f2fs: introduce __{find,grab}_extent_tree

This patch introduces __{find,grab}_extent_tree for reusing by following
patches.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2015-03-19 19:24:59 +08:00 • committed by Jaegeuk Kim
commit 93dfc52656