mm: thp: check pmd_trans_unstable() after split_huge_pmd()
authorNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Tue, 26 Jul 2016 22:24:03 +0000 (15:24 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 26 Jul 2016 23:19:19 +0000 (16:19 -0700)
commit337d9abf1cd1a59645d91b6d0b1685a476b81978
treeaace71b1608dfbde1c4c35bd03cbdac60fe1f64a
parente3a2713c3cfa9c41fac57447533079d8da23319b
mm: thp: check pmd_trans_unstable() after split_huge_pmd()

split_huge_pmd() doesn't guarantee that the pmd is normal pmd pointing
to pte entries, which can be checked with pmd_trans_unstable().  Some
callers make this assertion and some do it differently and some not, so
let's do it in a unified manner.

Link: http://lkml.kernel.org/r/1464741400-12143-1-git-send-email-n-horiguchi@ah.jp.nec.com
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Hugh Dickins <hughd@google.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/gup.c
mm/mempolicy.c
mm/mprotect.c
mm/mremap.c