On Thu, Dec 21 2006, FUJITA Tomonori wrote:
> From: Jens Axboe <jens.axboe@xxxxxxxxxx>
> Subject: Re: [PATCH 4/6] bsg: add sg_io_v4 structure
> Date: Wed, 20 Dec 2006 11:13:14 +0100
>
> > On Wed, Dec 20 2006, FUJITA Tomonori wrote:
> > > This patch adds sg_io_v4 structure that Doug proposed last month.
> > >
> > > There's one major change from the RFC. I dropped iovec, which needs
> > > compat stuff. The bsg code simply calls blk_rq_map_user against
> > > dout_xferp/din_xferp. So if possible, the page frames are directly
> > > mapped. If not possible, the block layer allocates new page frames and
> > > does memory copies.
> > >
> > > Signed-off-by: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
> > > ---
> > > include/linux/bsg.h | 43 +++++++++++++++++++++++++++++++++++++++++++
> > > 1 files changed, 43 insertions(+), 0 deletions(-)
> > >
> > > diff --git a/include/linux/bsg.h b/include/linux/bsg.h
> > > index dc0d728..0d212cc 100644
> > > --- a/include/linux/bsg.h
> > > +++ b/include/linux/bsg.h
> > > @@ -1,6 +1,47 @@
> > > #ifndef BSG_H
> > > #define BSG_H
> > >
> > > +struct sg_io_v4 {
> > > + int32_t guard; /* [i] 'Q' to differentiate from v3 */
> > > + uint32_t protocol; /* [i] 0 -> SCSI , .... */
> >
> > I prefer using the u32 types and so on for explicitly sized variables.
> > I'll make that change.
>
> I see though we need to use __u32 instead of u32, don't we?
Yep, we should.
--
Jens Axboe
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