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| author | Takashi Iwai <tiwai@suse.de> | 2010-10-11 13:45:22 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-10-11 13:45:22 +0200 |
| commit | 4e83998f5af010a928495988c586ea2926624db9 (patch) | |
| tree | e72d346172a30bbee165d7f585784724906da416 /mm/memory.c | |
| parent | dd1d3a49db4ae5c6afffadaff526b96c7993c7dd (diff) | |
| parent | d4cfa4d12f46e2520f4c1d1a92e891ce068b7464 (diff) | |
| download | kernel_samsung_smdk4412-4e83998f5af010a928495988c586ea2926624db9.zip kernel_samsung_smdk4412-4e83998f5af010a928495988c586ea2926624db9.tar.gz kernel_samsung_smdk4412-4e83998f5af010a928495988c586ea2926624db9.tar.bz2 | |
Merge branch 'fix/misc' into topic/misc
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 71b161b..0e18b4d 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)) { |