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Add lfence().

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MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2012-08-01 17:24:53 +00:00
parent 879eedbc7b
commit 0220d04fe3
2 changed files with 14 additions and 0 deletions
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7
sys/amd64/include/cpufunc.h
View File

@ -289,6 +289,13 @@ popcntq(u_long mask)
return (result); return (result);
} }
static __inline void
lfence(void)
{
__asm __volatile("lfence" : : : "memory");
}
static __inline void static __inline void
mfence(void) mfence(void)
{ {

7
sys/i386/include/cpufunc.h
View File

@ -154,6 +154,13 @@ cpu_mwait(u_long extensions, u_int hints)
__asm __volatile("mwait" : : "a" (hints), "c" (extensions)); __asm __volatile("mwait" : : "a" (hints), "c" (extensions));
} }
static __inline void
lfence(void)
{
__asm __volatile("lfence" : : : "memory");
}
static __inline void static __inline void
mfence(void) mfence(void)
{ {