29 Apr
2015
29 Apr
'15
7:19 a.m.
On Wed, Apr 29, 2015 at 10:25 AM, Simon Glass sjg@chromium.org wrote:
Provide access to this x86 instruction from C code.
Signed-off-by: Simon Glass sjg@chromium.org
Changes in v2:
- Remove unnecessary \t\n after mfence assembler instruction
arch/x86/include/asm/cpu.h | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h index c839291..08284ee 100644 --- a/arch/x86/include/asm/cpu.h +++ b/arch/x86/include/asm/cpu.h @@ -151,6 +151,11 @@ static inline int flag_is_changeable_p(uint32_t flag) return ((f1^f2) & flag) != 0; }
+static inline void mfence(void) +{
__asm__ __volatile__("mfence" : : : "memory");+}
/**
- cpu_enable_paging_pae() - Enable PAE-paging
--
Reviewed-by: Bin Meng bmeng.cn@gmail.com