linux-kernel - Re: [PATCH] fs/direct-io.c: Fix compilation warning for uninitialized variables

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Message-ID: <20140716175803.GA3631@infradead.org>
Date:	Wed, 16 Jul 2014 10:58:03 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	Boaz Harrosh <openosd@...il.com>
Cc:	Christoph Hellwig <hch@...radead.org>, pramod.gurav.etc@...il.com,
	viro@...iv.linux.org.uk, Jason Cooper <jason@...edaemon.net>,
	Markus Mayer <markus.mayer@...aro.org>,
	Paul Bolle <pebolle@...cali.nl>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fs/direct-io.c: Fix compilation warning for
 uninitialized variables

On Wed, Jul 16, 2014 at 08:08:41PM +0300, Boaz Harrosh wrote:
> This is the wrong fix. GCC is wrong here. As shown by Paul Bolle if
> you move the from / to set from dio_get_page() to here the warning goes away.
> 
> The minimal fix must use uninitialized_var() in this case. See patch below
> 
> But I think the proper fix Is the one Paul Bolle <pebolle@...cali.nl> sent (above)

I don't think the initialization is wrong.  The fix of moving the code
defintively looks nicer, while I think uninitialized_var is horrible
wart that won't get anywhere near my code.

Either way we should merge one of those fixes ASAP..

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