diff options
Diffstat (limited to 'include/asm-x86')
| -rw-r--r-- | include/asm-x86/system.h | 11 |
1 files changed, 1 insertions, 10 deletions
diff --git a/include/asm-x86/system.h b/include/asm-x86/system.h index 9cff02ffe6c..428d9471497 100644 --- a/include/asm-x86/system.h +++ b/include/asm-x86/system.h @@ -296,16 +296,7 @@ void default_idle(void); */ #ifdef CONFIG_X86_32 /* - * For now, "wmb()" doesn't actually do anything, as all - * Intel CPU's follow what Intel calls a *Processor Order*, - * in which all writes are seen in the program order even - * outside the CPU. - * - * I expect future Intel CPU's to have a weaker ordering, - * but I'd also expect them to finally get their act together - * and add some real memory barriers if so. - * - * Some non intel clones support out of order store. wmb() ceases to be a + * Some non-Intel clones support out of order store. wmb() ceases to be a * nop for these. */ #define mb() alternative("lock; addl $0,0(%%esp)", "mfence", X86_FEATURE_XMM2) |