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Merge branch 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull RAS fixes from Thomas Gleixner:
 "Two fixlets for RAS:

   - Export memory_error() so the NFIT module can utilize it

   - Handle memory errors in NFIT correctly"

* 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  acpi, nfit: Fix the memory error check in nfit_handle_mce()
  x86/MCE: Export memory_error()
This commit is contained in:
Linus Torvalds 2017-05-27 09:06:43 -07:00
commit de0b9d751b
3 changed files with 8 additions and 8 deletions
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1
arch/x86/include/asm/mce.h
View File

@ -266,6 +266,7 @@ static inline int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *s
#endif
int mce_available(struct cpuinfo_x86 *c);
bool mce_is_memory_error(struct mce *m);
DECLARE_PER_CPU(unsigned, mce_exception_count);
DECLARE_PER_CPU(unsigned, mce_poll_count);

13
arch/x86/kernel/cpu/mcheck/mce.c
View File

@ -499,16 +499,14 @@ static int mce_usable_address(struct mce *m)
return 1;
}
static bool memory_error(struct mce *m)
bool mce_is_memory_error(struct mce *m)
{
struct cpuinfo_x86 *c = &boot_cpu_data;
if (c->x86_vendor == X86_VENDOR_AMD) {
if (m->cpuvendor == X86_VENDOR_AMD) {
/* ErrCodeExt[20:16] */
u8 xec = (m->status >> 16) & 0x1f;
return (xec == 0x0 || xec == 0x8);
} else if (c->x86_vendor == X86_VENDOR_INTEL) {
} else if (m->cpuvendor == X86_VENDOR_INTEL) {
/*
* Intel SDM Volume 3B - 15.9.2 Compound Error Codes
*
@ -529,6 +527,7 @@ static bool memory_error(struct mce *m)
return false;
}
EXPORT_SYMBOL_GPL(mce_is_memory_error);
static bool cec_add_mce(struct mce *m)
{
@ -536,7 +535,7 @@ static bool cec_add_mce(struct mce *m)
return false;
/* We eat only correctable DRAM errors with usable addresses. */
if (memory_error(m) &&
if (mce_is_memory_error(m) &&
!(m->status & MCI_STATUS_UC) &&
mce_usable_address(m))
if (!cec_add_elem(m->addr >> PAGE_SHIFT))
@ -713,7 +712,7 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
severity = mce_severity(&m, mca_cfg.tolerant, NULL, false);
if (severity == MCE_DEFERRED_SEVERITY && memory_error(&m))
if (severity == MCE_DEFERRED_SEVERITY && mce_is_memory_error(&m))
if (m.status & MCI_STATUS_ADDRV)
m.severity = severity;

2
drivers/acpi/nfit/mce.c
View File

@ -26,7 +26,7 @@ static int nfit_handle_mce(struct notifier_block *nb, unsigned long val,
struct nfit_spa *nfit_spa;
/* We only care about memory errors */
if (!(mce->status & MCACOD))
if (!mce_is_memory_error(mce))
return NOTIFY_DONE;
/*