net/core/filter.c: Fix build error

* Joe Perches <joe@perches.com> wrote:

> A mis-configured filter can spam the logs with lots of stack traces.
> 
> Rate-limit the warnings and add printout of the bogus filter information.
> 
> Original-patch-by: Ben Greear <greearb@candelatech.com>
> Signed-off-by: Joe Perches <joe@perches.com>
> ---
>  net/core/filter.c |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
> 
> diff --git a/net/core/filter.c b/net/core/filter.c
> index 0eb8c44..0e3622f 100644
> --- a/net/core/filter.c
> +++ b/net/core/filter.c
> @@ -350,7 +350,9 @@ load_b:
>  			continue;
>  		}
>  		default:
> -			WARN_ON(1);
> +			WARN_RATELIMIT(1, "Unknown code:%u jt:%u tf:%u k:%u\n",
> +				       fentry->code, fentry->jt,
> +				       fentry->jf, fentry->k);
>  			return 0;
>  		}

This change (now upstream) fails to build in about 20% of all 
randconfigs. Fix is below.

Thanks,

	Ingo

--------------------->
From b658026bc4915d16ff3e0f59b0edda11dbd6b991 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Thu, 26 May 2011 14:11:14 +0200
Subject: [PATCH] net/core/filter.c: Fix build error
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fix:

  net/core/filter.c:353:4: error: invalid storage class for function ‘DEFINE_RATELIMIT_STATE’

Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 net/core/filter.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

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On Thu, 2011-05-26 at 14:31 +0200, Ingo Molnar wrote:
> * Joe Perches <joe@perches.com> wrote:
> > A mis-configured filter can spam the logs with lots of stack traces.
> > Rate-limit the warnings and add printout of the bogus filter information.
> > Original-patch-by: Ben Greear <greearb@candelatech.com>
> > Signed-off-by: Joe Perches <joe@perches.com>
> > ---
> >  net/core/filter.c |    4 +++-
> >  1 files changed, 3 insertions(+), 1 deletions(-)
> > 
> > diff --git a/net/core/filter.c b/net/core/filter.c
> > index 0eb8c44..0e3622f 100644
> > --- a/net/core/filter.c
> > +++ b/net/core/filter.c
> > @@ -350,7 +350,9 @@ load_b:
> >  			continue;
> >  		}
> >  		default:
> > -			WARN_ON(1);
> > +			WARN_RATELIMIT(1, "Unknown code:%u jt:%u tf:%u k:%u\n",
> > +				       fentry->code, fentry->jt,
> > +				       fentry->jf, fentry->k);
> >  			return 0;
> >  		}
> This change (now upstream) fails to build in about 20% of all 
> randconfigs. Fix is below.

We've had problems with ratelimit uses in the past
as well.

There's a logical separation issue with the #includes
of bug.h, printk.h, ratelimit.h kernel.h and the
spinlock includes.

My suggestion would be to see about again adding
#include <linux/ratelimit.h> somehow
back to kernel.h which commit 3fff4c42bd0a removed
in 2009 because of the spinlock issues.

Any suggestion on how best to fix it generically?


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