sector_t sector = bio->bi_sector;
 
        bio_for_each_segment(bvec, bio, i) {
-               char *buffer = __bio_kmap_atomic(bio, i, KM_USER0);
+               char *buffer = __bio_kmap_atomic(bio, i);
                unsigned len = bvec->bv_len >> SECTOR_SHIFT;
 
                simdisk_transfer(dev, sector, len, buffer,
                                bio_data_dir(bio) == WRITE);
                sector += len;
-               __bio_kunmap_atomic(bio, KM_USER0);
+               __bio_kunmap_atomic(bio);
        }
        return 0;
 }
 
  * permanent PIO fall back, user is probably better off disabling highmem
  * I/O completely on that queue (see ide-dma for example)
  */
-#define __bio_kmap_atomic(bio, idx, kmtype)                            \
+#define __bio_kmap_atomic(bio, idx)                            \
        (kmap_atomic(bio_iovec_idx((bio), (idx))->bv_page) +    \
                bio_iovec_idx((bio), (idx))->bv_offset)
 
-#define __bio_kunmap_atomic(addr, kmtype) kunmap_atomic(addr)
+#define __bio_kunmap_atomic(addr) kunmap_atomic(addr)
 
 /*
  * merge helpers etc