linux-kernel - Re: [PATCH v2 21/26] block: Convert some code to bio_for_each_segment

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Message-ID: <20120921003832.GY7264@google.com>
Date:	Thu, 20 Sep 2012 17:38:32 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Kent Overstreet <koverstreet@...gle.com>
Cc:	linux-bcache@...r.kernel.org, linux-kernel@...r.kernel.org,
	dm-devel@...hat.com, axboe@...nel.dk, neilb@...e.de
Subject: Re: [PATCH v2 21/26] block: Convert some code to
 bio_for_each_segment_all()

On Mon, Sep 10, 2012 at 05:22:32PM -0700, Kent Overstreet wrote:
> A few places in the code were either open coding or using the wrong
> version - fix.
> 
> Signed-off-by: Kent Overstreet <koverstreet@...gle.com>
> CC: Jens Axboe <axboe@...nel.dk>
> CC: NeilBrown <neilb@...e.de>
> ---
> --- a/drivers/md/raid1.c
> +++ b/drivers/md/raid1.c
> @@ -921,7 +921,7 @@ static void alloc_behind_pages(struct bio *bio, struct r1bio *r1_bio)
>  	if (unlikely(!bvecs))
>  		return;
>  
> -	bio_for_each_segment(bvec, bio, i) {
> +	bio_for_each_segment_all(bvec, bio, i) {

I don't get this conversion.  Why is this necessary?

-- 
tejun
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