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| author | Andrea Arcangeli <aarcange@redhat.com> | 2012-03-28 14:42:40 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-28 17:14:35 -0700 |
| commit | 45f83cefe3a5f0476ac3f96382ebfdc3fe4caab2 (patch) | |
| tree | b2f7d3c02923d89db5a551c6a7923121db9610c4 /fs | |
| parent | 623e3db9f9b7d6e7b2a99180f9cf0825c936ab7a (diff) | |
| download | linux-45f83cefe3a5f0476ac3f96382ebfdc3fe4caab2.tar.gz | |
mm: thp: fix up pmd_trans_unstable() locations
pmd_trans_unstable() should be called before pmd_offset_map() in the locations where the mmap_sem is held for reading. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Hugh Dickins <hughd@google.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Ulrich Obergfell <uobergfe@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Mark Salter <msalter@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/proc/task_mmu.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 9694cc283511..c283832d411d 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -781,9 +781,6 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, int err = 0; pagemap_entry_t pme = make_pme(PM_NOT_PRESENT); - if (pmd_trans_unstable(pmd)) - return 0; - /* find the first VMA at or above 'addr' */ vma = find_vma(walk->mm, addr); spin_lock(&walk->mm->page_table_lock); @@ -802,6 +799,8 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, return err; } + if (pmd_trans_unstable(pmd)) + return 0; for (; addr != end; addr += PAGE_SIZE) { /* check to see if we've left 'vma' behind |