diff options
| author | Christoph Hellwig <hch@lst.de> | 2019-07-17 01:26:27 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-17 04:23:21 +0200 |
| commit | 0bf5f9492389aa8df5c8e38fcb4488802d24504d (patch) | |
| tree | 9c62b75ac595ca7dd1c0e25261c9a1ad08fb69f0 /include/uapi | |
| parent | mm/cma.c: fail if fixed declaration can't be honored (diff) | |
| download | linux-0bf5f9492389aa8df5c8e38fcb4488802d24504d.tar.xz linux-0bf5f9492389aa8df5c8e38fcb4488802d24504d.zip | |
mm: fix the MAP_UNINITIALIZED flag
We can't expose UAPI symbols differently based on CONFIG_ symbols, as
userspace won't have them available. Instead always define the flag,
but only respect it based on the config option.
Link: http://lkml.kernel.org/r/20190703122359.18200-2-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/asm-generic/mman-common.h | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/include/uapi/asm-generic/mman-common.h b/include/uapi/asm-generic/mman-common.h index abd238d0f7a4..cb556b430e71 100644 --- a/include/uapi/asm-generic/mman-common.h +++ b/include/uapi/asm-generic/mman-common.h @@ -19,15 +19,13 @@ #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 /* 0x0100 - 0x80000 flags are defined in asm-generic/mman.h */ #define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */ +#define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could be + * uninitialized */ + /* * Flags for mlock */ |