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mm, THP, swap: unify swap slot free functions to put_swap_page

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Now, get_swap_page takes struct page and allocates swap space according
to page size(ie, normal or THP) so it would be more cleaner to introduce
put_swap_page which is a counter function of get_swap_page.  Then, it
calls right swap slot free function depending on page's size.

[[email protected]: minor cleanup and fix]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Minchan Kim <[email protected]>
Signed-off-by: "Huang, Ying" <[email protected]>
Acked-by: Johannes Weiner <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: Ebru Akagunduz <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Shaohua Li <[email protected]>
Cc: Tejun Heo <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Minchan Kim 2017-07-06 15:37:21 -07:00 • committed by Linus Torvalds
commit 75f6d6d29a
5 changed files with 21 additions and 24 deletions
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2
mm/vmscan.c
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@ -708,7 +708,7 @@ static int __remove_mapping(struct address_space *mapping, struct page *page,
mem_cgroup_swapout(page, swap);
__delete_from_swap_cache(page);
spin_unlock_irqrestore(&mapping->tree_lock, flags);
swapcache_free(swap);
put_swap_page(page, swap);
} else {
void (*freepage)(struct page *);
void *shadow = NULL;