tree e2e790fb6b86e118757b4c9124323b5fcaf6c102
parent f0093ede9b726ccb1876d43574f5b45c79940aca
author Cyrill Gorcunov <gorcunov@gmail.com> 1407366425 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1407373280 -0700

mm/memory.c: don't forget to set softdirty on file mapped fault

Otherwise we may not notice that pte was softdirty because
pte_mksoft_dirty helper _returns_ new pte but doesn't modify the
argument.

In case if page fault happend on dirty filemapping the newly created pte
may loose softdirty bit thus if a userspace program is tracking memory
changes with help of a memory tracker (CONFIG_MEM_SOFT_DIRTY) it might
miss modification of a memory page (which in worts case may lead to data
inconsistency).

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>