linux-kernel - Re: [patch] mm, mempolicy: make mpol_to

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Date:	Wed, 25 Sep 2013 15:06:51 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Dave Jones <davej@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Chen Gang <gang.chen@...anux.com>,
	Rik van Riel <riel@...hat.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [patch] mm, mempolicy: make mpol_to_str robust and always
 succeed

On Wed, 25 Sep 2013, Andrew Morton wrote:

> > I fully agree and have code in the oom killer that has the "fall through" 
> > comment if there's code in between the case statements, but I think things 
> > like
> > 
> > 	case MPOL_BIND:
> > 	case MPOL_INTERLEAVE:
> > 		...
> > 
> > is quite easy to read.  I don't feel strongly at all, though, so I'll just 
> > leave it to Andrew's preference.
> 
> I've never even thought about it, but that won't prevent me from
> pretending otherwise!  How about:
> 
> This:
> 
> 	case WIBBLE:
> 		something();
> 		something_else();
> 	case WOBBLE:
> 
> needs a /* fall through */ comment (because it *looks* like a mistake),
> whereas
> 
> 	case WIBBLE:
> 	case WOBBLE:
> 
> does not?
> 

The switch-case examples given in Documentation/CodingStyle agree with 
that.
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