nommu: fix malloc performance by adding uninitialized flag

[sfrench/cifs-2.6.git] / include / asm-generic / mman-common.h

diff --git a/include/asm-generic/mman-common.h b/include/asm-generic/mman-common.h
index 5ee13b2fd223599422446b509227eadb24b7f7e8..20111265afd80a6cbc5a65d057f5100aa7dac69f 100644 (file)
--- a/include/asm-generic/mman-common.h
+++ b/include/asm-generic/mman-common.h
@@ -19,6 +19,11 @@
 #define MAP_TYPE       0x0f            /* Mask for type of mapping */
 #define MAP_FIXED      0x10            /* Interpret addr exactly */
 #define MAP_ANONYMOUS  0x20            /* don't use a file */
+#ifdef CONFIG_MMAP_ALLOW_UNINITIALIZED
+# define MAP_UNINITIALIZED 0x4000000   /* For anonymous mmap, memory could be uninitialized */
+#else
+# define MAP_UNINITIALIZED 0x0         /* Don't support this flag */
+#endif
 
 #define MS_ASYNC       1               /* sync memory asynchronously */
 #define MS_INVALIDATE  2               /* invalidate the caches */