BTRFS_FS_STATE_EMERGENCY_SHUTDOWN
return unlikely(test_bit(BTRFS_FS_STATE_EMERGENCY_SHUTDOWN, &fs_info->fs_state));
if (!test_and_set_bit(BTRFS_FS_STATE_EMERGENCY_SHUTDOWN, &fs_info->fs_state)) {
[BTRFS_FS_STATE_EMERGENCY_SHUTDOWN] = 'E',