btrfs: convert while loop to list_for_each_entry (ebcc9301) · Commits · 戴 / test

fs/btrfs/volumes.c

+2 −9

Original line number	Diff line number	Diff line
		@@ -4629,7 +4629,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
		{
		struct btrfs_fs_info *info = trans->fs_info;
		struct btrfs_fs_devices *fs_devices = info->fs_devices;
		struct list_head *cur;
		struct btrfs_device *device;
		struct map_lookup *map = NULL;
		struct extent_map_tree *em_tree;
		struct extent_map *em;
		@@ -4703,22 +4703,15 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
		if (!devices_info)
		return -ENOMEM;

		cur = fs_devices->alloc_list.next;

		/*
		* in the first pass through the devices list, we gather information
		* about the available holes on each device.
		*/
		ndevs = 0;
		while (cur != &fs_devices->alloc_list) {
		struct btrfs_device *device;
		list_for_each_entry(device, &fs_devices->alloc_list, dev_alloc_list) {
		u64 max_avail;
		u64 dev_offset;

		device = list_entry(cur, struct btrfs_device, dev_alloc_list);

		cur = cur->next;

		if (!device->writeable) {
		WARN(1, KERN_ERR
		"BTRFS: read-only device in alloc_list\n");