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| author | Andrea Arcangeli <aarcange@redhat.com> | 2011-11-02 13:37:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-02 16:06:58 -0700 |
| commit | 0693bc9ce2cc4f6a1b9c3c05790fc149a74c0b87 (patch) | |
| tree | d1d04584ca8d22546fa6c375d455d04506e8162f /arch/s390/mm | |
| parent | 220a2eb228d032acde60e9fd044ca802706ff583 (diff) | |
| download | linux-0693bc9ce2cc4f6a1b9c3c05790fc149a74c0b87.tar.gz linux-0693bc9ce2cc4f6a1b9c3c05790fc149a74c0b87.tar.bz2 linux-0693bc9ce2cc4f6a1b9c3c05790fc149a74c0b87.zip | |
s390: gup_huge_pmd() return 0 if pte changes
s390 didn't return 0 in that case, if it's rolling back the *nr pointer it
should also return zero to avoid adding pages to the array at the wrong
offset.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Hugh Dickins <hughd@google.com>
Cc: Johannes Weiner <jweiner@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/s390/mm')
| -rw-r--r-- | arch/s390/mm/gup.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/arch/s390/mm/gup.c b/arch/s390/mm/gup.c index 668dda964f20..da33a0281d9d 100644 --- a/arch/s390/mm/gup.c +++ b/arch/s390/mm/gup.c @@ -93,16 +93,17 @@ static inline int gup_huge_pmd(pmd_t *pmdp, pmd_t pmd, unsigned long addr, *nr -= refs; while (refs--) put_page(head); - } else { - /* - * Any tail page need their mapcount reference taken - * before we return. - */ - while (refs--) { - if (PageTail(tail)) - get_huge_page_tail(tail); - tail++; - } + return 0; + } + + /* + * Any tail page need their mapcount reference taken before we + * return. + */ + while (refs--) { + if (PageTail(tail)) + get_huge_page_tail(tail); + tail++; } return 1; |