[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>
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)