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authorMichael S. Tsirkin <mst@mellanox.co.il>2006-02-15 15:17:39 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-15 15:32:22 -0800
commit5f6164f3092832e0d9b12eed52e09a76bf39c64a (patch)
tree507043c3eafa00ad7241f1102c860e486f8dc544 /include/asm-generic/mman.h
parent06fed33849c13af637c4d09e9ba27828fac9edd5 (diff)
downloadlwn-5f6164f3092832e0d9b12eed52e09a76bf39c64a.tar.gz
lwn-5f6164f3092832e0d9b12eed52e09a76bf39c64a.zip
[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>
Diffstat (limited to 'include/asm-generic/mman.h')
-rw-r--r--include/asm-generic/mman.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/include/asm-generic/mman.h b/include/asm-generic/mman.h
new file mode 100644
index 000000000000..3b41d2bb70da
--- /dev/null
+++ b/include/asm-generic/mman.h
@@ -0,0 +1,42 @@
+#ifndef _ASM_GENERIC_MMAN_H
+#define _ASM_GENERIC_MMAN_H
+
+/*
+ Author: Michael S. Tsirkin <mst@mellanox.co.il>, Mellanox Technologies Ltd.
+ Based on: asm-xxx/mman.h
+*/
+
+#define PROT_READ 0x1 /* page can be read */
+#define PROT_WRITE 0x2 /* page can be written */
+#define PROT_EXEC 0x4 /* page can be executed */
+#define PROT_SEM 0x8 /* page may be used for atomic ops */
+#define PROT_NONE 0x0 /* page can not be accessed */
+#define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */
+#define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */
+
+#define MAP_SHARED 0x01 /* Share changes */
+#define MAP_PRIVATE 0x02 /* Changes are private */
+#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 */
+
+#define MS_ASYNC 1 /* sync memory asynchronously */
+#define MS_INVALIDATE 2 /* invalidate the caches */
+#define MS_SYNC 4 /* synchronous memory sync */
+
+#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
+
+#endif