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| author | Dan Williams <dan.j.williams@intel.com> | 2016-03-08 19:30:19 +0100 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2016-03-29 02:19:31 +0200 |
| commit | fc0c2028135c7f75fce36b90e44efb8003a9173b (patch) | |
| tree | 8fdb218033326310e36d0de2fa89293a0d72d0b3 /arch/x86 | |
| parent | Linux 4.6-rc1 (diff) | |
| download | linux-fc0c2028135c7f75fce36b90e44efb8003a9173b.tar.xz linux-fc0c2028135c7f75fce36b90e44efb8003a9173b.zip | |
x86, pmem: use memcpy_mcsafe() for memcpy_from_pmem()
Update the definition of memcpy_from_pmem() to return 0 or a negative
error code. Implement x86/arch_memcpy_from_pmem() with memcpy_mcsafe().
Cc: Borislav Petkov <bp@alien8.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/pmem.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pmem.h b/arch/x86/include/asm/pmem.h index bf8b35d2035a..fbc5e92e1ecc 100644 --- a/arch/x86/include/asm/pmem.h +++ b/arch/x86/include/asm/pmem.h @@ -47,6 +47,15 @@ static inline void arch_memcpy_to_pmem(void __pmem *dst, const void *src, BUG(); } +static inline int arch_memcpy_from_pmem(void *dst, const void __pmem *src, + size_t n) +{ + if (static_cpu_has(X86_FEATURE_MCE_RECOVERY)) + return memcpy_mcsafe(dst, (void __force *) src, n); + memcpy(dst, (void __force *) src, n); + return 0; +} + /** * arch_wmb_pmem - synchronize writes to persistent memory * |