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authorCyrill Gorcunov <gorcunov@openvz.org>2014-06-05 03:06:42 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-05 03:53:56 +0400
commitb43790eedd31e9535b89bbfa45793919e9504c34 (patch)
tree0f4d6ec0924004f7fd924b2f248d9256af0807aa /mm/rmap.c
parent0bf073315cb29d2e9e68b6c5da97862a519e3320 (diff)
downloadlinux-b43790eedd31e9535b89bbfa45793919e9504c34.tar.xz
mm: softdirty: don't forget to save file map softdiry bit on unmap
pte_file_mksoft_dirty operates with argument passed by a value and returns modified result thus we need to assign @ptfile here, otherwise itis a no-op which may lead to loss of the softdirty bit. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Pavel Emelyanov <xemul@parallels.com> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/rmap.c')
-rw-r--r--mm/rmap.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/rmap.c b/mm/rmap.c
index 10aef960d3d0..7da400d5d98e 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1361,7 +1361,7 @@ static int try_to_unmap_cluster(unsigned long cursor, unsigned int *mapcount,
if (page->index != linear_page_index(vma, address)) {
pte_t ptfile = pgoff_to_pte(page->index);
if (pte_soft_dirty(pteval))
- pte_file_mksoft_dirty(ptfile);
+ ptfile = pte_file_mksoft_dirty(ptfile);
set_pte_at(mm, address, pte, ptfile);
}