Commits
Tsutomu Itoh committed f0bd95ea726
Btrfs: confirmation of value is added before trace_btrfs_get_extent() is called We should confirm the value of extent_map before calling trace_btrfs_get_extent() because the value of extent_map has the possibility of NULL. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>