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author | Oleg Nesterov <oleg@redhat.com> | 2013-09-11 14:20:20 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-11 15:57:07 -0700 |
commit | e86867720e617774b560dfbc169b7f3d0d490950 (patch) | |
tree | b28f617ed448da3906131b9a67def196e0ce76c4 /mm/zswap.c | |
parent | 077bf22b5cf233863826afbfa4af9b18650a832d (diff) | |
download | linux-stable-e86867720e617774b560dfbc169b7f3d0d490950.tar.gz linux-stable-e86867720e617774b560dfbc169b7f3d0d490950.tar.bz2 linux-stable-e86867720e617774b560dfbc169b7f3d0d490950.zip |
mm: mmap_region: kill correct_wcount/inode, use allow_write_access()
correct_wcount and inode in mmap_region() just complicate the code. This
boolean was needed previously, when deny_write_access() was called before
vma_merge(), now we can simply check VM_DENYWRITE and do
allow_write_access() if it is set.
allow_write_access() checks file != NULL, so this is safe even if it was
possible to use VM_DENYWRITE && !file. Just we need to ensure we use the
same file which was deny_write_access()'ed, so the patch also moves "file
= vma->vm_file" down after allow_write_access().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Colin Cross <ccross@android.com>
Cc: David Rientjes <rientjes@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/zswap.c')
0 files changed, 0 insertions, 0 deletions