Re: New Mitsumi legacy CD-ROM driver

[Rene Herman]

On 05/08/2007 03:49 PM, Jens Axboe wrote:

> The key is that you have to have interrupts disabled for the highmem
> case, which may complicate your driver (or just make it perform worse,
> from the system POV). If you let the block layer bounce, then you can
> just use page_address() and don't worry about disabling interrupts.

Okay, yes, thank you, the mapping is gone. The data-transfer loop has now 
turned into just:

rq_for_each_bio(bio, req)
     bio_for_each_segment(bvec, bio, segno)
          ioread8_rep(mcd->ioaddr, page_address(bvec->bv_page) +
                      bvec->bv_offset, bvec->bv_len);

> - Or, it's a newer system and the nerd in you likes to play with ancient
>   CD-ROM drives.

And he has long since driven out most of my other personalities...

> Fine with me... As far as I am concerned, you are now the legacy CD-ROM
> driver maintainer :-)

Yippie :-)

Rene.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/