BTRFS_AVAIL_ALLOC_BIT_SINGLE
(flags & BTRFS_AVAIL_ALLOC_BIT_SINGLE))
DESCRIBE_FLAG(BTRFS_AVAIL_ALLOC_BIT_SINGLE, "single");
allowed = BTRFS_AVAIL_ALLOC_BIT_SINGLE;
#define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
BTRFS_AVAIL_ALLOC_BIT_SINGLE)
flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;