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| author |   Ralf Baechle <ralf@linux-mips.org> | 2006-12-12 17:14:57 +0000 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-13 09:27:08 -0800 |
| commit | ec8c0446b6e2b67b5c8813eb517f4bf00efa99a9 (patch) | |
| tree | e7c12d7c486c958a5e38888b41cfcd6a558f1aff /include/asm-sh/cpu-sh3 | |
| parent | [PATCH] MIPS: Fix COW D-cache aliasing on fork (diff) | |
| download | linux-dev-ec8c0446b6e2b67b5c8813eb517f4bf00efa99a9.tar.xz linux-dev-ec8c0446b6e2b67b5c8813eb517f4bf00efa99a9.zip | |
[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-sh/cpu-sh3')
| -rw-r--r-- | include/asm-sh/cpu-sh3/cacheflush.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/asm-sh/cpu-sh3/cacheflush.h b/include/asm-sh/cpu-sh3/cacheflush.h index 03fde97a7fd0..f70d8ef76a15 100644 --- a/include/asm-sh/cpu-sh3/cacheflush.h +++ b/include/asm-sh/cpu-sh3/cacheflush.h @@ -15,6 +15,7 @@ * * - flush_cache_all() flushes entire cache * - flush_cache_mm(mm) flushes the specified mm context's cache lines + * - flush_cache_dup mm(mm) handles cache flushing when forking * - flush_cache_page(mm, vmaddr, pfn) flushes a single page * - flush_cache_range(vma, start, end) flushes a range of pages * @@ -39,6 +40,7 @@ void flush_cache_all(void); void flush_cache_mm(struct mm_struct *mm); +#define flush_cache_dup_mm(mm) flush_cache_mm(mm) void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end); void flush_cache_page(struct vm_area_struct *vma, unsigned long addr, unsigned long pfn); @@ -48,6 +50,7 @@ void flush_icache_page(struct vm_area_struct *vma, struct page *page); #else #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_range(vma, start, end) do { } while (0) #define flush_cache_page(vma, vmaddr, pfn) do { } while (0) #define flush_dcache_page(page) do { } while (0) |