mm: Convert page-writeback to XArray

Includes moving mapping_tagged() to fs.h as a static inline, and
changing it to return bool.

Signed-off-by: Matthew Wilcox <willy@infradead.org>
This commit is contained in:
Matthew Wilcox 2017-11-22 11:41:23 -05:00
commit ff9c745b81
2 changed files with 36 additions and 53 deletions