btrfs: use slab for end_io_wq structures

The structure is frequently reused.  Rename it according to the slab
name.

Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
David Sterba 2014-07-30 00:55:42 +02:00
commit 97eb6b69d1
3 changed files with 38 additions and 10 deletions