linux-kernel - Re: [PATCH v2 04/12] md/raid5: Move common stripe count increment code into __find

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Message-ID: <YmD1Tenc2Ylu+biA@infradead.org>
Date:   Wed, 20 Apr 2022 23:10:21 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Logan Gunthorpe <logang@...tatee.com>
Cc:     linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
        Song Liu <song@...nel.org>,
        Christoph Hellwig <hch@...radead.org>,
        Guoqing Jiang <guoqing.jiang@...ux.dev>,
        Stephen Bates <sbates@...thlin.com>,
        Martin Oliveira <Martin.Oliveira@...eticom.com>,
        David Sloan <David.Sloan@...eticom.com>
Subject: Re: [PATCH v2 04/12] md/raid5: Move common stripe count increment
 code into __find_stripe()

On Wed, Apr 20, 2022 at 01:54:17PM -0600, Logan Gunthorpe wrote:
> Both uses of find_stripe() require a fairly complicated dance to
> increment the reference count. Move this into a common find_get_stripe()
> helper.
> 
> No functional changes intended.

The subject is wrong now.

>  static struct stripe_head *__find_stripe(struct r5conf *conf, sector_t sector,
> -					 short generation)
> +					 short generation, int hash)
>  {
>  	struct stripe_head *sh;
>  
> @@ -624,6 +624,49 @@ static struct stripe_head *__find_stripe(struct r5conf *conf, sector_t sector,
>  	return NULL;
>  }

And the new hash argument here is not needed.

Otherwise looks good:

Reviewed-by: Christoph Hellwig <hch@....de>