linux-kernel - Re: [patch] Printk kernel version in WARN

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Message-Id: <20071117104652.8240af62.akpm@linux-foundation.org>
Date:	Sat, 17 Nov 2007 10:46:52 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu, tglx@...x.de
Subject: Re: [patch] Printk kernel version in WARN_ON

On Sat, 17 Nov 2007 10:39:47 -0800 Arjan van de Ven <arjan@...radead.org> wrote:

> On Sat, 17 Nov 2007 10:27:20 -0800
> Andrew Morton <akpm@...ux-foundation.org> wrote:
> 
> > On Sat, 17 Nov 2007 10:15:52 -0800 Arjan van de Ven
> > <arjan@...radead.org> wrote:
> > 
> > > @@ -35,8 +36,8 @@ struct bug_entry {
> > >  #define WARN_ON(condition)
> > > ({						\ int
> > > __ret_warn_on = !!(condition);				\ if
> > > (unlikely(__ret_warn_on)) {					\
> > > -		printk("WARNING: at %s:%d %s()\n",
> > > __FILE__,		\
> > > -			__LINE__,
> > > __FUNCTION__);			\
> > > +		printk("WARNING: at %s:%d %s()  (%s)\n",
> > > __FILE__,	\
> > > +			__LINE__, __FUNCTION__,
> > > UTS_RELEASE);		\
> > > dump_stack();
> > > \ }
> > > \ unlikely(__ret_warn_on);					\
> > 
> > that made our 1100-odd WARN_ON sites fatter.
> 
> by ... not too much at least, gcc ought to be quite good at merging
> same-strings into one, so it's just one extra pointer argument
> 

I think I knew that.  At 1000 callsites.
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