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| author | D. Andrei Măceș <dmaces@nd.edu> | 2015-09-30 15:18:37 -0400 |
|---|---|---|
| committer | Andreas Blaesius <skate4life@gmx.de> | 2016-06-05 21:21:55 +0200 |
| commit | ed5cb9a3ed4b37562cce5141b422741646fdc882 (patch) | |
| tree | f3cddd4be38be3d35363071b31345c086f404520 /mm | |
| parent | 0a9de80ece1bf937de0363afe9016551c47c6c04 (diff) | |
| download | kernel_samsung_espresso10-ed5cb9a3ed4b37562cce5141b422741646fdc882.zip kernel_samsung_espresso10-ed5cb9a3ed4b37562cce5141b422741646fdc882.tar.gz kernel_samsung_espresso10-ed5cb9a3ed4b37562cce5141b422741646fdc882.tar.bz2 | |
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 7197864..4add436 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. |