| commit | ed5297a94090d9a9f27b0ce1f9601ebe73561cff | |
| author | Hugh Dickins <hugh@veritas.com> | |
| Tue, 22 Nov 2005 05:32:11 +0000 (21 21:32 -0800) | ||
| committer | Linus Torvalds <torvalds@g5.osdl.org> | |
| Tue, 22 Nov 2005 17:13:41 +0000 (22 09:13 -0800) | ||
| tree | 00d28144ae949b3f9d566279cb12be0c802f86e6 | treesnapshot (tar.gz zip) |
| parent | aa1a64ee12ae130706f3fc0007841ce9b0ddf9c2 | commitdiff |
[PATCH] unpaged: get_user_pages VM_RESERVED
The PageReserved removal in 2.6.15-rc1 prohibited get_user_pages on the areas
flagged VM_RESERVED in place of PageReserved. That is correct in theory - we
ought not to interfere with struct pages in such a reserved area; but in
practice it broke BTTV for one.
So revert to prohibiting only on VM_IO: if someone gets into trouble with
get_user_pages on VM_RESERVED, it'll just be a "don't do that".
You can argue that videobuf_mmap_mapper shouldn't set VM_RESERVED in the first
place, but now's not the time for breaking drivers without notice.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
The PageReserved removal in 2.6.15-rc1 prohibited get_user_pages on the areas
flagged VM_RESERVED in place of PageReserved. That is correct in theory - we
ought not to interfere with struct pages in such a reserved area; but in
practice it broke BTTV for one.
So revert to prohibiting only on VM_IO: if someone gets into trouble with
get_user_pages on VM_RESERVED, it'll just be a "don't do that".
You can argue that videobuf_mmap_mapper shouldn't set VM_RESERVED in the first
place, but now's not the time for breaking drivers without notice.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| mm/memory.c | diffblobblamehistory |