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mm/swapfile.c: fix comments for swapcache_prepare 

The -EEXIST returned by __swap_duplicate means there is a swap cache
instead -EBUSY

Signed-off-by: Chen Wandun <chenwandun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20200212145754.27123-1-chenwandun@huawei.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Chen Wandun 2020-04-01 21:06:07 -07:00 committed by Linus Torvalds
parent df3a0a21b6
commit 3eeba1356d
1 changed files with 1 additions and 1 deletions
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mm/swapfile.c
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@ -3475,7 +3475,7 @@ int swap_duplicate(swp_entry_t entry)
* *
* Called when allocating swap cache for existing swap entry, * Called when allocating swap cache for existing swap entry,
* This can return error codes. Returns 0 at success. * This can return error codes. Returns 0 at success.
* -EBUSY means there is a swap cache. * -EEXIST means there is a swap cache.
* Note: return code is different from swap_duplicate(). * Note: return code is different from swap_duplicate().
*/ */
int swapcache_prepare(swp_entry_t entry) int swapcache_prepare(swp_entry_t entry)