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authorOleg Nesterov <oleg@redhat.com>2013-09-11 14:20:20 -0700
committerMaciej Wereski <m.wereski@partner.samsung.com>2014-12-29 09:31:34 +0100
commit5988dd09c4983bed7c2671446de5715a63036bb3 (patch)
treed4ef3c53f6dabe86ff1b3d2898f6c02322040b42 /kernel/fork.c
parentd71cd852d88a36a25b0e8ad05a5f72f540bdd085 (diff)
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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> Change-Id: I05df8842b7c4b7e3e29b35d914f297ce37af1685 Origin: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e86867720e617774b560dfbc169b7f3d0d490950 Backported-by: Maciej Wereski <m.wereski@partner.samsung.com> Signed-off-by: Maciej Wereski <m.wereski@partner.samsung.com>
Diffstat (limited to 'kernel/fork.c')
0 files changed, 0 insertions, 0 deletions