[PATCH] sched: add cacheflush() asm
Add per-arch sched_cacheflush() which is a write-back cacheflush used by
the migration-cost calibration code at bootup time.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-i386/system.h b/include/asm-i386/system.h
index 9c0593b..36a92ed 100644
--- a/include/asm-i386/system.h
+++ b/include/asm-i386/system.h
@@ -548,6 +548,15 @@
extern int es7000_plat;
void cpu_idle_wait(void);
+/*
+ * 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();
+}
+
extern unsigned long arch_align_stack(unsigned long sp);
#endif