numbytes = BBTOB(numblks);
 
        /* Check for IOs smaller than the sector size / not sector aligned */
-       ASSERT(!(numbytes < btp->bt_ssize));
-       ASSERT(!(BBTOB(blkno) & (xfs_off_t)btp->bt_smask));
+       ASSERT(!(numbytes < btp->bt_meta_sectorsize));
+       ASSERT(!(BBTOB(blkno) & (xfs_off_t)btp->bt_meta_sectormask));
 
        /*
         * Corrupted block numbers can get through to here, unfortunately, so we
        unsigned int            blocksize,
        unsigned int            sectorsize)
 {
-       btp->bt_ssize = sectorsize;
-       btp->bt_smask = sectorsize - 1;
+       btp->bt_meta_sectorsize = sectorsize;
+       btp->bt_meta_sectormask = sectorsize - 1;
 
        if (set_blocksize(btp->bt_bdev, sectorsize)) {
                char name[BDEVNAME_SIZE];
 
        struct block_device     *bt_bdev;
        struct backing_dev_info *bt_bdi;
        struct xfs_mount        *bt_mount;
-       unsigned int            bt_ssize;
-       size_t                  bt_smask;
+       unsigned int            bt_meta_sectorsize;
+       size_t                  bt_meta_sectormask;
 
        /* LRU control structures */
        struct shrinker         bt_shrinker;
 
                xfs_buftarg_t   *target =
                        XFS_IS_REALTIME_INODE(ip) ?
                                mp->m_rtdev_targp : mp->m_ddev_targp;
-               if ((pos & target->bt_smask) || (size & target->bt_smask)) {
+               if ((pos | size) & target->bt_meta_sectormask) {
                        if (pos == i_size_read(inode))
                                return 0;
                        return -XFS_ERROR(EINVAL);
        struct xfs_buftarg      *target = XFS_IS_REALTIME_INODE(ip) ?
                                        mp->m_rtdev_targp : mp->m_ddev_targp;
 
-       if ((pos & target->bt_smask) || (count & target->bt_smask))
+       if ((pos | count) & target->bt_meta_sectormask)
                return -XFS_ERROR(EINVAL);
 
        if ((pos & mp->m_blockmask) || ((pos + count) & mp->m_blockmask))
 
                        XFS_IS_REALTIME_INODE(ip) ?
                        mp->m_rtdev_targp : mp->m_ddev_targp;
 
-               da.d_mem = da.d_miniosz = target->bt_ssize;
+               da.d_mem = da.d_miniosz = target->bt_meta_sectorsize;
                da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
 
                if (copy_to_user(arg, &da, sizeof(da)))