
+
return len;
}
static DEVICE_ATTR_RW(driver_override);
static ssize_t numa_node_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+ struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "%d\n", dev_to_node(dev));
+ return sysfs_emit(buf, "%d\n", dev_to_node(dev));
}
static DEVICE_ATTR_RO(numa_node);
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index c7b24812523c..a1474fb67db9 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -101,8 +101,8 @@ static const char ctrl_on[] = "on";
static ssize_t control_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- return sprintf(buf, "%s\n",
- dev->power.runtime_auto ? ctrl_auto : ctrl_on);
+ return sysfs_emit(buf, "%s\n",
+ dev->power.runtime_auto ? ctrl_auto : ctrl_on);
}
static ssize_t control_store(struct device * dev, struct device_attribute *attr,
@@ -122,67 +122,71 @@ static ssize_t control_store(struct device * dev, struct device_attribute *attr,
static DEVICE_ATTR_RW(control);
static ssize_t runtime_active_time_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+ struct device_attribute *attr,
+ char *buf)
{
- int ret;
u64 tmp = pm_runtime_active_time(dev);
+
do_div(tmp, NSEC_PER_MSEC);
- ret = sprintf(buf, "%llu\n", tmp);
- return ret;
+
+ return sysfs_emit(buf, "%llu\n", tmp);
}
static DEVICE_ATTR_RO(runtime_active_time);
static ssize_t runtime_suspended_time_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+ struct device_attribute *attr,
+ char *buf)
{
- int ret;
u64 tmp = pm_runtime_suspended_time(dev);
+
do_div(tmp, NSEC_PER_MSEC);
- ret = sprintf(buf, "%llu\n", tmp);
- return ret;
+
+ return sysfs_emit(buf, "%llu\n", tmp);
}
static DEVICE_ATTR_RO(runtime_suspended_time);
static ssize_t runtime_status_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+ struct device_attribute *attr, char *buf)
{
- const char *p;
+ const char *output;
if (dev->power.runtime_error) {
- p = "error\n";
+ output = "error";
} else if (dev->power.disable_depth) {
- p = "unsupported\n";
+ output = "unsupported";
} else {
switch (dev->power.runtime_status) {
case RPM_SUSPENDED:
- p = "suspended\n";
+ output = "suspended";
break;
case RPM_SUSPENDING:
- p = "suspending\n";
+ output = "suspending";
break;
case RPM_RESUMING:
- p = "resuming\n";
+ output = "resuming";
break;
case RPM_ACTIVE:
- p = "active\n";
+ output = "active";
break;
default:
return -EIO;
}
}
- return sprintf(buf, p);
+ return sysfs_emit(buf, "%s\n", output);
}
static DEVICE_ATTR_RO(runtime_status);
static ssize_t autosuspend_delay_ms_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+ struct device_attribute *attr,
+ char *buf)
{
if (!dev->power.use_autosuspend)
return -EIO;
- return sprintf(buf, "%d\n", dev->power.autosuspend_delay);
+
+ return sysfs_emit(buf, "%d\n", dev->power.autosuspend_delay);
}
static ssize_t autosuspend_delay_ms_store(struct device *dev,
@@ -211,11 +215,11 @@ static ssize_t pm_qos_resume_latency_us_show(struct device *dev,
s32 value = dev_pm_qos_requested_resume_latency(dev);
if (value == 0)
- return sprintf(buf, "n/a\n");
+ return sysfs_emit(buf, "n/a\n");
if (value == PM_QOS_RESUME_LATENCY_NO_CONSTRAINT)
value = 0;
- return sprintf(buf, "%d\n", value);
+ return sysfs_emit(buf, "%d\n", value);
}
static ssize_t pm_qos_resume_latency_us_store(struct device *dev,
@@ -255,11 +259,11 @@ static ssize_t pm_qos_latency_tolerance_us_show(struct device *dev,
s32 value = dev_pm_qos_get_user_latency_tolerance(dev);
if (value < 0)
- return sprintf(buf, "auto\n");
+ return sysfs_emit(buf, "%s\n", "auto");
if (value == PM_QOS_LATENCY_ANY)
- return sprintf(buf, "any\n");
+ return sysfs_emit(buf, "%s\n", "any");
- return sprintf(buf, "%d\n", value);
+ return sysfs_emit(buf, "%d\n", value);
}
static ssize_t pm_qos_latency_tolerance_us_store(struct device *dev,
@@ -291,8 +295,8 @@ static ssize_t pm_qos_no_power_off_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return sprintf(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev)
- & PM_QOS_FLAG_NO_POWER_OFF));
+ return sysfs_emit(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev)
+ & PM_QOS_FLAG_NO_POWER_OFF));
}
static ssize_t pm_qos_no_power_off_store(struct device *dev,
@@ -320,9 +324,9 @@ static const char _disabled[] = "disabled";
static ssize_t wakeup_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- return sprintf(buf, "%s\n", device_can_wakeup(dev)
- ? (device_may_wakeup(dev) ? _enabled : _disabled)
- : "");
+ return sysfs_emit(buf, "%s\n", device_can_wakeup(dev)
+ ? (device_may_wakeup(dev) ? _enabled : _disabled)
+ : "");
}
static ssize_t wakeup_store(struct device *dev, struct device_attribute *attr,
@@ -345,7 +349,7 @@ static DEVICE_ATTR_RW(wakeup);
static ssize_t wakeup_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- unsigned long count = 0;
+ unsigned long count;
bool enabled = false;
spin_lock_irq(&dev->power.lock);
@@ -354,7 +358,10 @@ static ssize_t wakeup_count_show(struct device *dev,
enabled = true;
}
spin_unlock_irq(&dev->power.lock);
- return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n");
+
+ if (!enabled)
+ return sysfs_emit(buf, "\n");
+ return sysfs_emit(buf, "%lu\n", count);
}
static DEVICE_ATTR_RO(wakeup_count);
@@ -363,7 +370,7 @@ static ssize_t wakeup_active_count_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- unsigned long count = 0;
+ unsigned long count;
bool enabled = false;
spin_lock_irq(&dev->power.lock);
@@ -372,7 +379,10 @@ static ssize_t wakeup_active_count_show(struct device *dev,
enabled = true;
}
spin_unlock_irq(&dev->power.lock);
- return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n");
+
+ if (!enabled)
+ return sysfs_emit(buf, "\n");
+ return sysfs_emit(buf, "%lu\n", count);
}
static DEVICE_ATTR_RO(wakeup_active_count);
@@ -381,7 +391,7 @@ static ssize_t wakeup_abort_count_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- unsigned long count = 0;
+ unsigned long count;
bool enabled = false;
spin_lock_irq(&dev->power.lock);
@@ -390,7 +400,10 @@ static ssize_t wakeup_abort_count_show(struct device *dev,
enabled = true;
}
spin_unlock_irq(&dev->power.lock);
- return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n");
+
+ if (!enabled)
+ return sysfs_emit(buf, "\n");
+ return sysfs_emit(buf, "%lu\n", count);
}
static DEVICE_ATTR_RO(wakeup_abort_count);
@@ -399,7 +412,7 @@ static ssize_t wakeup_expire_count_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- unsigned long count = 0;
+ unsigned long count;
bool enabled = false;
spin_lock_irq(&dev->power.lock);
@@ -408,7 +421,10 @@ static ssize_t wakeup_expire_count_show(struct device *dev,
enabled = true;
}
spin_unlock_irq(&dev->power.lock);
- return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n");
+
+ if (!enabled)
+ return sysfs_emit(buf, "\n");
+ return sysfs_emit(buf, "%lu\n", count);
}
static DEVICE_ATTR_RO(wakeup_expire_count);
@@ -416,7 +432,7 @@ static DEVICE_ATTR_RO(wakeup_expire_count);
static ssize_t wakeup_active_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- unsigned int active = 0;
+ unsigned int active;
bool enabled = false;
spin_lock_irq(&dev->power.lock);
@@ -425,7 +441,10 @@ static ssize_t wakeup_active_show(struct device *dev,
enabled = true;
}
spin_unlock_irq(&dev->power.lock);
- return enabled ? sprintf(buf, "%u\n", active) : sprintf(buf, "\n");
+
+ if (!enabled)
+ return sysfs_emit(buf, "\n");
+ return sysfs_emit(buf, "%u\n", active);
}
static DEVICE_ATTR_RO(wakeup_active);
@@ -434,7 +453,7 @@ static ssize_t wakeup_total_time_ms_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- s64 msec = 0;
+ s64 msec;
bool enabled = false;
spin_lock_irq(&dev->power.lock);
@@ -443,7 +462,10 @@ static ssize_t wakeup_total_time_ms_show(struct device *dev,
enabled = true;
}
spin_unlock_irq(&dev->power.lock);
- return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n");
+
+ if (!enabled)
+ return sysfs_emit(buf, "\n");
+ return sysfs_emit(buf, "%lld\n", msec);
}
static DEVICE_ATTR_RO(wakeup_total_time_ms);
@@ -451,7 +473,7 @@ static DEVICE_ATTR_RO(wakeup_total_time_ms);
static ssize_t wakeup_max_time_ms_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- s64 msec = 0;
+ s64 msec;
bool enabled = false;
spin_lock_irq(&dev->power.lock);
@@ -460,7 +482,10 @@ static ssize_t wakeup_max_time_ms_show(struct device *dev,
enabled = true;
}
spin_unlock_irq(&dev->power.lock);
- return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n");
+
+ if (!enabled)
+ return sysfs_emit(buf, "\n");
+ return sysfs_emit(buf, "%lld\n", msec);
}
static DEVICE_ATTR_RO(wakeup_max_time_ms);
@@ -469,7 +494,7 @@ static ssize_t wakeup_last_time_ms_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- s64 msec = 0;
+ s64 msec;
bool enabled = false;
spin_lock_irq(&dev->power.lock);
@@ -478,7 +503,10 @@ static ssize_t wakeup_last_time_ms_show(struct device *dev,
enabled = true;
}
spin_unlock_irq(&dev->power.lock);
- return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n");
+
+ if (!enabled)
+ return sysfs_emit(buf, "\n");
+ return sysfs_emit(buf, "%lld\n", msec);
}
static inline int dpm_sysfs_wakeup_change_owner(struct device *dev, kuid_t kuid,
@@ -496,7 +524,7 @@ static ssize_t wakeup_prevent_sleep_time_ms_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- s64 msec = 0;
+ s64 msec;
bool enabled = false;
spin_lock_irq(&dev->power.lock);
@@ -505,7 +533,10 @@ static ssize_t wakeup_prevent_sleep_time_ms_show(struct device *dev,
enabled = true;
}
spin_unlock_irq(&dev->power.lock);
- return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n");
+
+ if (!enabled)
+ return sysfs_emit(buf, "\n");
+ return sysfs_emit(buf, "%lld\n", msec);
}
static DEVICE_ATTR_RO(wakeup_prevent_sleep_time_ms);
@@ -522,7 +553,7 @@ static inline int dpm_sysfs_wakeup_change_owner(struct device *dev, kuid_t kuid,
static ssize_t runtime_usage_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "%d\n", atomic_read(&dev->power.usage_count));
+ return sysfs_emit(buf, "%d\n", atomic_read(&dev->power.usage_count));
}
static DEVICE_ATTR_RO(runtime_usage);
@@ -530,21 +561,26 @@ static ssize_t runtime_active_kids_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return sprintf(buf, "%d\n", dev->power.ignore_children ?
- 0 : atomic_read(&dev->power.child_count));
+ return sysfs_emit(buf, "%d\n", dev->power.ignore_children ?
+ 0 : atomic_read(&dev->power.child_count));
}
static DEVICE_ATTR_RO(runtime_active_kids);
static ssize_t runtime_enabled_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- if (dev->power.disable_depth && (dev->power.runtime_auto == false))
- return sprintf(buf, "disabled & forbidden\n");
- if (dev->power.disable_depth)
- return sprintf(buf, "disabled\n");
- if (dev->power.runtime_auto == false)
- return sprintf(buf, "forbidden\n");
- return sprintf(buf, "enabled\n");
+ const char *output;
+
+ if (dev->power.disable_depth && !dev->power.runtime_auto)
+ output = "disabled & forbidden";
+ else if (dev->power.disable_depth)
+ output = "disabled";
+ else if (!dev->power.runtime_auto)
+ output = "forbidden";
+ else
+ output = "enabled";
+
+ return sysfs_emit(buf, "%s\n", output);
}
static DEVICE_ATTR_RO(runtime_enabled);
@@ -552,9 +588,9 @@ static DEVICE_ATTR_RO(runtime_enabled);
static ssize_t async_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- return sprintf(buf, "%s\n",
- device_async_suspend_enabled(dev) ?
- _enabled : _disabled);
+ return sysfs_emit(buf, "%s\n",
+ device_async_suspend_enabled(dev) ?
+ _enabled : _disabled);
}
static ssize_t async_store(struct device *dev, struct device_attribute *attr,
diff --git a/drivers/base/power/wakeup_stats.c b/drivers/base/power/wakeup_stats.c
index c7734914d914..d638259b829a 100644
--- a/drivers/base/power/wakeup_stats.c
+++ b/drivers/base/power/wakeup_stats.c
@@ -26,7 +26,7 @@ static ssize_t _name##_show(struct device *dev, \
{ \
struct wakeup_source *ws = dev_get_drvdata(dev); \
\
- return sprintf(buf, "%lu\n", ws->_name); \
+ return sysfs_emit(buf, "%lu\n", ws->_name); \
} \
static DEVICE_ATTR_RO(_name)
@@ -42,7 +42,7 @@ static ssize_t active_time_ms_show(struct device *dev,
ktime_t active_time =
ws->active ? ktime_sub(ktime_get(), ws->last_time) : 0;
- return sprintf(buf, "%lld\n", ktime_to_ms(active_time));
+ return sysfs_emit(buf, "%lld\n", ktime_to_ms(active_time));
}
static DEVICE_ATTR_RO(active_time_ms);
@@ -57,7 +57,8 @@ static ssize_t total_time_ms_show(struct device *dev,
active_time = ktime_sub(ktime_get(), ws->last_time);
total_time = ktime_add(total_time, active_time);
}
- return sprintf(buf, "%lld\n", ktime_to_ms(total_time));
+
+ return sysfs_emit(buf, "%lld\n", ktime_to_ms(total_time));
}
static DEVICE_ATTR_RO(total_time_ms);
@@ -73,7 +74,8 @@ static ssize_t max_time_ms_show(struct device *dev,
if (active_time > max_time)
max_time = active_time;
}
- return sprintf(buf, "%lld\n", ktime_to_ms(max_time));
+
+ return sysfs_emit(buf, "%lld\n", ktime_to_ms(max_time));
}
static DEVICE_ATTR_RO(max_time_ms);
@@ -82,7 +84,7 @@ static ssize_t last_change_ms_show(struct device *dev,
{
struct wakeup_source *ws = dev_get_drvdata(dev);
- return sprintf(buf, "%lld\n", ktime_to_ms(ws->last_time));
+ return sysfs_emit(buf, "%lld\n", ktime_to_ms(ws->last_time));
}
static DEVICE_ATTR_RO(last_change_ms);
@@ -91,7 +93,7 @@ static ssize_t name_show(struct device *dev, struct device_attribute *attr,
{
struct wakeup_source *ws = dev_get_drvdata(dev);
- return sprintf(buf, "%s\n", ws->name);
+ return sysfs_emit(buf, "%s\n", ws->name);
}
static DEVICE_ATTR_RO(name);
@@ -106,7 +108,8 @@ static ssize_t prevent_suspend_time_ms_show(struct device *dev,
prevent_sleep_time = ktime_add(prevent_sleep_time,
ktime_sub(ktime_get(), ws->start_prevent_time));
}
- return sprintf(buf, "%lld\n", ktime_to_ms(prevent_sleep_time));
+
+ return sysfs_emit(buf, "%lld\n", ktime_to_ms(prevent_sleep_time));
}
static DEVICE_ATTR_RO(prevent_suspend_time_ms);
diff --git a/drivers/base/property.c b/drivers/base/property.c
index d58aa98fe964..4c43d30145c6 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -1184,3 +1184,76 @@ const void *device_get_match_data(struct device *dev)
return fwnode_call_ptr_op(dev_fwnode(dev), device_get_match_data, dev);
}
EXPORT_SYMBOL_GPL(device_get_match_data);
+
+static void *
+fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
+ void *data, devcon_match_fn_t match)
+{
+ struct fwnode_handle *node;
+ struct fwnode_handle *ep;
+ void *ret;
+
+ fwnode_graph_for_each_endpoint(fwnode, ep) {
+ node = fwnode_graph_get_remote_port_parent(ep);
+ if (!fwnode_device_is_available(node))
+ continue;
+
+ ret = match(node, con_id, data);
+ fwnode_handle_put(node);
+ if (ret) {
+ fwnode_handle_put(ep);
+ return ret;
+ }
+ }
+ return NULL;
+}
+
+static void *
+fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
+ void *data, devcon_match_fn_t match)
+{
+ struct fwnode_handle *node;
+ void *ret;
+ int i;
+
+ for (i = 0; ; i++) {
+ node = fwnode_find_reference(fwnode, con_id, i);
+ if (IS_ERR(node))
+ break;
+
+ ret = match(node, NULL, data);
+ fwnode_handle_put(node);
+ if (ret)
+ return ret;
+ }
+
+ return NULL;
+}
+
+/**
+ * fwnode_connection_find_match - Find connection from a device node
+ * @fwnode: Device node with the connection
+ * @con_id: Identifier for the connection
+ * @data: Data for the match function
+ * @match: Function to check and convert the connection description
+ *
+ * Find a connection with unique identifier @con_id between @fwnode and another
+ * device node. @match will be used to convert the connection description to
+ * data the caller is expecting to be returned.
+ */
+void *fwnode_connection_find_match(struct fwnode_handle *fwnode,
+ const char *con_id, void *data,
+ devcon_match_fn_t match)
+{
+ void *ret;
+
+ if (!fwnode || !match)
+ return NULL;
+
+ ret = fwnode_graph_devcon_match(fwnode, con_id, data, match);
+ if (ret)
+ return ret;
+
+ return fwnode_devcon_match(fwnode, con_id, data, match);
+}
+EXPORT_SYMBOL_GPL(fwnode_connection_find_match);
diff --git a/drivers/base/soc.c b/drivers/base/soc.c
index a5bae551167d..d34609bb7386 100644
--- a/drivers/base/soc.c
+++ b/drivers/base/soc.c
@@ -17,9 +17,9 @@
static DEFINE_IDA(soc_ida);
-static ssize_t soc_info_get(struct device *dev,
- struct device_attribute *attr,
- char *buf);
+/* Prototype to allow declarations of DEVICE_ATTR(<foo>) before soc_info_show */
+static ssize_t soc_info_show(struct device *dev, struct device_attribute *attr,
+ char *buf);
struct soc_device {
struct device dev;
@@ -31,11 +31,11 @@ static struct bus_type soc_bus_type = {
.name = "soc",
};
-static DEVICE_ATTR(machine, S_IRUGO, soc_info_get, NULL);
-static DEVICE_ATTR(family, S_IRUGO, soc_info_get, NULL);
-static DEVICE_ATTR(serial_number, S_IRUGO, soc_info_get, NULL);
-static DEVICE_ATTR(soc_id, S_IRUGO, soc_info_get, NULL);
-static DEVICE_ATTR(revision, S_IRUGO, soc_info_get, NULL);
+static DEVICE_ATTR(machine, 0444, soc_info_show, NULL);
+static DEVICE_ATTR(family, 0444, soc_info_show, NULL);
+static DEVICE_ATTR(serial_number, 0444, soc_info_show, NULL);
+static DEVICE_ATTR(soc_id, 0444, soc_info_show, NULL);
+static DEVICE_ATTR(revision, 0444, soc_info_show, NULL);
struct device *soc_device_to_device(struct soc_device *soc_dev)
{
@@ -49,45 +49,41 @@ static umode_t soc_attribute_mode(struct kobject *kobj,
struct device *dev = kobj_to_dev(kobj);
struct soc_device *soc_dev = container_of(dev, struct soc_device, dev);
- if ((attr == &dev_attr_machine.attr)
- && (soc_dev->attr->machine != NULL))
+ if ((attr == &dev_attr_machine.attr) && soc_dev->attr->machine)
return attr->mode;
- if ((attr == &dev_attr_family.attr)
- && (soc_dev->attr->family != NULL))
+ if ((attr == &dev_attr_family.attr) && soc_dev->attr->family)
return attr->mode;
- if ((attr == &dev_attr_revision.attr)
- && (soc_dev->attr->revision != NULL))
+ if ((attr == &dev_attr_revision.attr) && soc_dev->attr->revision)
return attr->mode;
- if ((attr == &dev_attr_serial_number.attr)
- && (soc_dev->attr->serial_number != NULL))
+ if ((attr == &dev_attr_serial_number.attr) && soc_dev->attr->serial_number)
return attr->mode;
- if ((attr == &dev_attr_soc_id.attr)
- && (soc_dev->attr->soc_id != NULL))
+ if ((attr == &dev_attr_soc_id.attr) && soc_dev->attr->soc_id)
return attr->mode;
- /* Unknown or unfilled attribute. */
+ /* Unknown or unfilled attribute */
return 0;
}
-static ssize_t soc_info_get(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t soc_info_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
struct soc_device *soc_dev = container_of(dev, struct soc_device, dev);
+ const char *output;
if (attr == &dev_attr_machine)
- return sprintf(buf, "%s\n", soc_dev->attr->machine);
- if (attr == &dev_attr_family)
- return sprintf(buf, "%s\n", soc_dev->attr->family);
- if (attr == &dev_attr_revision)
- return sprintf(buf, "%s\n", soc_dev->attr->revision);
- if (attr == &dev_attr_serial_number)
- return sprintf(buf, "%s\n", soc_dev->attr->serial_number);
- if (attr == &dev_attr_soc_id)
- return sprintf(buf, "%s\n", soc_dev->attr->soc_id);
-
- return -EINVAL;
-
+ output = soc_dev->attr->machine;
+ else if (attr == &dev_attr_family)
+ output = soc_dev->attr->family;
+ else if (attr == &dev_attr_revision)
+ output = soc_dev->attr->revision;
+ else if (attr == &dev_attr_serial_number)
+ output = soc_dev->attr->serial_number;
+ else if (attr == &dev_attr_soc_id)
+ output = soc_dev->attr->soc_id;
+ else
+ return -EINVAL;
+
+ return sysfs_emit(buf, "%s\n", output);
}
static struct attribute *soc_attr[] = {
diff --git a/drivers/base/syscore.c b/drivers/base/syscore.c
index 0d346a307140..13db1f78d2ce 100644
--- a/drivers/base/syscore.c
+++ b/drivers/base/syscore.c
@@ -50,7 +50,7 @@ int syscore_suspend(void)
int ret = 0;
trace_suspend_resume(TPS("syscore_suspend"), 0, true);
- pr_debug("Checking wakeup interrupts\n");
+ pm_pr_dbg("Checking wakeup interrupts\n");
/* Return error code if there are any wakeup interrupts pending. */
if (pm_wakeup_pending())
@@ -61,8 +61,7 @@ int syscore_suspend(void)
list_for_each_entry_reverse(ops, &syscore_ops_list, node)
if (ops->suspend) {
- if (initcall_debug)
- pr_info("PM: Calling %pS\n", ops->suspend);
+ pm_pr_dbg("Calling %pS\n", ops->suspend);
ret = ops->suspend();
if (ret)
goto err_out;
@@ -99,8 +98,7 @@ void syscore_resume(void)
list_for_each_entry(ops, &syscore_ops_list, node)
if (ops->resume) {
- if (initcall_debug)
- pr_info("PM: Calling %pS\n", ops->resume);
+ pm_pr_dbg("Calling %pS\n", ops->resume);
ops->resume();
WARN_ONCE(!irqs_disabled(),
"Interrupts enabled after %pS\n", ops->resume);
diff --git a/drivers/base/topology.c b/drivers/base/topology.c
index ad8d33c6077b..4d254fcc93d1 100644
--- a/drivers/base/topology.c
+++ b/drivers/base/topology.c
@@ -14,11 +14,11 @@
#include <linux/hardirq.h>
#include <linux/topology.h>
-#define define_id_show_func(name) \
-static ssize_t name##_show(struct device *dev, \
- struct device_attribute *attr, char *buf) \
-{ \
- return sprintf(buf, "%d\n", topology_##name(dev->id)); \
+#define define_id_show_func(name) \
+static ssize_t name##_show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ return sysfs_emit(buf, "%d\n", topology_##name(dev->id)); \
}
#define define_siblings_show_map(name, mask) \
diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
index a0842d5ae950..170a9f82ca61 100644
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -987,9 +987,9 @@ static int pmbus_add_attribute(struct pmbus_data *data, struct attribute *attr)
{
if (data->num_attributes >= data->max_attributes - 1) {
int new_max_attrs = data->max_attributes + PMBUS_ATTR_ALLOC_SIZE;
- void *new_attrs = krealloc(data->group.attrs,
- new_max_attrs * sizeof(void *),
- GFP_KERNEL);
+ void *new_attrs = devm_krealloc(data->dev, data->group.attrs,
+ new_max_attrs * sizeof(void *),
+ GFP_KERNEL);
if (!new_attrs)
return -ENOMEM;
data->group.attrs = new_attrs;
@@ -2578,7 +2578,7 @@ int pmbus_do_probe(struct i2c_client *client, struct pmbus_driver_info *info)
ret = pmbus_find_attributes(client, data);
if (ret)
- goto out_kfree;
+ return ret;
/*
* If there are no attributes, something is wrong.
@@ -2586,35 +2586,27 @@ int pmbus_do_probe(struct i2c_client *client, struct pmbus_driver_info *info)
*/
if (!data->num_attributes) {
dev_err(dev, "No attributes found\n");
- ret = -ENODEV;
- goto out_kfree;
+ return -ENODEV;
}
data->groups[0] = &data->group;
memcpy(data->groups + 1, info->groups, sizeof(void *) * groups_num);
- data->hwmon_dev = hwmon_device_register_with_groups(dev, client->name,
- data, data->groups);
+ data->hwmon_dev = devm_hwmon_device_register_with_groups(dev,
+ client->name, data, data->groups);
if (IS_ERR(data->hwmon_dev)) {
- ret = PTR_ERR(data->hwmon_dev);
dev_err(dev, "Failed to register hwmon device\n");
- goto out_kfree;
+ return PTR_ERR(data->hwmon_dev);
}
ret = pmbus_regulator_register(data);
if (ret)
- goto out_unregister;
+ return ret;
ret = pmbus_init_debugfs(client, data);
if (ret)
dev_warn(dev, "Failed to register debugfs\n");
return 0;
-
-out_unregister:
- hwmon_device_unregister(data->hwmon_dev);
-out_kfree:
- kfree(data->group.attrs);
- return ret;
}
EXPORT_SYMBOL_GPL(pmbus_do_probe);
@@ -2624,8 +2616,6 @@ int pmbus_do_remove(struct i2c_client *client)
debugfs_remove_recursive(data->debugfs);
- hwmon_device_unregister(data->hwmon_dev);
- kfree(data->group.attrs);
return 0;
}
EXPORT_SYMBOL_GPL(pmbus_do_remove);
diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c
index d0b7ef296afb..f93c34fe5873 100644
--- a/drivers/iio/adc/xilinx-xadc-core.c
+++ b/drivers/iio/adc/xilinx-xadc-core.c
@@ -1092,6 +1092,7 @@ MODULE_DEVICE_TABLE(of, xadc_of_match_table);
static int xadc_parse_dt(struct iio_dev *indio_dev, struct device_node *np,
unsigned int *conf)
{
+ struct device *dev = indio_dev->dev.parent;
struct xadc *xadc = iio_priv(indio_dev);
struct iio_chan_spec *channels, *chan;
struct device_node *chan_node, *child;
@@ -1136,7 +1137,8 @@ static int xadc_parse_dt(struct iio_dev *indio_dev, struct device_node *np,
*conf |= XADC_CONF0_MUX | XADC_CONF0_CHAN(ext_mux_chan);
}
- channels = kmemdup(xadc_channels, sizeof(xadc_channels), GFP_KERNEL);
+ channels = devm_kmemdup(dev, xadc_channels,
+ sizeof(xadc_channels), GFP_KERNEL);
if (!channels)
return -ENOMEM;
@@ -1172,8 +1174,9 @@ static int xadc_parse_dt(struct iio_dev *indio_dev, struct device_node *np,
of_node_put(chan_node);
indio_dev->num_channels = num_channels;
- indio_dev->channels = krealloc(channels, sizeof(*channels) *
- num_channels, GFP_KERNEL);
+ indio_dev->channels = devm_krealloc(dev, channels,
+ sizeof(*channels) * num_channels,
+ GFP_KERNEL);
/* If we can't resize the channels array, just use the original */
if (!indio_dev->channels)
indio_dev->channels = channels;
@@ -1225,14 +1228,14 @@ static int xadc_probe(struct platform_device *pdev)
ret = xadc_parse_dt(indio_dev, pdev->dev.of_node, &conf0);
if (ret)
- goto err_device_free;
+ return ret;
if (xadc->ops->flags & XADC_FLAGS_BUFFERED) {
ret = iio_triggered_buffer_setup(indio_dev,
&iio_pollfunc_store_time, &xadc_trigger_handler,
&xadc_buffer_ops);
if (ret)
- goto err_device_free;
+ return ret;
xadc->convst_trigger = xadc_alloc_trigger(indio_dev, "convst");
if (IS_ERR(xadc->convst_trigger)) {
@@ -1350,8 +1353,6 @@ err_free_convst_trigger:
err_triggered_buffer_cleanup:
if (xadc->ops->flags & XADC_FLAGS_BUFFERED)
iio_triggered_buffer_cleanup(indio_dev);
-err_device_free:
- kfree(indio_dev->channels);
return ret;
}
@@ -1371,7 +1372,6 @@ static int xadc_remove(struct platform_device *pdev)
cancel_delayed_work_sync(&xadc->zynq_unmask_work);
clk_disable_unprepare(xadc->clk);
kfree(xadc->data);
- kfree(indio_dev->channels);
return 0;
}
diff --git a/drivers/usb/roles/class.c b/drivers/usb/roles/class.c
index 27d92af29635..97f37077b7f9 100644
--- a/drivers/usb/roles/class.c
+++ b/drivers/usb/roles/class.c
@@ -87,19 +87,15 @@ enum usb_role usb_role_switch_get_role(struct usb_role_switch *sw)
}
EXPORT_SYMBOL_GPL(usb_role_switch_get_role);
-static void *usb_role_switch_match(struct device_connection *con, int ep,
+static void *usb_role_switch_match(struct fwnode_handle *fwnode, const char *id,
void *data)
{
struct device *dev;
- if (con->fwnode) {
- if (con->id && !fwnode_property_present(con->fwnode, con->id))
- return NULL;
+ if (id && !fwnode_property_present(fwnode, id))
+ return NULL;
- dev = class_find_device_by_fwnode(role_class, con->fwnode);
- } else {
- dev = class_find_device_by_name(role_class, con->endpoint[ep]);
- }
+ dev = class_find_device_by_fwnode(role_class, fwnode);
return dev ? to_role_switch(dev) : ERR_PTR(-EPROBE_DEFER);
}
diff --git a/drivers/usb/typec/mux.c b/drivers/usb/typec/mux.c
index 52ad277e4565..b069a5122aaa 100644
--- a/drivers/usb/typec/mux.c
+++ b/drivers/usb/typec/mux.c
@@ -34,15 +34,15 @@ static int switch_fwnode_match(struct device *dev, const void *fwnode)
return dev_fwnode(dev) == fwnode && dev_name_ends_with(dev, "-switch");
}
-static void *typec_switch_match(struct device_connection *con, int ep,
+static void *typec_switch_match(struct fwnode_handle *fwnode, const char *id,
void *data)
{
struct device *dev;
- if (con->id && !fwnode_property_present(con->fwnode, con->id))
+ if (id && !fwnode_property_present(fwnode, id))
return NULL;
- dev = class_find_device(&typec_mux_class, NULL, con->fwnode,
+ dev = class_find_device(&typec_mux_class, NULL, fwnode,
switch_fwnode_match);
return dev ? to_typec_switch(dev) : ERR_PTR(-EPROBE_DEFER);
@@ -183,7 +183,8 @@ static int mux_fwnode_match(struct device *dev, const void *fwnode)
return dev_fwnode(dev) == fwnode && dev_name_ends_with(dev, "-mux");
}
-static void *typec_mux_match(struct device_connection *con, int ep, void *data)
+static void *typec_mux_match(struct fwnode_handle *fwnode, const char *id,
+ void *data)
{
const struct typec_altmode_desc *desc = data;
struct device *dev;
@@ -196,20 +197,20 @@ static void *typec_mux_match(struct device_connection *con, int ep, void *data)
* Check has the identifier already been "consumed". If it
* has, no need to do any extra connection identification.
*/
- match = !con->id;
+ match = !id;
if (match)
goto find_mux;
/* Accessory Mode muxes */
if (!desc) {
- match = fwnode_property_present(con->fwnode, "accessory");
+ match = fwnode_property_present(fwnode, "accessory");
if (match)
goto find_mux;
return NULL;
}
/* Alternate Mode muxes */
- nval = fwnode_property_count_u16(con->fwnode, "svid");
+ nval = fwnode_property_count_u16(fwnode, "svid");
if (nval <= 0)
return NULL;
@@ -217,7 +218,7 @@ static void *typec_mux_match(struct device_connection *con, int ep, void *data)
if (!val)
return ERR_PTR(-ENOMEM);
- nval = fwnode_property_read_u16_array(con->fwnode, "svid", val, nval);
+ nval = fwnode_property_read_u16_array(fwnode, "svid", val, nval);
if (nval < 0) {
kfree(val);
return ERR_PTR(nval);
@@ -234,7 +235,7 @@ static void *typec_mux_match(struct device_connection *con, int ep, void *data)
return NULL;
find_mux:
- dev = class_find_device(&typec_mux_class, NULL, con->fwnode,
+ dev = class_find_device(&typec_mux_class, NULL, fwnode,
mux_fwnode_match);
return dev ? to_typec_switch(dev) : ERR_PTR(-EPROBE_DEFER);
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index eb6897ab78e7..96d0da65e088 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -15,6 +15,7 @@
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/seq_file.h>
+#include <linux/mm.h>
#include "sysfs.h"
@@ -707,3 +708,57 @@ int sysfs_change_owner(struct kobject *kobj, kuid_t kuid, kgid_t kgid)
return 0;
}
EXPORT_SYMBOL_GPL(sysfs_change_owner);
+
+/**
+ * sysfs_emit - scnprintf equivalent, aware of PAGE_SIZE buffer.
+ * @buf: start of PAGE_SIZE buffer.
+ * @fmt: format
+ * @...: optional arguments to @format
+ *
+ *
+ * Returns number of characters written to @buf.
+ */
+int sysfs_emit(char *buf, const char *fmt, ...)
+{
+ va_list args;
+ int len;
+
+ if (WARN(!buf || offset_in_page(buf),
+ "invalid sysfs_emit: buf:%p\n", buf))
+ return 0;
+
+ va_start(args, fmt);
+ len = vscnprintf(buf, PAGE_SIZE, fmt, args);
+ va_end(args);
+
+ return len;
+}
+EXPORT_SYMBOL_GPL(sysfs_emit);
+
+/**
+ * sysfs_emit_at - scnprintf equivalent, aware of PAGE_SIZE buffer.
+ * @buf: start of PAGE_SIZE buffer.
+ * @at: offset in @buf to start write in bytes
+ * @at must be >= 0 && < PAGE_SIZE
+ * @fmt: format
+ * @...: optional arguments to @fmt
+ *
+ *
+ * Returns number of characters written starting at &@buf[@at].
+ */
+int sysfs_emit_at(char *buf, int at, const char *fmt, ...)
+{
+ va_list args;
+ int len;
+
+ if (WARN(!buf || offset_in_page(buf) || at < 0 || at >= PAGE_SIZE,
+ "invalid sysfs_emit_at: buf:%p at:%d\n", buf, at))
+ return 0;
+
+ va_start(args, fmt);
+ len = vscnprintf(buf + at, PAGE_SIZE - at, fmt, args);
+ va_end(args);
+
+ return len;
+}
+EXPORT_SYMBOL_GPL(sysfs_emit_at);
diff --git a/include/linux/device.h b/include/linux/device.h
index 9e6ea8931a52..a8e3a86e35f6 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -206,6 +206,8 @@ int devres_release_group(struct device *dev, void *id);
/* managed devm_k.alloc/kfree for device drivers */
void *devm_kmalloc(struct device *dev, size_t size, gfp_t gfp) __malloc;
+void *devm_krealloc(struct device *dev, void *ptr, size_t size,
+ gfp_t gfp) __must_check;
__printf(3, 0) char *devm_kvasprintf(struct device *dev, gfp_t gfp,
const char *fmt, va_list ap) __malloc;
__printf(3, 4) char *devm_kasprintf(struct device *dev, gfp_t gfp,
@@ -293,62 +295,6 @@ struct device_dma_parameters {
};
/**
- * struct device_connection - Device Connection Descriptor
- * @fwnode: The device node of the connected device
- * @endpoint: The names of the two devices connected together
- * @id: Unique identifier for the connection
- * @list: List head, private, for internal use only
- *
- * NOTE: @fwnode is not used together with @endpoint. @fwnode is used when
- * platform firmware defines the connection. When the connection is registered
- * with device_connection_add() @endpoint is used instead.
- */
-struct device_connection {
- struct fwnode_handle *fwnode;
- const char *endpoint[2];
- const char *id;
- struct list_head list;
-};
-
-typedef void *(*devcon_match_fn_t)(struct device_connection *con, int ep,
- void *data);
-
-void *fwnode_connection_find_match(struct fwnode_handle *fwnode,
- const char *con_id, void *data,
- devcon_match_fn_t match);
-void *device_connection_find_match(struct device *dev, const char *con_id,
- void *data, devcon_match_fn_t match);
-
-struct device *device_connection_find(struct device *dev, const char *con_id);
-
-void device_connection_add(struct device_connection *con);
-void device_connection_remove(struct device_connection *con);
-
-/**
- * device_connections_add - Add multiple device connections at once
- * @cons: Zero terminated array of device connection descriptors
- */
-static inline void device_connections_add(struct device_connection *cons)
-{
- struct device_connection *c;
-
- for (c = cons; c->endpoint[0]; c++)
- device_connection_add(c);
-}
-
-/**
- * device_connections_remove - Remove multiple device connections at once
- * @cons: Zero terminated array of device connection descriptors
- */
-static inline void device_connections_remove(struct device_connection *cons)
-{
- struct device_connection *c;
-
- for (c = cons; c->endpoint[0]; c++)
- device_connection_remove(c);
-}
-
-/**
* enum device_link_state - Device link states.
* @DL_STATE_NONE: The presence of the drivers is not being tracked.
* @DL_STATE_DORMANT: None of the supplier/consumer drivers is present.
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index d5cc5f802dd4..ebca2ef02212 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -129,7 +129,7 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
unsigned long start, unsigned long end,
struct page *ref_page);
void hugetlb_report_meminfo(struct seq_file *);
-int hugetlb_report_node_meminfo(int, char *);
+int hugetlb_report_node_meminfo(char *buf, int len, int nid);
void hugetlb_show_meminfo(void);
unsigned long hugetlb_total_pages(void);
vm_fault_t hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
@@ -245,7 +245,7 @@ static inline void hugetlb_report_meminfo(struct seq_file *m)
{
}
-static inline int hugetlb_report_node_meminfo(int nid, char *buf)
+static inline int hugetlb_report_node_meminfo(char *buf, int len, int nid)
{
return 0;
}
diff --git a/include/linux/property.h b/include/linux/property.h
index 75c178055bc9..2d4542629d80 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -431,6 +431,20 @@ fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode,
int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
struct fwnode_endpoint *endpoint);
+typedef void *(*devcon_match_fn_t)(struct fwnode_handle *fwnode, const char *id,
+ void *data);
+
+void *fwnode_connection_find_match(struct fwnode_handle *fwnode,
+ const char *con_id, void *data,
+ devcon_match_fn_t match);
+
+static inline void *device_connection_find_match(struct device *dev,
+ const char *con_id, void *data,
+ devcon_match_fn_t match)
+{
+ return fwnode_connection_find_match(dev_fwnode(dev), con_id, data, match);
+}
+
/* -------------------------------------------------------------------------- */
/* Software fwnode support - when HW description is incomplete or missing */
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 34e84122f635..2caa34c1ca1a 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -329,6 +329,10 @@ int sysfs_groups_change_owner(struct kobject *kobj,
int sysfs_group_change_owner(struct kobject *kobj,
const struct attribute_group *groups, kuid_t kuid,
kgid_t kgid);
+__printf(2, 3)
+int sysfs_emit(char *buf, const char *fmt, ...);
+__printf(3, 4)
+int sysfs_emit_at(char *buf, int at, const char *fmt, ...);
#else /* CONFIG_SYSFS */
@@ -576,6 +580,17 @@ static inline int sysfs_group_change_owner(struct kobject *kobj,
return 0;
}
+__printf(2, 3)
+static inline int sysfs_emit(char *buf, const char *fmt, ...)
+{
+ return 0;
+}
+
+__printf(3, 4)
+static inline int sysfs_emit_at(char *buf, int at, const char *fmt, ...)
+{
+ return 0;
+}
#endif /* CONFIG_SYSFS */
static inline int __must_check sysfs_create_file(struct kobject *kobj,
diff --git a/lib/devres.c b/lib/devres.c
index ebb1573d9ae3..2a4ff5d64288 100644
--- a/lib/devres.c
+++ b/lib/devres.c
@@ -162,13 +162,15 @@ __devm_ioremap_resource(struct device *dev, const struct resource *res,
* region and ioremaps it. All operations are managed and will be undone
* on driver detach.
*
- * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
- * on failure. Usage example:
+ * Usage example:
*
* res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
* base = devm_ioremap_resource(&pdev->dev, res);
* if (IS_ERR(base))
* return PTR_ERR(base);
+ *
+ * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code
+ * on failure.
*/
void __iomem *devm_ioremap_resource(struct device *dev,
const struct resource *res)
@@ -183,8 +185,8 @@ EXPORT_SYMBOL(devm_ioremap_resource);
* @dev: generic device to handle the resource for
* @res: resource to be handled
*
- * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
- * on failure. Usage example:
+ * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code
+ * on failure.
*/
void __iomem *devm_ioremap_resource_wc(struct device *dev,
const struct resource *res)
@@ -207,8 +209,8 @@ void __iomem *devm_ioremap_resource_wc(struct device *dev,
* @node: The device-tree node where the resource resides
* @index: index of the MMIO range in the "reg" property
* @size: Returns the size of the resource (pass NULL if not needed)
- * Returns a pointer to the requested and mapped memory or an ERR_PTR() encoded
- * error code on failure. Usage example:
+ *
+ * Usage example:
*
* base = devm_of_iomap(&pdev->dev, node, 0, NULL);
* if (IS_ERR(base))
@@ -217,8 +219,10 @@ void __iomem *devm_ioremap_resource_wc(struct device *dev,
* Please Note: This is not a one-to-one replacement for of_iomap() because the
* of_iomap() function does not track whether the region is already mapped. If
* two drivers try to map the same memory, the of_iomap() function will succeed
- * but the the devm_of_iomap() function will return -EBUSY.
+ * but the devm_of_iomap() function will return -EBUSY.
*
+ * Return: a pointer to the requested and mapped memory or an ERR_PTR() encoded
+ * error code on failure.
*/
void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index,
resource_size_t *size)
@@ -256,6 +260,8 @@ static int devm_ioport_map_match(struct device *dev, void *res,
*
* Managed ioport_map(). Map is automatically unmapped on driver
* detach.
+ *
+ * Return: a pointer to the remapped memory or NULL on failure.
*/
void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
unsigned int nr)
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 2d4dfd44b0fa..bd7b3aaa93c3 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -384,10 +384,13 @@ static int ddebug_parse_query(char *words[], int nwords,
query->module = modname;
for (i = 0; i < nwords; i += 2) {
- if (!strcmp(words[i], "func")) {
- rc = check_set(&query->function, words[i+1], "func");
- } else if (!strcmp(words[i], "file")) {
- if (check_set(&query->filename, words[i+1], "file"))
+ char *keyword = words[i];
+ char *arg = words[i+1];
+
+ if (!strcmp(keyword, "func")) {
+ rc = check_set(&query->function, arg, "func");
+ } else if (!strcmp(keyword, "file")) {
+ if (check_set(&query->filename, arg, "file"))
return -EINVAL;
/* tail :$info is function or line-range */
@@ -403,18 +406,18 @@ static int ddebug_parse_query(char *words[], int nwords,
if (parse_linerange(query, fline))
return -EINVAL;
}
- } else if (!strcmp(words[i], "module")) {
- rc = check_set(&query->module, words[i+1], "module");
- } else if (!strcmp(words[i], "format")) {
- string_unescape_inplace(words[i+1], UNESCAPE_SPACE |
+ } else if (!strcmp(keyword, "module")) {
+ rc = check_set(&query->module, arg, "module");
+ } else if (!strcmp(keyword, "format")) {
+ string_unescape_inplace(arg, UNESCAPE_SPACE |
UNESCAPE_OCTAL |
UNESCAPE_SPECIAL);
- rc = check_set(&query->format, words[i+1], "format");
- } else if (!strcmp(words[i], "line")) {
- if (parse_linerange(query, words[i+1]))
+ rc = check_set(&query->format, arg, "format");
+ } else if (!strcmp(keyword, "line")) {
+ if (parse_linerange(query, arg))
return -EINVAL;
} else {
- pr_err("unknown keyword \"%s\"\n", words[i]);
+ pr_err("unknown keyword \"%s\"\n", keyword);
return -EINVAL;
}
if (rc)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 2fb9a4c7a161..ddbd3b355361 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -3571,18 +3571,20 @@ void hugetlb_report_meminfo(struct seq_file *m)
seq_printf(m, "Hugetlb: %8lu kB\n", total / 1024);
}
-int hugetlb_report_node_meminfo(int nid, char *buf)
+int hugetlb_report_node_meminfo(char *buf, int len, int nid)
{
struct hstate *h = &default_hstate;
+
if (!hugepages_supported())
return 0;
- return sprintf(buf,
- "Node %d HugePages_Total: %5u\n"
- "Node %d HugePages_Free: %5u\n"
- "Node %d HugePages_Surp: %5u\n",
- nid, h->nr_huge_pages_node[nid],
- nid, h->free_huge_pages_node[nid],
- nid, h->surplus_huge_pages_node[nid]);
+
+ return sysfs_emit_at(buf, len,
+ "Node %d HugePages_Total: %5u\n"
+ "Node %d HugePages_Free: %5u\n"
+ "Node %d HugePages_Surp: %5u\n",
+ nid, h->nr_huge_pages_node[nid],
+ nid, h->free_huge_pages_node[nid],
+ nid, h->surplus_huge_pages_node[nid]);
}
void hugetlb_show_meminfo(void)
diff --git a/scripts/dev-needs.sh b/scripts/dev-needs.sh
new file mode 100755
index 000000000000..454cc304fb44
--- /dev/null
+++ b/scripts/dev-needs.sh
@@ -0,0 +1,315 @@
+#! /bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2020, Google LLC. All rights reserved.
+# Author: Saravana Kannan <saravanak@google.com>
+
+function help() {
+ cat << EOF
+Usage: $(basename $0) [-c|-d|-m|-f] [filter options] <list of devices>
+
+This script needs to be run on the target device once it has booted to a
+shell.
+
+The script takes as input a list of one or more device directories under
+/sys/devices and then lists the probe dependency chain (suppliers and
+parents) of these devices. It does a breadth first search of the dependency
+chain, so the last entry in the output is close to the root of the
+dependency chain.
+
+By default it lists the full path to the devices under /sys/devices.
+
+It also takes an optional modifier flag as the first parameter to change
+what information is listed in the output. If the requested information is
+not available, the device name is printed.
+
+ -c lists the compatible string of the dependencies
+ -d lists the driver name of the dependencies that have probed
+ -m lists the module name of the dependencies that have a module
+ -f list the firmware node path of the dependencies
+ -g list the dependencies as edges and nodes for graphviz
+ -t list the dependencies as edges for tsort
+
+The filter options provide a way to filter out some dependencies:
+ --allow-no-driver By default dependencies that don't have a driver
+ attached are ignored. This is to avoid following
+ device links to "class" devices that are created
+ when the consumer probes (as in, not a probe
+ dependency). If you want to follow these links
+ anyway, use this flag.
+
+ --exclude-devlinks Don't follow device links when tracking probe
+ dependencies.
+
+ --exclude-parents Don't follow parent devices when tracking probe
+ dependencies.
+
+EOF
+}
+
+function dev_to_detail() {
+ local i=0
+ while [ $i -lt ${#OUT_LIST[@]} ]
+ do
+ local C=${OUT_LIST[i]}
+ local S=${OUT_LIST[i+1]}
+ local D="'$(detail_chosen $C $S)'"
+ if [ ! -z "$D" ]
+ then
+ # This weirdness is needed to work with toybox when
+ # using the -t option.
+ printf '%05u\t%s\n' ${i} "$D" | tr -d \'
+ fi
+ i=$((i+2))
+ done
+}
+
+function already_seen() {
+ local i=0
+ while [ $i -lt ${#OUT_LIST[@]} ]
+ do
+ if [ "$1" = "${OUT_LIST[$i]}" ]
+ then
+ # if-statement treats 0 (no-error) as true
+ return 0
+ fi
+ i=$(($i+2))
+ done
+
+ # if-statement treats 1 (error) as false
+ return 1
+}
+
+# Return 0 (no-error/true) if parent was added
+function add_parent() {
+
+ if [ ${ALLOW_PARENTS} -eq 0 ]
+ then
+ return 1
+ fi
+
+ local CON=$1
+ # $CON could be a symlink path. So, we need to find the real path and
+ # then go up one level to find the real parent.
+ local PARENT=$(realpath $CON/..)
+
+ while [ ! -e ${PARENT}/driver ]
+ do
+ if [ "$PARENT" = "/sys/devices" ]
+ then
+ return 1
+ fi
+ PARENT=$(realpath $PARENT/..)
+ done
+
+ CONSUMERS+=($PARENT)
+ OUT_LIST+=(${CON} ${PARENT})
+ return 0
+}
+
+# Return 0 (no-error/true) if one or more suppliers were added
+function add_suppliers() {
+ local CON=$1
+ local RET=1
+
+ if [ ${ALLOW_DEVLINKS} -eq 0 ]
+ then
+ return 1
+ fi
+
+ SUPPLIER_LINKS=$(ls -1d $CON/supplier:* 2>/dev/null)
+ for SL in $SUPPLIER_LINKS;
+ do
+ SYNC_STATE=$(cat $SL/sync_state_only)
+
+ # sync_state_only links are proxy dependencies.
+ # They can also have cycles. So, don't follow them.
+ if [ "$SYNC_STATE" != '0' ]
+ then
+ continue
+ fi
+
+ SUPPLIER=$(realpath $SL/supplier)
+
+ if [ ! -e $SUPPLIER/driver -a ${ALLOW_NO_DRIVER} -eq 0 ]
+ then
+ continue
+ fi
+
+ CONSUMERS+=($SUPPLIER)
+ OUT_LIST+=(${CON} ${SUPPLIER})
+ RET=0
+ done
+
+ return $RET
+}
+
+function detail_compat() {
+ f=$1/of_node/compatible
+ if [ -e $f ]
+ then
+ echo -n $(cat $f)
+ else
+ echo -n $1
+ fi
+}
+
+function detail_module() {
+ f=$1/driver/module
+ if [ -e $f ]
+ then
+ echo -n $(basename $(realpath $f))
+ else
+ echo -n $1
+ fi
+}
+
+function detail_driver() {
+ f=$1/driver
+ if [ -e $f ]
+ then
+ echo -n $(basename $(realpath $f))
+ else
+ echo -n $1
+ fi
+}
+
+function detail_fwnode() {
+ f=$1/firmware_node
+ if [ ! -e $f ]
+ then
+ f=$1/of_node
+ fi
+
+ if [ -e $f ]
+ then
+ echo -n $(realpath $f)
+ else
+ echo -n $1
+ fi
+}
+
+function detail_graphviz() {
+ if [ "$2" != "ROOT" ]
+ then
+ echo -n "\"$(basename $2)\"->\"$(basename $1)\""
+ else
+ echo -n "\"$(basename $1)\""
+ fi
+}
+
+function detail_tsort() {
+ echo -n "\"$2\" \"$1\""
+}
+
+function detail_device() { echo -n $1; }
+
+alias detail=detail_device
+ALLOW_NO_DRIVER=0
+ALLOW_DEVLINKS=1
+ALLOW_PARENTS=1
+
+while [ $# -gt 0 ]
+do
+ ARG=$1
+ case $ARG in
+ --help)
+ help
+ exit 0
+ ;;
+ -c)
+ alias detail=detail_compat
+ ;;
+ -m)
+ alias detail=detail_module
+ ;;
+ -d)
+ alias detail=detail_driver
+ ;;
+ -f)
+ alias detail=detail_fwnode
+ ;;
+ -g)
+ alias detail=detail_graphviz
+ ;;
+ -t)
+ alias detail=detail_tsort
+ ;;
+ --allow-no-driver)
+ ALLOW_NO_DRIVER=1
+ ;;
+ --exclude-devlinks)
+ ALLOW_DEVLINKS=0
+ ;;
+ --exclude-parents)
+ ALLOW_PARENTS=0
+ ;;
+ *)
+ # Stop at the first argument that's not an option.
+ break
+ ;;
+ esac
+ shift
+done
+
+function detail_chosen() {
+ detail $1 $2
+}
+
+if [ $# -eq 0 ]
+then
+ help
+ exit 1
+fi
+
+CONSUMERS=($@)
+OUT_LIST=()
+
+# Do a breadth first, non-recursive tracking of suppliers. The parent is also
+# considered a "supplier" as a device can't probe without its parent.
+i=0
+while [ $i -lt ${#CONSUMERS[@]} ]
+do
+ CONSUMER=$(realpath ${CONSUMERS[$i]})
+ i=$(($i+1))
+
+ if already_seen ${CONSUMER}
+ then
+ continue
+ fi
+
+ # If this is not a device with a driver, we don't care about its
+ # suppliers.
+ if [ ! -e ${CONSUMER}/driver -a ${ALLOW_NO_DRIVER} -eq 0 ]
+ then
+ continue
+ fi
+
+ ROOT=1
+
+ # Add suppliers to CONSUMERS list and output the consumer details.
+ #
+ # We don't need to worry about a cycle in the dependency chain causing
+ # infinite loops. That's because the kernel doesn't allow cycles in
+ # device links unless it's a sync_state_only device link. And we ignore
+ # sync_state_only device links inside add_suppliers.
+ if add_suppliers ${CONSUMER}
+ then
+ ROOT=0
+ fi
+
+ if add_parent ${CONSUMER}
+ then
+ ROOT=0
+ fi
+
+ if [ $ROOT -eq 1 ]
+ then
+ OUT_LIST+=(${CONSUMER} "ROOT")
+ fi
+done
+
+# Can NOT combine sort and uniq using sort -suk2 because stable sort in toybox
+# isn't really stable.
+dev_to_detail | sort -k2 -k1 | uniq -f 1 | sort | cut -f2-
+
+exit 0