lkml.org 
[lkml]   [2007]   [Sep]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH -mm 1/2] 3c59x: Fix uninitialized variable bug
On Tue, Sep 04, 2007 at 09:53:31AM +0100, Mark Hindley wrote:
> On Tue, Sep 04, 2007 at 02:09:47PM +0530, Satyam Sharma wrote:
> > Hi Steffen,
> >
> >
> > On Tue, 4 Sep 2007, Steffen Klassert wrote:
> >
> > > On Tue, Sep 04, 2007 at 03:45:55AM +0530, Satyam Sharma wrote:
> > > >
> > > > drivers/net/3c59x.c: In function 'vortex_up':
> > > > drivers/net/3c59x.c:1495: warning: 'err' may be used uninitialized in this function
> > >
> > > This came in with the recently applied 3c59x-check-return-of-pci_enable_device patch
> > > from Mark Hindley. I just compiled it on a PCI only machine so far, therefore I did
> > > not notice the warning yet.
> >
> > Hmm, the .config I built with had PCI=y as well. Probably a compiler
> > version difference -- Jeff also mentioned yesterday that some newer
> > GCC versions fail to warn about uninitialized variables cases.
> >
>
> Sorry, this is my bad. I have just checked: there is no warning with gcc
> 4.2 or 4.1, but 3.3 emits the warning.
>

The only warning that I was able to trigger with gcc 4.2 is in the case of a .config
without PCI support. In this case I get

drivers/net/3c59x.c: In function 'vortex_up':
drivers/net/3c59x.c:1672: warning: 'err' is used uninitialized in this function
^^
So we have to be more carefull with the newer gcc versions.

Steffen

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-09-04 11:21    [from the cache]
©2003-2011 Jasper Spaans. Advertise on this site