linux-kernel - Re: [PATCH] - fix compile warning: `found' might be used uninitialized in this function

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Message-Id: <20070322004540.45d8ee87.akpm@linux-foundation.org>
Date:	Thu, 22 Mar 2007 00:45:40 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Johannes Weiner <hannes-kernel@...urebad.de>
Cc:	roland <devzero@....de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] - fix compile warning: `found' might be used
 uninitialized in this function

On Thu, 22 Mar 2007 00:56:08 +0100 Johannes Weiner <hannes-kernel@...urebad.de> wrote:

> On Thu, Mar 22, 2007 at 12:48:05AM +0100, roland wrote:
> > fs/block_dev.c: In function `bd_claim_by_kobject':
> > fs/block_dev.c:953: warning: `found' might be used uninitialized in this 
> > function
> 
> found actually _is_ used uninitialized if the call to bd_claim() returns
> anything but 0.

No, it isn't.

        if (res || found)
                free_bd_holder(bo);

`found' won't be evaluated if res!=0.

The code in there is irksome - it'd be nice to find some way of
restructuring it to make it less obscure, and to kill that warning.
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