linux-kernel - Re: Print taint info in more places.

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Message-ID: <20071214165633.GA2825@redhat.com>
Date:	Fri, 14 Dec 2007 11:56:33 -0500
From:	Dave Jones <davej@...hat.com>
To:	Matt Mackall <mpm@...enic.com>
Cc:	Adrian Bunk <bunk@...nel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Andi Kleen <ak@....de>
Subject: Re: Print taint info in more places.

On Fri, Dec 14, 2007 at 09:38:44AM -0600, Matt Mackall wrote:
 > On Thu, Dec 13, 2007 at 08:30:41PM -0500, Dave Jones wrote:
 > >  #ifndef HAVE_ARCH_BUG
 > >  #define BUG() do { \
 > > -	printk("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __FUNCTION__); \
 > > +	printk(KERN_ERR "BUG: failure at %s:%d/%s()! (%s)\n",
 > > +		__FILE__, __LINE__, __FUNCTION__, print_tainted()); \
 > >  	panic("BUG!"); \
 > >  } while (0)
 > 
 > Might as well make this inline too, no?

Maybe.

 > > +void out_of_line_warnon(char *file, unsigned int line, const char *func);
 > 
 > How about __warn_on?

I'm easily swayed :)

 > > +void out_of_line_warnon(char *file, unsigned int line, const char *func)
 > 
 > Might as well make *file const too.

ok

 > > diff --git a/kernel/panic.c b/kernel/panic.c
 > > index 6f6e03e..198fc58 100644
 > > --- a/kernel/panic.c
 > > +++ b/kernel/panic.c
 > > @@ -173,6 +173,7 @@ const char *print_tainted(void)
 > >  		snprintf(buf, sizeof(buf), "Not tainted");
 > >  	return(buf);
 > >  }
 > > +EXPORT_SYMBOL(print_tainted);
 > 
 > Looks like you've got two patches here..

no, up top we added a print_tainted() call to BUG()
BUG() gets used in modules == needs its ancillary functions
also exported.

	Dave

-- 
http://www.codemonkey.org.uk
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