Merge with /pub/scm/linux/kernel/git/torvalds/linux-2.6.git

[linux-2.6-omap-h63xx.git] / include / asm-x86_64 / system.h

diff --git a/include/asm-x86_64/system.h b/include/asm-x86_64/system.h
index 38c1e8a69c9c03a91c290d3e004a0d55f85bead9..0eacbefb7dd04aede495c7832af37588df5279ef 100644 (file)
--- 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")