diff options
Diffstat (limited to 'arch/x86/include/asm/special_insns.h')
| -rw-r--r-- | arch/x86/include/asm/special_insns.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/x86/include/asm/special_insns.h b/arch/x86/include/asm/special_insns.h index 41fc93a2e22..e820c080a4e 100644 --- a/arch/x86/include/asm/special_insns.h +++ b/arch/x86/include/asm/special_insns.h @@ -16,7 +16,7 @@ static inline void native_clts(void) * all loads stores around it, which can hurt performance. Solution is to * use a variable and mimic reads and writes to it to enforce serialization */ -static unsigned long __force_order; +extern unsigned long __force_order; static inline unsigned long native_read_cr0(void) { @@ -101,7 +101,7 @@ static inline void native_wbinvd(void) asm volatile("wbinvd": : :"memory"); } -extern void native_load_gs_index(unsigned); +extern asmlinkage void native_load_gs_index(unsigned); #ifdef CONFIG_PARAVIRT #include <asm/paravirt.h> @@ -191,6 +191,14 @@ static inline void clflush(volatile void *__p) asm volatile("clflush %0" : "+m" (*(volatile char __force *)__p)); } +static inline void clflushopt(volatile void *__p) +{ + alternative_io(".byte " __stringify(NOP_DS_PREFIX) "; clflush %P0", + ".byte 0x66; clflush %P0", + X86_FEATURE_CLFLUSHOPT, + "+m" (*(volatile char __force *)__p)); +} + #define nop() asm volatile ("nop") |