567 			if (fs_devs->num_devices == 1) {  in btrfs_free_stale_device()
572 				fs_devs->num_devices--;  in btrfs_free_stale_device()
634 		fs_devices->num_devices++;  in device_list_add()
745 		fs_devices->num_devices++;  in clone_fs_devices()
800 		fs_devices->num_devices--;  in btrfs_close_extra_devices()
1700 	u64 num_devices;  in btrfs_rm_device()  local
1716 	num_devices = root->fs_info->fs_devices->num_devices;  in btrfs_rm_device()
1719 		WARN_ON(num_devices < 1);  in btrfs_rm_device()
1720 		num_devices--;  in btrfs_rm_device()
1724 	if ((all_avail & BTRFS_BLOCK_GROUP_RAID10) && num_devices <= 4) {  in btrfs_rm_device()
1729 	if ((all_avail & BTRFS_BLOCK_GROUP_RAID1) && num_devices <= 2) {  in btrfs_rm_device()
1838 	device->fs_devices->num_devices--;  in btrfs_rm_device()
1859 	num_devices = btrfs_super_num_devices(root->fs_info->super_copy) - 1;  in btrfs_rm_device()
1860 	btrfs_set_super_num_devices(root->fs_info->super_copy, num_devices);  in btrfs_rm_device()
1970 	fs_devices->num_devices--;  in btrfs_rm_dev_replace_remove_srcdev()
1995 	BUG_ON(!fs_devices->num_devices && !fs_devices->seeding);  in btrfs_rm_dev_replace_free_srcdev()
1998 	if (!fs_devices->num_devices) {  in btrfs_rm_dev_replace_free_srcdev()
2030 	fs_info->fs_devices->num_devices--;  in btrfs_destroy_dev_replace_tgtdev()
2148 	fs_devices->num_devices = 0;  in btrfs_prepare_sprout()
2338 	root->fs_info->fs_devices->num_devices++;  in btrfs_init_new_device()
2535 	fs_info->fs_devices->num_devices++;  in btrfs_init_dev_replace_tgtdev()
3658 	u64 num_devices;  in btrfs_balance()  local
3688 	num_devices = fs_info->fs_devices->num_devices;  in btrfs_balance()
3691 		BUG_ON(num_devices < 1);  in btrfs_balance()
3692 		num_devices--;  in btrfs_balance()
3696 	if (num_devices == 1)  in btrfs_balance()
3698 	else if (num_devices > 1)  in btrfs_balance()
3700 	if (num_devices > 2)  in btrfs_balance()
3702 	if (num_devices > 3)  in btrfs_balance()
6134 	fs_devices->num_devices++;  in add_missing_dev()
6415 			device->fs_devices->num_devices--;  in read_one_dev()
6416 			fs_devices->num_devices++;  in read_one_dev()