btrfs: make tree_search return struct extent_state

We have a consistent pattern of

n = tree_search();
if (!n)
	goto out;
state = rb_entry(n, struct extent_state, rb_node);
while (state) {
	/* do something. */
}

which is a bit redundant.  If we make tree_search return the state we
can simply have

state = tree_search();
while (state) {
	/* do something. */
}

which cleans up the code quite a bit.

Signed-off-by: Josef Bacik <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>

0 files changed, 0 insertions, 0 deletions