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authorIngo Molnar <mingo@elte.hu>2006-01-12 10:05:27 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-12 18:08:49 +0100
commit4dc7a0bbeb6882ad665e588e82fabe5bb4645f2f (patch)
tree8c034f802157d7f449e76f45086c0e13e0ea4711 /include/asm-alpha
parent[PATCH] Implement ioctl emulation for the parport character device (diff)
downloadlinux-4dc7a0bbeb6882ad665e588e82fabe5bb4645f2f.tar.xz
linux-4dc7a0bbeb6882ad665e588e82fabe5bb4645f2f.zip
[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-alpha')
-rw-r--r--include/asm-alpha/system.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/asm-alpha/system.h b/include/asm-alpha/system.h
index 050e86d12891..766ab868e8ab 100644
--- a/include/asm-alpha/system.h
+++ b/include/asm-alpha/system.h
@@ -140,6 +140,16 @@ extern void halt(void) __attribute__((noreturn));
struct task_struct;
extern struct task_struct *alpha_switch_to(unsigned long, struct task_struct*);
+/*
+ * 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.
+ *
+ * TODO: fill this in!
+ */
+static inline void sched_cacheflush(void)
+{
+}
+
#define imb() \
__asm__ __volatile__ ("call_pal %0 #imb" : : "i" (PAL_imb) : "memory")