Adds nowait asserts to btree search functions which are not used by
buffered IO and direct IO paths.
Reviewed-by: NFilipe Manana <fdmanana@suse.com>
Signed-off-by: NStefan Roesch <shr@fb.com>
Reviewed-by: NDavid Sterba <dsterba@suse.com>
Signed-off-by: NDavid Sterba <dsterba@suse.com>