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| author | D. Andrei Măceș <dmaces@nd.edu> | 2015-09-30 15:18:37 -0400 |
|---|---|---|
| committer | Ziyan <jaraidaniel@gmail.com> | 2016-01-05 18:22:03 +0100 |
| commit | 64b0846cb9ee3b170fa68611394adcb53b8a6761 (patch) | |
| tree | fbdef905c917ab7e2d7b283be9a3637fe8aa3ad1 /mm | |
| parent | 226ce8db027f873adf49dc557efa14a32e2835b1 (diff) | |
| download | kernel_samsung_tuna-64b0846cb9ee3b170fa68611394adcb53b8a6761.tar.gz kernel_samsung_tuna-64b0846cb9ee3b170fa68611394adcb53b8a6761.tar.bz2 kernel_samsung_tuna-64b0846cb9ee3b170fa68611394adcb53b8a6761.zip | |
mm: Need page_swap_info() helper method from upstream
Stolen from commit f981c5950fa85916ba49bea5d9a7a5078f47e569:
"mm: methods for teaching filesystems about PG_swapcache pages"
Change-Id: I6673913f9c825d3a6de88a652e99bcaf04eb1dd6
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/swapfile.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index 7197864400a..4add436ee1d 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -2321,6 +2321,13 @@ int swapcache_prepare(swp_entry_t entry) return __swap_duplicate(entry, SWAP_HAS_CACHE); } +struct swap_info_struct *page_swap_info(struct page *page) +{ + swp_entry_t swap = { .val = page_private(page) }; + BUG_ON(!PageSwapCache(page)); + return swap_info[swp_type(swap)]; +} + /* * swap_lock prevents swap_map being freed. Don't grab an extra * reference on the swaphandle, it doesn't matter if it becomes unused. |