diff options
| -rw-r--r-- | include/linux/swap.h | 1 | ||||
| -rw-r--r-- | mm/swapfile.c | 7 |
2 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h index be5eecc..bd6e937 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -348,6 +348,7 @@ extern int swap_type_of(dev_t, sector_t, struct block_device **); extern unsigned int count_swap_pages(int, int); extern sector_t map_swap_page(struct page *, struct block_device **); extern sector_t swapdev_block(int, pgoff_t); +extern struct swap_info_struct *page_swap_info(struct page *); extern int reuse_swap_page(struct page *); extern int try_to_free_swap(struct page *); struct backing_dev_info; 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. |