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mce, edac: Use an atomic notifier for MCEs decoding

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Add an atomic notifier which ensures proper locking when conveying
MCE info to EDAC for decoding. The actual notifier call overrides a
default, negative priority notifier.

Note: make sure we register the default decoder only once since
mcheck_init() runs on each CPU.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
LKML-Reference: <20091003065752.GA8935@liondog.tnic>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Borislav Petkov
2009-10-07 13:20:38 +02:00
committed by Ingo Molnar
parent d93a8f829f
commit fb2531953f
3 changed files with 34 additions and 19 deletions
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3
arch/x86/include/asm/mce.h
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@ -108,6 +108,8 @@ struct mce_log {
#define K8_MCE_THRESHOLD_BANK_5 (MCE_THRESHOLD_BASE + 5 * 9)
#define K8_MCE_THRESHOLD_DRAM_ECC (MCE_THRESHOLD_BANK_4 + 0)
extern struct atomic_notifier_head x86_mce_decoder_chain;
#ifdef __KERNEL__
#include <linux/percpu.h>
@ -213,6 +215,5 @@ extern void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu);
void intel_init_thermal(struct cpuinfo_x86 *c);
void mce_log_therm_throt_event(__u64 status);
#endif /* __KERNEL__ */
#endif /* _ASM_X86_MCE_H */