Re: [dm-devel] [PATCH 2/6] block: no need to initialize rq->cmd with blk_get_request

[James Bottomley <James Bottomley HansenPartnership com>]

On Sat, 2008-04-26 at 01:54 +0900, FUJITA Tomonori wrote:
> On Fri, 25 Apr 2008 11:45:01 -0500
> James Bottomley <James Bottomley HansenPartnership com> wrote:
> 
> > On Sat, 2008-04-26 at 01:23 +0900, FUJITA Tomonori wrote:
> > > blk_get_request initializes rq->cmd (rq_init does) so the users don't
> > > need to do that.
> > > 
> > > The purpose of this patch is to remove sizeof(rq->cmd) and &rq->cmd,
> > > as a preparation for large command support, which changes rq->cmd from
> > > the static array to a pointer. sizeof(rq->cmd) will not make sense and
> > > &rq->cmd won't work.
> > > 
> > > Signed-off-by: FUJITA Tomonori <fujita tomonori lab ntt co jp>
> > > Cc: James Bottomley <James Bottomley HansenPartnership com>
> > > Cc: Alasdair G Kergon <agk redhat com>
> > > Cc: Jens Axboe <jens axboe oracle com>
> > > ---
> > >  block/scsi_ioctl.c          |    3 ---
> > >  drivers/block/pktcdvd.c     |    2 --
> > >  drivers/cdrom/cdrom.c       |    1 -
> > 
> > These:
> > 
> > >  drivers/md/dm-emc.c         |    2 --
> > >  drivers/md/dm-mpath-hp-sw.c |    1 -
> > >  drivers/md/dm-mpath-rdac.c  |    1 -
> > 
> > Conflict with this set of patches:
> > 
> > http://git.kernel.org/?p=linux/kernel/git/jejb/scsi-pending-2.6.git;a=summary
> > 
> > Which move the dm pieces to being request based.  The patch series
> > hasn't had an ACK yet from Alasdair, but it would be nice if you could
> > look it over and see if it needs the memsets pulling out.
> 
> Seems that it needs the memsets pulling out. For example,
> 
> [PATCH 2/7] scsi_dh: add lsi rdac device handler has:
> 
> +	memset(&rq->cmd, 0, BLK_MAX_CDB);
> 
> 
> Do you want a patch against scsi-pending?

Yes please ...

Thanks,

James