From 4dc7a0bbeb6882ad665e588e82fabe5bb4645f2f Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Thu, 12 Jan 2006 01:05:27 -0800
Subject: [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>
---
 include/asm-mips/system.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'include/asm-mips')

diff --git a/include/asm-mips/system.h b/include/asm-mips/system.h
index 330c4e497af3..5f761ad5a8d9 100644
--- a/include/asm-mips/system.h
+++ b/include/asm-mips/system.h
@@ -164,6 +164,16 @@ do {									\
 		__restore_dsp(current);					\
 } while(0)
 
+/*
+ * 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)
+{
+}
+
 static inline unsigned long __xchg_u32(volatile int * m, unsigned int val)
 {
 	__u32 retval;
-- 
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