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mce: fix warning messages about static struct mce_device 

When suspending, there was a large list of warnings going something like:

	Device 'machinecheck1' does not have a release() function, it is broken and must be fixed

This patch turns the static mce_devices into dynamically allocated, and
properly frees them when they are removed from the system.  It solves
the warning messages on my laptop here.

Reported-by: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Tested-by: Djalal Harouni <tixxdz@opendz.org>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Borislav Petkov <bp@amd64.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Greg Kroah-Hartman 2012-01-16 14:40:28 -08:00 committed by Linus Torvalds
parent 5b3fcfed35
commit e032d80774
3 changed files with 26 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/include/asm/mce.h
View File

@ -151,7 +151,7 @@ static inline void enable_p5_mce(void) {}
void mce_setup(struct mce *m);
void mce_log(struct mce *m);
DECLARE_PER_CPU(struct device, mce_device);
extern struct device *mce_device[CONFIG_NR_CPUS];
/*
* Maximum banks number.

18
arch/x86/kernel/cpu/mcheck/mce.c
View File

@ -1859,7 +1859,7 @@ static struct bus_type mce_subsys = {
.dev_name = "machinecheck",
};
DEFINE_PER_CPU(struct device, mce_device);
struct device *mce_device[CONFIG_NR_CPUS];
__cpuinitdata
void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu);
@ -2001,19 +2001,27 @@ static struct device_attribute *mce_device_attrs[] = {
static cpumask_var_t mce_device_initialized;
static void mce_device_release(struct device *dev)
{
kfree(dev);
}
/* Per cpu device init. All of the cpus still share the same ctrl bank: */
static __cpuinit int mce_device_create(unsigned int cpu)
{
struct device *dev = &per_cpu(mce_device, cpu);
struct device *dev;
int err;
int i, j;
if (!mce_available(&boot_cpu_data))
return -EIO;
memset(dev, 0, sizeof(struct device));
dev = kzalloc(sizeof *dev, GFP_KERNEL);
if (!dev)
return -ENOMEM;
dev->id = cpu;
dev->bus = &mce_subsys;
dev->release = &mce_device_release;
err = device_register(dev);
if (err)
@ -2030,6 +2038,7 @@ static __cpuinit int mce_device_create(unsigned int cpu)
goto error2;
}
cpumask_set_cpu(cpu, mce_device_initialized);
mce_device[cpu] = dev;
return 0;
error2:
@ -2046,7 +2055,7 @@ error:
static __cpuinit void mce_device_remove(unsigned int cpu)
{
struct device *dev = &per_cpu(mce_device, cpu);
struct device *dev = mce_device[cpu];
int i;
if (!cpumask_test_cpu(cpu, mce_device_initialized))
@ -2060,6 +2069,7 @@ static __cpuinit void mce_device_remove(unsigned int cpu)
device_unregister(dev);
cpumask_clear_cpu(cpu, mce_device_initialized);
mce_device[cpu] = NULL;
}
/* Make sure there are no machine checks on offlined CPUs. */

18
arch/x86/kernel/cpu/mcheck/mce_amd.c
View File

@ -523,6 +523,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
{
int i, err = 0;
struct threshold_bank *b = NULL;
struct device *dev = mce_device[cpu];
char name[32];
sprintf(name, "threshold_bank%i", bank);
@ -543,8 +544,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
if (!b)
goto out;
err = sysfs_create_link(&per_cpu(mce_device, cpu).kobj,
b->kobj, name);
err = sysfs_create_link(&dev->kobj, b->kobj, name);
if (err)
goto out;
@ -565,7 +565,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
goto out;
}
b->kobj = kobject_create_and_add(name, &per_cpu(mce_device, cpu).kobj);
b->kobj = kobject_create_and_add(name, &dev->kobj);
if (!b->kobj)
goto out_free;
@ -585,8 +585,9 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
if (i == cpu)
continue;
err = sysfs_create_link(&per_cpu(mce_device, i).kobj,
b->kobj, name);
dev = mce_device[i];
if (dev)
err = sysfs_create_link(&dev->kobj,b->kobj, name);
if (err)
goto out;
@ -649,6 +650,7 @@ static void deallocate_threshold_block(unsigned int cpu,
static void threshold_remove_bank(unsigned int cpu, int bank)
{
struct threshold_bank *b;
struct device *dev;
char name[32];
int i = 0;
@ -663,7 +665,7 @@ static void threshold_remove_bank(unsigned int cpu, int bank)
#ifdef CONFIG_SMP
/* sibling symlink */
if (shared_bank[bank] && b->blocks->cpu != cpu) {
sysfs_remove_link(&per_cpu(mce_device, cpu).kobj, name);
sysfs_remove_link(&mce_device[cpu]->kobj, name);
per_cpu(threshold_banks, cpu)[bank] = NULL;
return;
@ -675,7 +677,9 @@ static void threshold_remove_bank(unsigned int cpu, int bank)
if (i == cpu)
continue;
sysfs_remove_link(&per_cpu(mce_device, i).kobj, name);
dev = mce_device[i];
if (dev)
sysfs_remove_link(&dev->kobj, name);
per_cpu(threshold_banks, i)[bank] = NULL;
}