mm: Convert add_to_swap_cache to XArray

Combine __add_to_swap_cache and add_to_swap_cache into one function
since there is no more need to preload.

Signed-off-by: Matthew Wilcox <willy@infradead.org>
This commit is contained in:
Matthew Wilcox 2017-11-27 15:46:54 -05:00
commit 8d93b41c09