From: Greg Kroah-Hartman Date: Thu, 26 Jan 2012 15:49:14 -0800 Subject: x86/mce: Convert static array of pointers to per-cpu variables commit d6126ef5f31ca54980cb067af659a360dfcca037 upstream. When I previously fixed up the mce_device code, I used a static array of the pointers. It was (rightfully) pointed out to me that I should be using the per_cpu code instead. This patch converts the code over to that structure, moving the variable back into the per_cpu area, like it used to be for 3.2 and earlier. Signed-off-by: Greg Kroah-Hartman Reviewed-by: Srivatsa S. Bhat Link: https://lkml.org/lkml/2012/1/27/165 Signed-off-by: Tony Luck --- arch/x86/include/asm/mce.h | 2 +- arch/x86/kernel/cpu/mcheck/mce.c | 8 ++++---- arch/x86/kernel/cpu/mcheck/mce_amd.c | 9 +++++---- 3 files changed, 10 insertions(+), 9 deletions(-) diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h index 6aefb14..441520e 100644 --- a/arch/x86/include/asm/mce.h +++ b/arch/x86/include/asm/mce.h @@ -151,7 +151,7 @@ static inline void enable_p5_mce(void) {} void mce_setup(struct mce *m); void mce_log(struct mce *m); -extern struct device *mce_device[CONFIG_NR_CPUS]; +DECLARE_PER_CPU(struct device *, mce_device); /* * Maximum banks number. diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index 5a11ae2..4979a5d 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -1859,7 +1859,7 @@ static struct bus_type mce_subsys = { .dev_name = "machinecheck", }; -struct device *mce_device[CONFIG_NR_CPUS]; +DEFINE_PER_CPU(struct device *, mce_device); __cpuinitdata void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu); @@ -2038,7 +2038,7 @@ static __cpuinit int mce_device_create(unsigned int cpu) goto error2; } cpumask_set_cpu(cpu, mce_device_initialized); - mce_device[cpu] = dev; + per_cpu(mce_device, cpu) = dev; return 0; error2: @@ -2055,7 +2055,7 @@ error: static __cpuinit void mce_device_remove(unsigned int cpu) { - struct device *dev = mce_device[cpu]; + struct device *dev = per_cpu(mce_device, cpu); int i; if (!cpumask_test_cpu(cpu, mce_device_initialized)) @@ -2069,7 +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; + per_cpu(mce_device, cpu) = NULL; } /* Make sure there are no machine checks on offlined CPUs. */ diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c index 786e76a..a4bf9d2 100644 --- a/arch/x86/kernel/cpu/mcheck/mce_amd.c +++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c @@ -523,7 +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]; + struct device *dev = per_cpu(mce_device, cpu); char name[32]; sprintf(name, "threshold_bank%i", bank); @@ -585,7 +585,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank) if (i == cpu) continue; - dev = mce_device[i]; + dev = per_cpu(mce_device, i); if (dev) err = sysfs_create_link(&dev->kobj,b->kobj, name); if (err) @@ -665,7 +665,8 @@ 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(&mce_device[cpu]->kobj, name); + dev = per_cpu(mce_device, cpu); + sysfs_remove_link(&dev->kobj, name); per_cpu(threshold_banks, cpu)[bank] = NULL; return; @@ -677,7 +678,7 @@ static void threshold_remove_bank(unsigned int cpu, int bank) if (i == cpu) continue; - dev = mce_device[i]; + dev = per_cpu(mce_device, i); if (dev) sysfs_remove_link(&dev->kobj, name); per_cpu(threshold_banks, i)[bank] = NULL;