Just kmap the bio single page payload before processing it.
(and yes, now highmem on sparc32 anyway, but kmap_(un)map atomic are nops,
so this gives the right example)
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
unsigned long offset = blk_rq_pos(req) << 9;
size_t len = blk_rq_cur_bytes(req);
blk_status_t err = BLK_STS_IOERR;
+ void *p;
if ((offset + len) > jdp->dsize)
goto end;
goto end;
}
- jsfd_read(bio_data(req->bio), jdp->dbase + offset, len);
+ p = kmap_atomic(bio_page(bio)) + bio_offset(bio);
+ jsfd_read(p, jdp->dbase + offset, len);
+ kunmap_atomic(p);
err = BLK_STS_OK;
end:
if (!__blk_end_request_cur(req, err))
put_disk(disk);
goto out;
}
- blk_queue_bounce_limit(disk->queue, BLK_BOUNCE_HIGH);
jsfd_disk[i] = disk;
}