Btrfs: Don't drop extent_map cache during releasepage on the btree inode

The btree inode should only have a single extent_map in the cache,
it doesn't make sense to ever drop it.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
3 files changed
tree: cf4432c69f660f0c22c1b6415c0d907ba6d44c8a
  1. fs/