linux-kernel - Re: [PATCH 002 of 5] Replace bio_data with blk_rq

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 16 Aug 2007 09:21:15 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Neil Brown <neilb@...e.de>
Cc:	linux-kernel@...r.kernel.org, Tejun Heo <htejun@...il.com>
Subject: Re: [PATCH 002 of 5] Replace bio_data with blk_rq_data

On Thu, Aug 16 2007, Neil Brown wrote:
> On Thursday August 16, jens.axboe@...cle.com wrote:
> > On Thu, Aug 16 2007, NeilBrown wrote:
> > > 
> > > Almost every call to bio_data is for the first bio
> > > in a request.  A future patch will add some accounting
> > > information to 'struct request' which will need to be
> > > used to find the start of the request in the bio.
> > > So replace bio_data with blk_rq_data which takes a 'struct request *'
> > > 
> > > The one exception is in dm-emc were using
> > >    page_address(bio->bi_io_vec[0].bv_page);
> > > is appropriate.
> > 
> > This (and 3+4) just look like preparatory patches if we want to merge
> > the full patchset, not bug fixes. I seem to recall you had more bug
> > fixes or cleanups in your patchset, maybe I was mistaken. So nak for now
> > for 2-4, I'd apply 5 but it depends on the previous.
> > 
> 
> I don't remember other bug fixes, but I'll look through and check.

OK, I'm properly remembering incorrectly then.

> 2 and 3 are very simple changes that - I think - make it clearer what
> is happening.

To be honest, I don't see much win in using blk_rq_data() over
bio_data() at all. I'd much much rather just see it go away!

> And I felt 5 was a sufficient improvement to justify it and 4...

5 is nice, I would like to apply that :-)

> I'll go hunting and see what other preliminaries I can find.

Thanks!

-- 
Jens Axboe

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