linux-kernel - Re: [PATCH] init/version.c: Silenced sparse warning by declaring the version string.

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Date:	Mon, 14 Jul 2008 12:02:26 -0700
From:	Daniel Guilak <guilak@...ux.vnet.ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, trivial@...nel.org,
	torvalds@...ux-foundation.org, daniel@...ielguilak.com
Subject: Re: [PATCH] init/version.c: Silenced sparse warning by declaring
	the version string.

On Fri, 2008-07-11 at 12:18 -0700, Andrew Morton wrote:
> On Tue, 08 Jul 2008 14:21:09 -0700 Daniel Guilak <guilak@...ux.vnet.ibm.com> wrote:
> 
> > Signed-off-by: Daniel Guilak <daniel@...ielguilak.com>
> 
> Please always quote the warning or error message in the changelog when
> fixing it.  Although it's pretty obvious in this case.
> 
> >  init/version.c |    1 +
> >  1 files changed, 1 insertions(+), 0 deletions(-)
> > 
> > diff --git a/init/version.c b/init/version.c
> > index 9d17d70..041fd82 100644
> > --- a/init/version.c
> > +++ b/init/version.c
> > @@ -16,6 +16,7 @@
> >  #define version(a) Version_ ## a
> >  #define version_string(a) version(a)
> >  
> > +extern int version_string(LINUX_VERSION_CODE);
> >  int version_string(LINUX_VERSION_CODE);
> >  
> >  struct uts_namespace init_uts_ns = {
> 
> hrm, what does this thing do?  Seems to define 
> 
> int Version_132634;
> 
> Then sticks that in the symbol table (and wastes a bit of bss).
> 
> Does anything use it?
> 
> Could it be made static?
> 
> 
Apparently it's only used by the ksymoops tool, which is not needed if
(according to README) the kernel is configured with CONFIG_KALLSYMS.

So I will submit a patch depending on this one that will define
version_string only if CONFIG_KALLSYMS is not defined, and hopefully
that will deal with the problem.

--Daniel Guilak

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