hat.com> 1305130654 -0400 committer Josef Bacik 1306170190 -0400 Btrfs: map the node block when looking for readahead targets If we have particularly full nodes, we could call btrfs_node_blockptr up to 32 times, which is 32 pairs of kmap/kunmap, which _sucks_. So go ahead and map the extent buffer while we look for readahead targets. Thanks, Signed-off-by: Josef Bacik