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authorRalf Baechle <ralf@linux-mips.org>2006-12-12 12:14:57 -0500
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-13 12:27:08 -0500
commitec8c0446b6e2b67b5c8813eb517f4bf00efa99a9 (patch)
treee7c12d7c486c958a5e38888b41cfcd6a558f1aff /include/asm-m68knommu
parentbcd022801ee514e28c32837f0b3ce18c775f1a7b (diff)
[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-m68knommu')
-rw-r--r--include/asm-m68knommu/cacheflush.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-m68knommu/cacheflush.h b/include/asm-m68knommu/cacheflush.h
index c3aadf3b0d88..163dcb1a9689 100644
--- a/include/asm-m68knommu/cacheflush.h
+++ b/include/asm-m68knommu/cacheflush.h
@@ -8,6 +8,7 @@
8 8
9#define flush_cache_all() __flush_cache_all() 9#define flush_cache_all() __flush_cache_all()
10#define flush_cache_mm(mm) do { } while (0) 10#define flush_cache_mm(mm) do { } while (0)
11#define flush_cache_dup_mm(mm) do { } while (0)
11#define flush_cache_range(vma, start, end) __flush_cache_all() 12#define flush_cache_range(vma, start, end) __flush_cache_all()
12#define flush_cache_page(vma, vmaddr) do { } while (0) 13#define flush_cache_page(vma, vmaddr) do { } while (0)
13#define flush_dcache_range(start,len) __flush_cache_all() 14#define flush_dcache_range(start,len) __flush_cache_all()