From ec8c0446b6e2b67b5c8813eb517f4bf00efa99a9 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Tue, 12 Dec 2006 17:14:57 +0000 Subject: [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 Signed-off-by: Linus Torvalds --- include/asm-xtensa/cacheflush.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/asm-xtensa/cacheflush.h') diff --git a/include/asm-xtensa/cacheflush.h b/include/asm-xtensa/cacheflush.h index 337765b629de..22ef901b7845 100644 --- a/include/asm-xtensa/cacheflush.h +++ b/include/asm-xtensa/cacheflush.h @@ -75,6 +75,7 @@ extern void __flush_invalidate_dcache_range(unsigned long, unsigned long); #define flush_cache_all() __flush_invalidate_cache_all(); #define flush_cache_mm(mm) __flush_invalidate_cache_all(); +#define flush_cache_dup_mm(mm) __flush_invalidate_cache_all(); #define flush_cache_vmap(start,end) __flush_invalidate_cache_all(); #define flush_cache_vunmap(start,end) __flush_invalidate_cache_all(); @@ -88,6 +89,7 @@ extern void flush_cache_page(struct vm_area_struct*, unsigned long, unsigned lon #define flush_cache_all() do { } while (0) #define flush_cache_mm(mm) do { } while (0) +#define flush_cache_dup_mm(mm) do { } while (0) #define flush_cache_vmap(start,end) do { } while (0) #define flush_cache_vunmap(start,end) do { } while (0) -- cgit v1.2.2