Messages in this thread | | | Date | Wed, 21 Nov 2018 16:36:37 -0800 (PST) | From | Hugh Dickins <> | Subject | Re: [PATCH v3] mm: use swp_offset as key in shmem_replace_page() |
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On Wed, 21 Nov 2018, Yu Zhao wrote:
> We changed key of swap cache tree from swp_entry_t.val to > swp_offset. Need to do so in shmem_replace_page() as well. > > Fixes: f6ab1f7f6b2d ("mm, swap: use offset of swap entry as key of swap cache") > Cc: stable@vger.kernel.org # v4.9+ > Signed-off-by: Yu Zhao <yuzhao@google.com>
Acked-by: Hugh Dickins <hughd@google.com>
Thanks!
> --- > mm/shmem.c | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/mm/shmem.c b/mm/shmem.c > index d44991ea5ed4..42b70978e814 100644 > --- a/mm/shmem.c > +++ b/mm/shmem.c > @@ -1509,11 +1509,13 @@ static int shmem_replace_page(struct page **pagep, gfp_t gfp, > { > struct page *oldpage, *newpage; > struct address_space *swap_mapping; > + swp_entry_t entry; > pgoff_t swap_index; > int error; > > oldpage = *pagep; > - swap_index = page_private(oldpage); > + entry.val = page_private(oldpage); > + swap_index = swp_offset(entry); > swap_mapping = page_mapping(oldpage); > > /* > @@ -1532,7 +1534,7 @@ static int shmem_replace_page(struct page **pagep, gfp_t gfp, > __SetPageLocked(newpage); > __SetPageSwapBacked(newpage); > SetPageUptodate(newpage); > - set_page_private(newpage, swap_index); > + set_page_private(newpage, entry.val); > SetPageSwapCache(newpage); > > /* > -- > 2.19.1.1215.g8438c0b245-goog
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