linux-kernel - Re: [PATCH]md:dm.c Fix warning: statement with no effect

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Message-ID: <20100731190757.GC9734@agk-dp.fab.redhat.com>
Date:	Sat, 31 Jul 2010 20:07:57 +0100
From:	Alasdair G Kergon <agk@...hat.com>
To:	"Justin P. Mattock" <justinmattock@...il.com>
Cc:	dm-devel@...hat.com, neilb@...e.de, agk@...hat.com,
	linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH]md:dm.c Fix warning: statement with no effect

On Sat, Jul 31, 2010 at 12:05:04PM -0700, Justin P. Mattock wrote:
> haven't heard any feedback on this any ideas?
>> Ive noticed that having CONFIG_BLK_DEV_INTEGRITY=n I get warning messages generated by GCC(below)
>>    CC      drivers/md/dm.o
>> drivers/md/dm.c: In function 'split_bvec':
>> drivers/md/dm.c:1117:3: warning: statement with no effect
>> drivers/md/dm.c: In function 'clone_bio':
>> drivers/md/dm.c:1145:3: warning: statement with no effect

I'd suggest hiding it inside the .h files and not trying to scatter #ifdefs 
throughout the code.

Alasdair

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