| commit | 41aec91f55985e7f14ee75fe2f6e7bcfff0d0fae | [log] [tgz] |
|---|---|---|
| author | Matthew Wilcox <willy@infradead.org> | Fri Nov 10 15:34:55 2017 -0500 |
| committer | Matthew Wilcox <willy@infradead.org> | Sun Oct 21 10:45:58 2018 -0400 |
| tree | 4efdedeabd066e15a542b28f21a47731c5323b5b | |
| parent | 58d6ea3085f2e53714810a513c61629f6d2be0a6 [diff] |
xarray: Add XArray conditional store operations Like cmpxchg(), xa_cmpxchg will only store to the index if the current entry matches the old entry. It returns the current entry, which is usually more useful than the errno returned by radix_tree_insert(). For the users who really only want the errno, the xa_insert() wrapper provides a more convenient calling convention. Signed-off-by: Matthew Wilcox <willy@infradead.org>