BTRFS_ILOCK_TRY
ilock_flags |= BTRFS_ILOCK_TRY;
ilock_flags |= BTRFS_ILOCK_TRY;
if (ilock_flags & BTRFS_ILOCK_TRY) {
if (ilock_flags & BTRFS_ILOCK_TRY) {
BTRFS_ILOCK_SHARED | (nowait ? BTRFS_ILOCK_TRY : 0));