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btrfs: use common helper instead of open coding a bit test

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The helper does the same math and we take care about the special case
when flags is 0 too.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2018-09-21 14:26:34 +02:00
parent 0110a4c434
commit 818255feec
1 changed files with 1 additions and 1 deletions
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fs/btrfs/volumes.c
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@ -3691,7 +3691,7 @@ static int alloc_profile_is_valid(u64 flags, int extended)
return !extended; /* "0" is valid for usual profiles */ return !extended; /* "0" is valid for usual profiles */
/* true if exactly one bit set */ /* 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) static inline int balance_need_close(struct btrfs_fs_info *fs_info)