[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-arm26/cacheflush.h b/include/asm-arm26/cacheflush.h
index 9c1b9c7..14ae15b 100644
--- a/include/asm-arm26/cacheflush.h
+++ b/include/asm-arm26/cacheflush.h
@@ -22,6 +22,7 @@
#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_cache_vmap(start, end) do { } while (0)