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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-10-04 22:23:26 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-10-04 22:23:30 +0100 |
| commit | a9fda02bfc91a281cd812ae15dabe6bfb9574f90 (patch) | |
| tree | d7be703f341870f15f87a59a63976f650078b4d6 /mm/memory.c | |
| parent | aa3090005d27f3c7fba915ccea36b97b669fa3ab (diff) | |
| parent | ec706dab290c486837d4a825870ab052bf200279 (diff) | |
Merge branch 'for_rmk' of git://git.linaro.org/kernel/linux-linaro-next into devel-stable
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/mm/memory.c b/mm/memory.c index 71b161b73bb5..0e18b4d649ec 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -2680,10 +2680,12 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma, delayacct_clear_flag(DELAYACCT_PF_SWAPIN); /* - * Make sure try_to_free_swap didn't release the swapcache - * from under us. The page pin isn't enough to prevent that. + * Make sure try_to_free_swap or reuse_swap_page or swapoff did not + * release the swapcache from under us. The page pin, and pte_same + * test below, are not enough to exclude that. Even if it is still + * swapcache, we need to check that the page's swap has not changed. */ - if (unlikely(!PageSwapCache(page))) + if (unlikely(!PageSwapCache(page) || page_private(page) != entry.val)) goto out_page; if (ksm_might_need_to_copy(page, vma, address)) { |