On 21.09.2018 15:26, David Sterba wrote:
> The helper does the same math and we take care about the special case
> when flags is 0 too.
>
> Signed-off-by: David Sterba <[email protected]>
Reviewed-by: Nikolay Borisov <[email protected]>
> ---
> fs/btrfs/volumes.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
> index 909c578506ee..26eb388db343 100644
> --- a/fs/btrfs/volumes.c
> +++ b/fs/btrfs/volumes.c
> @@ -3691,7 +3691,7 @@ static int alloc_profile_is_valid(u64 flags, int
> extended)
> return !extended; /* "0" is valid for usual profiles */
>
> /* true if exactly one bit set */
> - return (flags & (flags - 1)) == 0;
> + return is_power_of_2(flags);
> }
>
> static inline int balance_need_close(struct btrfs_fs_info *fs_info)
>
