Hi Miao, There are new compile warnings show up in tree: git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next.git master head: 8e1163044779e90662e96887cdd692c1594146ad commit: dd817e81e81bbb83b63317b169d0e57a5d7ae0e1 [9/11] Btrfs: fix error path in create_pending_snapshot() config: x86_64-randconfig-h031 (attached as .config) All error/warnings: fs/btrfs/transaction.c: In function 'create_pending_snapshot': fs/btrfs/transaction.c:1118:6: warning: 'parent' may be used uninitialized in this function [-Wmaybe-uninitialized] fs/btrfs/transaction.c:1119:19: warning: 'rsv' may be used uninitialized in this function [-Wmaybe-uninitialized] vim +1118 fs/btrfs/transaction.c 1115 if (ret) 1116 goto abort_trans; 1117 fail: > 1118 dput(parent); 1119 trans->block_rsv = rsv; 1120 no_free_objectid: 1121 kfree(new_root_item); --- 0-DAY kernel build testing backend Open Source Technology Centre Fengguang Wu Intel Corporation