diff options
| -rw-r--r-- | fs/btrfs/volumes.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 8508f6028c8d..4075b1b95105 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -3857,7 +3857,11 @@ 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 is_power_of_2(flags); + /* + * Don't use is_power_of_2(unsigned long) because it won't work + * for the single profile (1ULL << 48) on 32-bit CPUs. + */ + return flags != 0 && (flags & (flags - 1)) == 0; } static inline int balance_need_close(struct btrfs_fs_info *fs_info) |