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authorHeiko Carstens <heiko.carstens@de.ibm.com>2012-05-25 09:39:29 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2012-05-30 09:07:30 +0200
commitb9e3f776c811cc0647c7360844714b6a9b5fd0ef (patch)
treee6af8730518a4600e56b287e41d4df8a950a5181 /arch
parent061da3dfb291570e780169918933ba51c2b7d554 (diff)
downloadlinux-b9e3f776c811cc0647c7360844714b6a9b5fd0ef.tar.gz
s390/cpu: remove cpu "capabilities" sysfs attribute
It has been a big mistage to add the capabilities attribute to the cpus in sysfs: First the attribute only contains the cpu capability of primary cpus, which however is not necessarily (or better: unlikely) the type of cpu the kernel runs on, which is typically an IFL. In addition all information that is necessary is available in /proc/sysinfo already. So this attribute partially duplicated informations. So programs should look into the sysinfo file to retrieve all informations they are interested in. Since with this kernel release also the powersavings cpu attributes are removed this seems to be a good opportunity to remove another broken interface. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/s390/include/asm/processor.h1
-rw-r--r--arch/s390/kernel/smp.c14
-rw-r--r--arch/s390/kernel/sysinfo.c21
3 files changed, 0 insertions, 36 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 62e0d9f9a29..a6951a7e9ae 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -32,7 +32,6 @@ static inline void get_cpu_id(struct cpuid *ptr)
}
extern void s390_adjust_jiffies(void);
-extern int get_cpu_capability(unsigned int *);
extern const struct seq_operations cpuinfo_op;
extern int sysctl_ieee_emulation_warnings;
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 5c7bf24849b..15cca26ccb6 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -932,19 +932,6 @@ static struct attribute_group cpu_common_attr_group = {
.attrs = cpu_common_attrs,
};
-static ssize_t show_capability(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- unsigned int capability;
- int rc;
-
- rc = get_cpu_capability(&capability);
- if (rc)
- return rc;
- return sprintf(buf, "%u\n", capability);
-}
-static DEVICE_ATTR(capability, 0444, show_capability, NULL);
-
static ssize_t show_idle_count(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -982,7 +969,6 @@ static ssize_t show_idle_time(struct device *dev,
static DEVICE_ATTR(idle_time_us, 0444, show_idle_time, NULL);
static struct attribute *cpu_online_attrs[] = {
- &dev_attr_capability.attr,
&dev_attr_idle_count.attr,
&dev_attr_idle_time_us.attr,
NULL,
diff --git a/arch/s390/kernel/sysinfo.c b/arch/s390/kernel/sysinfo.c
index 2a94b774695..fa0eb238dac 100644
--- a/arch/s390/kernel/sysinfo.c
+++ b/arch/s390/kernel/sysinfo.c
@@ -393,27 +393,6 @@ static __init int create_proc_service_level(void)
subsys_initcall(create_proc_service_level);
/*
- * Bogomips calculation based on cpu capability.
- */
-int get_cpu_capability(unsigned int *capability)
-{
- struct sysinfo_1_2_2 *info;
- int rc;
-
- info = (void *) get_zeroed_page(GFP_KERNEL);
- if (!info)
- return -ENOMEM;
- rc = stsi(info, 1, 2, 2);
- if (rc == -ENOSYS)
- goto out;
- rc = 0;
- *capability = info->capability;
-out:
- free_page((unsigned long) info);
- return rc;
-}
-
-/*
* CPU capability might have changed. Therefore recalculate loops_per_jiffy.
*/
void s390_adjust_jiffies(void)