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authorIngo Molnar <mingo@elte.hu>2006-01-12 01:05:27 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-12 09:08:49 -0800
commit4dc7a0bbeb6882ad665e588e82fabe5bb4645f2f (patch)
tree8c034f802157d7f449e76f45086c0e13e0ea4711 /include/asm-i386
parentc6b44d10f25e5a93eca5135b686a35775c63546e (diff)
[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>
Diffstat (limited to 'include/asm-i386')
-rw-r--r--include/asm-i386/system.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/asm-i386/system.h b/include/asm-i386/system.h
index 9c0593b7a94..36a92ed6a9d 100644
--- a/include/asm-i386/system.h
+++ b/include/asm-i386/system.h
@@ -548,6 +548,15 @@ void enable_hlt(void);
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