cg_free           530 fs/ufs/ufs_fs.h #define ufs_ocg_blksfree(sb, ucg)    fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_free)
cg_free           596 fs/ufs/ufs_fs.h 	__u8	cg_free[1];		/* free block map */