Re: [PATCH] IDE update for 2.6.7-rc3 [11/12]

[Jens Axboe <axboe@suse.de>]

On Fri, Jun 11 2004, Bartlomiej Zolnierkiewicz wrote:
> On Friday 11 of June 2004 19:01, Jens Axboe wrote:
> > On Fri, Jun 11 2004, Bartlomiej Zolnierkiewicz wrote:
> > > [PATCH] ide: kill task_[un]map_rq()
> > >
> > > PIO handlers under CONFIG_IDE_TASKFILE_IO=n are never used for bio
> > > based requests (rq->bio is always NULL) so we can use rq->buffer
> > > directly instead of calling ide_[un]map_buffer().
> >
> > Not so sure if it's ever used for something requiring performance, and
> > even if it isn't then it may still be worth it to keep the mapping and
> > instead fix the task setup to map in user data with blk_rq_map_user() by
> > fixing up ide_taskfile_ioctl().
> 
> I agree about blk_rq_map_user() (I even did it once around 2.5.60-70).
> However I think that we are better off (slowly) killing old taskfile
> handlers completely (this patch is for old taskfile handlers only)
> and using CONFIG_IDE_TASKFILE_IO versions (which know about rq->bio).

Ah these are the old handlers. Then I fully agree, nuk the mappings.

-- 
Jens Axboe