fs: rename buffer trylock

Like the page lock change, this also requires name change, so convert the
raw test_and_set bitop to a trylock.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 1922696..5699171 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -2435,7 +2435,7 @@
 		if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
 			lock_buffer(bh);
 		} else {
-			if (test_set_buffer_locked(bh)) {
+			if (!trylock_buffer(bh)) {
 				redirty_page_for_writepage(wbc, page);
 				continue;
 			}