next_backup      1842 fs/btrfs/disk-io.c 	int next_backup;
next_backup      1846 fs/btrfs/disk-io.c 	next_backup = info->backup_root_index;
next_backup      1847 fs/btrfs/disk-io.c 	last_backup = (next_backup + BTRFS_NUM_BACKUP_ROOTS - 1) %
next_backup      1857 fs/btrfs/disk-io.c 		next_backup = last_backup;
next_backup      1859 fs/btrfs/disk-io.c 	root_backup = info->super_for_commit->super_roots + next_backup;
next_backup      1867 fs/btrfs/disk-io.c 	info->backup_root_index = (next_backup + 1) % BTRFS_NUM_BACKUP_ROOTS;