tree 77cfeb9532c7eb15a9d6a1c880066e49e24a9e96
parent e339a6b097c515a31ce230d498c44ff2e89f1cf4
author Filipe Manana <fdmanana@suse.com> 1404328074 +0100
committer Chris Mason <clm@fb.com> 1408113793 -0700

Btrfs: read lock extent buffer while walking backrefs

Before processing the extent buffer, acquire a read lock on it, so
that we're safe against concurrent updates on the extent buffer.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>