linux-kernel - Re: [patch] Squashfs: silence some uninitialized variable warnings

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Date:	Wed, 13 Jul 2016 14:36:57 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Silvan Jegen <s.jegen@...il.com>
Cc:	Phillip Lougher <phillip@...ashfs.org.uk>,
	lkml <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org
Subject: Re: [patch] Squashfs: silence some uninitialized variable warnings

On Wed, Jul 13, 2016 at 01:29:32PM +0200, Silvan Jegen wrote:
> Hi Dan
> 
> On Wed, Jul 13, 2016 at 12:02 PM, Dan Carpenter
> <dan.carpenter@...cle.com> wrote:
> > We print these values in the TRACE() code before we check that
> > fill_meta_index() was successful.  It makes my static checker complain.
> >
> > Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> >
> > diff --git a/fs/squashfs/file.c b/fs/squashfs/file.c
> > index 13d8094..46679e2 100644
> > --- a/fs/squashfs/file.c
> > +++ b/fs/squashfs/file.c
> > @@ -334,9 +334,9 @@ failed:
> >   */
> >  static int read_blocklist(struct inode *inode, int index, u64 *block)
> >  {
> > -       u64 start;
> > +       u64 start = -1;
> 
> Do you assign the negative value to the unsigned variable here on purpose?
> 

Yeah.  It's just a garbage value but hopefully it would stand out in the
printk.

regards,
dan carpenter