btrfs-progs: extent-cache: Add comments for search/lookup functions
authorQu Wenruo <quwenruo@cn.fujitsu.com>
Tue, 1 Dec 2015 07:11:21 +0000 (15:11 +0800)
committerDavid Sterba <dsterba@suse.com>
Tue, 12 Jan 2016 14:01:03 +0000 (15:01 +0100)
commit466e066837898ec047165b8f1081c529092c6d0a
tree8e82053dabf3d2e36231c1d0c40d2bfb1c4d3d8f
parent9709d754db09629c0b540055b6abf7cfdcf480c8
btrfs-progs: extent-cache: Add comments for search/lookup functions

There are quite a lot search/lookup functions with different behavior,
add comments for them, as it will take extra time to view source to
understand the behavior difference.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
extent-cache.h