[PATCH] add asm-generic/mman.h

Make new MADV_REMOVE, MADV_DONTFORK, MADV_DOFORK consistent across all
arches.  The idea is to make it possible to use them portably even before
distros include them in libc headers.

Move common flags to asm-generic/mman.h

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Cc: Roland Dreier <rolandd@cisco.com>
Cc: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 12 insertions, 10 deletions

diff --git a/include/asm-xtensa/mman.h b/include/asm-xtensa/mman.h
index e2d7afb679c8..ba394cbb4807 100644
--- a/include/asm-xtensa/mman.h
+++ b/include/asm-xtensa/mman.h
@@ -67,17 +67,19 @@
 #define MCL_CURRENT     1               /* lock all current mappings */
 #define MCL_FUTURE      2               /* lock all future mappings */
 
-#define MADV_NORMAL     0x0             /* default page-in behavior */
-#define MADV_RANDOM     0x1             /* page-in minimum required */
-#define MADV_SEQUENTIAL 0x2             /* read-ahead aggressively */
-#define MADV_WILLNEED   0x3             /* pre-fault pages */
-#define MADV_DONTNEED   0x4             /* discard these pages */
-#define MADV_REMOVE     0x5             /* remove these pages & resources */
-#define MADV_DONTFORK   0x30            /* dont inherit across fork */
-#define MADV_DOFORK     0x31            /* do inherit across fork */
+#define MADV_NORMAL     0               /* no further special treatment */
+#define MADV_RANDOM     1               /* expect random page references */
+#define MADV_SEQUENTIAL 2               /* expect sequential page references */
+#define MADV_WILLNEED   3               /* will need these pages */
+#define MADV_DONTNEED   4               /* don't need these pages */
+
+/* common parameters: try to keep these consistent across architectures */
+#define MADV_REMOVE     9               /* remove these pages & resources */
+#define MADV_DONTFORK   10              /* don't inherit across fork */
+#define MADV_DOFORK     11              /* do inherit across fork */
 
 /* compatibility flags */
-#define MAP_ANON       MAP_ANONYMOUS
-#define MAP_FILE       0
+#define MAP_ANON        MAP_ANONYMOUS
+#define MAP_FILE        0
 
 #endif /* _XTENSA_MMAN_H */