> diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
> index a0ee2f8..3a1a700 100644
> --- a/fs/btrfs/ctree.h
> +++ b/fs/btrfs/ctree.h
> @@ -3103,6 +3103,19 @@ void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
> struct btrfs_root *root, const char *function,
> unsigned int line, int errno);
>
> +static inline void btrfs_chk_lzo_incompat(struct btrfs_root *root)
Isn't btrfs_set_lzo_incompat() is a better name?
> +{
> + struct btrfs_super_block *disk_super;
> + u64 features;
> +
> + disk_super = root->fs_info->super_copy;
> + features = btrfs_super_incompat_flags(disk_super);
> + if (!(features & BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)) {
> + features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO;
> + btrfs_set_super_incompat_flags(disk_super, features);
> + }
> +}
> +
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