linux-kernel - Re: [PATCH 22/28] printk,kdb: capture printk() when in kdb shell

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Message-Id: <20100212203922.d8fef332.akpm@linux-foundation.org>
Date:	Fri, 12 Feb 2010 20:39:22 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Jason Wessel <jason.wessel@...driver.com>
Cc:	linux-kernel@...r.kernel.org, kgdb-bugreport@...ts.sourceforge.net,
	mingo@...e.hu, Randy Dunlap <randy.dunlap@...cle.com>
Subject: Re: [PATCH 22/28] printk,kdb: capture printk() when in kdb shell

On Fri, 12 Feb 2010 17:20:22 -0600 Jason Wessel <jason.wessel@...driver.com> wrote:

> Andrew Morton wrote:
> > On Fri, 12 Feb 2010 16:35:37 -0600 Jason Wessel <jason.wessel@...driver.com> wrote:
> >
> >   
> >> @@ -609,6 +610,14 @@ asmlinkage int printk(const char *fmt, ...)
> >>  	va_list args;
> >>  	int r;
> >>  
> >> +#ifdef CONFIG_KGDB_KDB
> >> +	if (unlikely(kdb_trap_printk)) {
> >> +		va_start(args, fmt);
> >> +		r = vkdb_printf(fmt, args);
> >> +		va_end(args);
> >> +		return r;
> >> +	}
> >> +#endif
> >>  	va_start(args, fmt);
> >>  	r = vprintk(fmt, args);
> >>  	va_end(args);
> >>     
> >
> > this?
> >
> > --- a/kernel/printk.c~a
> > +++ a/kernel/printk.c
> > @@ -594,7 +594,11 @@ asmlinkage int printk(const char *fmt, .
> >  	int r;
> >  
> >  	va_start(args, fmt);
> > +#ifdef CONFIG_KGDB_KDB
> > +	r = vkdb_printf(fmt, args);
> > +#else
> >  	r = vprintk(fmt, args);
> > +#endif
> >  	va_end(args);
> >  
> >  	return r;
> > _
> >   
> 
> If you feel that would be cleaner, I can make that change, but I would
> also have to call vprintk() from vkdb_printf when ever kdb_trap_printk
> is not set.  Do I understand your recommendation correctly?
> 

err, no, I must have been in a drunken stupor.  Was trying to find
a way to avoid the code duplication.


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