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authorLinus Torvalds <torvalds@linux-foundation.org>2011-10-25 12:13:59 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2011-10-25 12:13:59 +0200
commit2d03423b2319cc854adeb28a03f65de5b5e0ab63 (patch)
tree20d9ddb661f3247f5dfaa6da8212123ed14a24c4 /lib
parent59e52534172d845ebffb0d7e85fc56fb7b857051 (diff)
parent2bbcb8788311a40714b585fc11b51da6ffa2ab92 (diff)
downloadlinux-2d03423b2319cc854adeb28a03f65de5b5e0ab63.tar.gz
Merge branch 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
* 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (38 commits) mm: memory hotplug: Check if pages are correctly reserved on a per-section basis Revert "memory hotplug: Correct page reservation checking" Update email address for stable patch submission dynamic_debug: fix undefined reference to `__netdev_printk' dynamic_debug: use a single printk() to emit messages dynamic_debug: remove num_enabled accounting dynamic_debug: consolidate repetitive struct _ddebug descriptor definitions uio: Support physical addresses >32 bits on 32-bit systems sysfs: add unsigned long cast to prevent compile warning drivers: base: print rejected matches with DEBUG_DRIVER memory hotplug: Correct page reservation checking memory hotplug: Refuse to add unaligned memory regions remove the messy code file Documentation/zh_CN/SubmitChecklist ARM: mxc: convert device creation to use platform_device_register_full new helper to create platform devices with dma mask docs/driver-model: Update device class docs docs/driver-model: Document device.groups kobj_uevent: Ignore if some listeners cannot handle message dynamic_debug: make netif_dbg() call __netdev_printk() dynamic_debug: make netdev_dbg() call __netdev_printk() ...
Diffstat (limited to 'lib')
-rw-r--r--lib/dynamic_debug.c173
-rw-r--r--lib/kobject_uevent.c2
2 files changed, 120 insertions, 55 deletions
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 79fc20b65e7..dcdade39e47 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -10,6 +10,8 @@
* Copyright (C) 2011 Bart Van Assche. All Rights Reserved.
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
@@ -29,6 +31,8 @@
#include <linux/jump_label.h>
#include <linux/hardirq.h>
#include <linux/sched.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
extern struct _ddebug __start___verbose[];
extern struct _ddebug __stop___verbose[];
@@ -37,7 +41,6 @@ struct ddebug_table {
struct list_head link;
char *mod_name;
unsigned int num_ddebugs;
- unsigned int num_enabled;
struct _ddebug *ddebugs;
};
@@ -147,19 +150,13 @@ static void ddebug_change(const struct ddebug_query *query,
newflags = (dp->flags & mask) | flags;
if (newflags == dp->flags)
continue;
-
- if (!newflags)
- dt->num_enabled--;
- else if (!dp->flags)
- dt->num_enabled++;
dp->flags = newflags;
if (newflags)
dp->enabled = 1;
else
dp->enabled = 0;
if (verbose)
- printk(KERN_INFO
- "ddebug: changed %s:%d [%s]%s %s\n",
+ pr_info("changed %s:%d [%s]%s %s\n",
dp->filename, dp->lineno,
dt->mod_name, dp->function,
ddebug_describe_flags(dp, flagbuf,
@@ -169,7 +166,7 @@ static void ddebug_change(const struct ddebug_query *query,
mutex_unlock(&ddebug_lock);
if (!nfound && verbose)
- printk(KERN_INFO "ddebug: no matches for query\n");
+ pr_info("no matches for query\n");
}
/*
@@ -214,10 +211,10 @@ static int ddebug_tokenize(char *buf, char *words[], int maxwords)
if (verbose) {
int i;
- printk(KERN_INFO "%s: split into words:", __func__);
+ pr_info("split into words:");
for (i = 0 ; i < nwords ; i++)
- printk(" \"%s\"", words[i]);
- printk("\n");
+ pr_cont(" \"%s\"", words[i]);
+ pr_cont("\n");
}
return nwords;
@@ -329,16 +326,15 @@ static int ddebug_parse_query(char *words[], int nwords,
}
} else {
if (verbose)
- printk(KERN_ERR "%s: unknown keyword \"%s\"\n",
- __func__, words[i]);
+ pr_err("unknown keyword \"%s\"\n", words[i]);
return -EINVAL;
}
}
if (verbose)
- printk(KERN_INFO "%s: q->function=\"%s\" q->filename=\"%s\" "
- "q->module=\"%s\" q->format=\"%s\" q->lineno=%u-%u\n",
- __func__, query->function, query->filename,
+ pr_info("q->function=\"%s\" q->filename=\"%s\" "
+ "q->module=\"%s\" q->format=\"%s\" q->lineno=%u-%u\n",
+ query->function, query->filename,
query->module, query->format, query->first_lineno,
query->last_lineno);
@@ -367,7 +363,7 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
return -EINVAL;
}
if (verbose)
- printk(KERN_INFO "%s: op='%c'\n", __func__, op);
+ pr_info("op='%c'\n", op);
for ( ; *str ; ++str) {
for (i = ARRAY_SIZE(opt_array) - 1; i >= 0; i--) {
@@ -382,7 +378,7 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
if (flags == 0)
return -EINVAL;
if (verbose)
- printk(KERN_INFO "%s: flags=0x%x\n", __func__, flags);
+ pr_info("flags=0x%x\n", flags);
/* calculate final *flagsp, *maskp according to mask and op */
switch (op) {
@@ -400,8 +396,7 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
break;
}
if (verbose)
- printk(KERN_INFO "%s: *flagsp=0x%x *maskp=0x%x\n",
- __func__, *flagsp, *maskp);
+ pr_info("*flagsp=0x%x *maskp=0x%x\n", *flagsp, *maskp);
return 0;
}
@@ -426,40 +421,117 @@ static int ddebug_exec_query(char *query_string)
return 0;
}
+#define PREFIX_SIZE 64
+
+static int remaining(int wrote)
+{
+ if (PREFIX_SIZE - wrote > 0)
+ return PREFIX_SIZE - wrote;
+ return 0;
+}
+
+static char *dynamic_emit_prefix(const struct _ddebug *desc, char *buf)
+{
+ int pos_after_tid;
+ int pos = 0;
+
+ pos += snprintf(buf + pos, remaining(pos), "%s", KERN_DEBUG);
+ if (desc->flags & _DPRINTK_FLAGS_INCL_TID) {
+ if (in_interrupt())
+ pos += snprintf(buf + pos, remaining(pos), "%s ",
+ "<intr>");
+ else
+ pos += snprintf(buf + pos, remaining(pos), "[%d] ",
+ task_pid_vnr(current));
+ }
+ pos_after_tid = pos;
+ if (desc->flags & _DPRINTK_FLAGS_INCL_MODNAME)
+ pos += snprintf(buf + pos, remaining(pos), "%s:",
+ desc->modname);
+ if (desc->flags & _DPRINTK_FLAGS_INCL_FUNCNAME)
+ pos += snprintf(buf + pos, remaining(pos), "%s:",
+ desc->function);
+ if (desc->flags & _DPRINTK_FLAGS_INCL_LINENO)
+ pos += snprintf(buf + pos, remaining(pos), "%d:", desc->lineno);
+ if (pos - pos_after_tid)
+ pos += snprintf(buf + pos, remaining(pos), " ");
+ if (pos >= PREFIX_SIZE)
+ buf[PREFIX_SIZE - 1] = '\0';
+
+ return buf;
+}
+
int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...)
{
va_list args;
int res;
+ struct va_format vaf;
+ char buf[PREFIX_SIZE];
BUG_ON(!descriptor);
BUG_ON(!fmt);
va_start(args, fmt);
- res = printk(KERN_DEBUG);
- if (descriptor->flags & _DPRINTK_FLAGS_INCL_TID) {
- if (in_interrupt())
- res += printk(KERN_CONT "<intr> ");
- else
- res += printk(KERN_CONT "[%d] ", task_pid_vnr(current));
- }
- if (descriptor->flags & _DPRINTK_FLAGS_INCL_MODNAME)
- res += printk(KERN_CONT "%s:", descriptor->modname);
- if (descriptor->flags & _DPRINTK_FLAGS_INCL_FUNCNAME)
- res += printk(KERN_CONT "%s:", descriptor->function);
- if (descriptor->flags & _DPRINTK_FLAGS_INCL_LINENO)
- res += printk(KERN_CONT "%d ", descriptor->lineno);
- res += vprintk(fmt, args);
+ vaf.fmt = fmt;
+ vaf.va = &args;
+ res = printk("%s%pV", dynamic_emit_prefix(descriptor, buf), &vaf);
va_end(args);
return res;
}
EXPORT_SYMBOL(__dynamic_pr_debug);
+int __dynamic_dev_dbg(struct _ddebug *descriptor,
+ const struct device *dev, const char *fmt, ...)
+{
+ struct va_format vaf;
+ va_list args;
+ int res;
+ char buf[PREFIX_SIZE];
+
+ BUG_ON(!descriptor);
+ BUG_ON(!fmt);
+
+ va_start(args, fmt);
+ vaf.fmt = fmt;
+ vaf.va = &args;
+ res = __dev_printk(dynamic_emit_prefix(descriptor, buf), dev, &vaf);
+ va_end(args);
+
+ return res;
+}
+EXPORT_SYMBOL(__dynamic_dev_dbg);
+
+#ifdef CONFIG_NET
+
+int __dynamic_netdev_dbg(struct _ddebug *descriptor,
+ const struct net_device *dev, const char *fmt, ...)
+{
+ struct va_format vaf;
+ va_list args;
+ int res;
+ char buf[PREFIX_SIZE];
+
+ BUG_ON(!descriptor);
+ BUG_ON(!fmt);
+
+ va_start(args, fmt);
+ vaf.fmt = fmt;
+ vaf.va = &args;
+ res = __netdev_printk(dynamic_emit_prefix(descriptor, buf), dev, &vaf);
+ va_end(args);
+
+ return res;
+}
+EXPORT_SYMBOL(__dynamic_netdev_dbg);
+
+#endif
+
static __initdata char ddebug_setup_string[1024];
static __init int ddebug_setup_query(char *str)
{
if (strlen(str) >= 1024) {
- pr_warning("ddebug boot param string too large\n");
+ pr_warn("ddebug boot param string too large\n");
return 0;
}
strcpy(ddebug_setup_string, str);
@@ -487,8 +559,7 @@ static ssize_t ddebug_proc_write(struct file *file, const char __user *ubuf,
return -EFAULT;
tmpbuf[len] = '\0';
if (verbose)
- printk(KERN_INFO "%s: read %d bytes from userspace\n",
- __func__, (int)len);
+ pr_info("read %d bytes from userspace\n", (int)len);
ret = ddebug_exec_query(tmpbuf);
if (ret)
@@ -551,8 +622,7 @@ static void *ddebug_proc_start(struct seq_file *m, loff_t *pos)
int n = *pos;
if (verbose)
- printk(KERN_INFO "%s: called m=%p *pos=%lld\n",
- __func__, m, (unsigned long long)*pos);
+ pr_info("called m=%p *pos=%lld\n", m, (unsigned long long)*pos);
mutex_lock(&ddebug_lock);
@@ -577,8 +647,8 @@ static void *ddebug_proc_next(struct seq_file *m, void *p, loff_t *pos)
struct _ddebug *dp;
if (verbose)
- printk(KERN_INFO "%s: called m=%p p=%p *pos=%lld\n",
- __func__, m, p, (unsigned long long)*pos);
+ pr_info("called m=%p p=%p *pos=%lld\n",
+ m, p, (unsigned long long)*pos);
if (p == SEQ_START_TOKEN)
dp = ddebug_iter_first(iter);
@@ -601,8 +671,7 @@ static int ddebug_proc_show(struct seq_file *m, void *p)
char flagsbuf[8];
if (verbose)
- printk(KERN_INFO "%s: called m=%p p=%p\n",
- __func__, m, p);
+ pr_info("called m=%p p=%p\n", m, p);
if (p == SEQ_START_TOKEN) {
seq_puts(m,
@@ -627,8 +696,7 @@ static int ddebug_proc_show(struct seq_file *m, void *p)
static void ddebug_proc_stop(struct seq_file *m, void *p)
{
if (verbose)
- printk(KERN_INFO "%s: called m=%p p=%p\n",
- __func__, m, p);
+ pr_info("called m=%p p=%p\n", m, p);
mutex_unlock(&ddebug_lock);
}
@@ -651,7 +719,7 @@ static int ddebug_proc_open(struct inode *inode, struct file *file)
int err;
if (verbose)
- printk(KERN_INFO "%s: called\n", __func__);
+ pr_info("called\n");
iter = kzalloc(sizeof(*iter), GFP_KERNEL);
if (iter == NULL)
@@ -695,7 +763,6 @@ int ddebug_add_module(struct _ddebug *tab, unsigned int n,
}
dt->mod_name = new_name;
dt->num_ddebugs = n;
- dt->num_enabled = 0;
dt->ddebugs = tab;
mutex_lock(&ddebug_lock);
@@ -703,8 +770,7 @@ int ddebug_add_module(struct _ddebug *tab, unsigned int n,
mutex_unlock(&ddebug_lock);
if (verbose)
- printk(KERN_INFO "%u debug prints in module %s\n",
- n, dt->mod_name);
+ pr_info("%u debug prints in module %s\n", n, dt->mod_name);
return 0;
}
EXPORT_SYMBOL_GPL(ddebug_add_module);
@@ -726,8 +792,7 @@ int ddebug_remove_module(const char *mod_name)
int ret = -ENOENT;
if (verbose)
- printk(KERN_INFO "%s: removing module \"%s\"\n",
- __func__, mod_name);
+ pr_info("removing module \"%s\"\n", mod_name);
mutex_lock(&ddebug_lock);
list_for_each_entry_safe(dt, nextdt, &ddebug_tables, link) {
@@ -803,8 +868,8 @@ static int __init dynamic_debug_init(void)
if (ddebug_setup_string[0] != '\0') {
ret = ddebug_exec_query(ddebug_setup_string);
if (ret)
- pr_warning("Invalid ddebug boot param %s",
- ddebug_setup_string);
+ pr_warn("Invalid ddebug boot param %s",
+ ddebug_setup_string);
else
pr_info("ddebug initialized with string %s",
ddebug_setup_string);
diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index 70af0a7f97c..ad72a03ce5e 100644
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -282,7 +282,7 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
kobj_bcast_filter,
kobj);
/* ENOBUFS should be handled in userspace */
- if (retval == -ENOBUFS)
+ if (retval == -ENOBUFS || retval == -ESRCH)
retval = 0;
} else
retval = -ENOMEM;