diff options
Diffstat (limited to 'include/asm-x86_64/system.h')
| -rw-r--r-- | include/asm-x86_64/system.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/asm-x86_64/system.h b/include/asm-x86_64/system.h index 38c1e8a69c9..0eacbefb7dd 100644 --- a/include/asm-x86_64/system.h +++ b/include/asm-x86_64/system.h @@ -193,6 +193,15 @@ static inline void write_cr4(unsigned long val) #define wbinvd() \ __asm__ __volatile__ ("wbinvd": : :"memory"); +/* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible. + */ +static inline void sched_cacheflush(void) +{ + wbinvd(); +} + #endif /* __KERNEL__ */ #define nop() __asm__ __volatile__ ("nop") |