Re: [PATCH] autofs4 - fix false positive compile error

From: Ian Kent
Date: Wed Jun 25 2014 - 22:29:04 EST


On Wed, 2014-06-25 at 13:06 -0700, Andrew Morton wrote:
> On Wed, 25 Jun 2014 20:49:39 +0800 Ian Kent <raven@xxxxxxxxxx> wrote:
>
> > On strict build environments we can see:
> >
> > fs/autofs4/inode.c: In function 'autofs4_fill_super':
> > fs/autofs4/inode.c:312: error: 'pgrp' may be used uninitialized in this
> > function
> > make[2]: *** [fs/autofs4/inode.o] Error 1
> > make[1]: *** [fs/autofs4] Error 2
> > make: *** [fs] Error 2
> > make: *** Waiting for unfinished jobs....
> >
> > This is due to the use of pgrp_set being used to indicate pgrp has
> > has been set rather than initializing pgrp itself.
> >
>
> Yes, that code seems to be explicitly designed to trigger a gcc warning ;)
>
> What is a "strict build environment"? Someone's using -Werror for the
> entire kernel? That must make for a miserable life.

Yes, TBH I was a bit surprised myself.
It resulted from a RHEL-6.6 patch submission.

I didn't notice it and ended up missing an internal (RedHat) patch
submission deadline as my original interest in these was the result of
an upstream discussion and I stupidly relied on my upstream testing.

It might just be that our internal up and coming file system tree is
specifically more fussy but never the less I got caught out.

Ian

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