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authorRalf Baechle <ralf@linux-mips.org>2006-12-12 17:14:57 +0000
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-13 09:27:08 -0800
commitec8c0446b6e2b67b5c8813eb517f4bf00efa99a9 (patch)
treee7c12d7c486c958a5e38888b41cfcd6a558f1aff /include/asm-v850
parentbcd022801ee514e28c32837f0b3ce18c775f1a7b (diff)
downloadop-kernel-dev-ec8c0446b6e2b67b5c8813eb517f4bf00efa99a9.zip
op-kernel-dev-ec8c0446b6e2b67b5c8813eb517f4bf00efa99a9.tar.gz
[PATCH] Optimize D-cache alias handling on fork
Virtually index, physically tagged cache architectures can get away without cache flushing when forking. This patch adds a new cache flushing function flush_cache_dup_mm(struct mm_struct *) which for the moment I've implemented to do the same thing on all architectures except on MIPS where it's a no-op. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-v850')
-rw-r--r--include/asm-v850/cacheflush.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-v850/cacheflush.h b/include/asm-v850/cacheflush.h
index e1a87f8..9ece05a 100644
--- a/include/asm-v850/cacheflush.h
+++ b/include/asm-v850/cacheflush.h
@@ -24,6 +24,7 @@
systems with MMUs, so we don't need them. */
#define flush_cache_all() ((void)0)
#define flush_cache_mm(mm) ((void)0)
+#define flush_cache_dup_mm(mm) ((void)0)
#define flush_cache_range(vma, start, end) ((void)0)
#define flush_cache_page(vma, vmaddr, pfn) ((void)0)
#define flush_dcache_page(page) ((void)0)
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