linux-kernel - Re: [PATCH 2/2] kprobes: check CONFIG_FREEZER instead of CONFIG

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Date:	Sun, 11 Jan 2009 04:49:33 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Len Brown <lenb@...nel.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Pavel Machek <pavel@...e.cz>,
	LKML <linux-kernel@...r.kernel.org>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Cheng Renquan <crquan@...il.com>
Subject: Re: [PATCH 2/2] kprobes: check CONFIG_FREEZER instead of CONFIG_PM


* Len Brown <lenb@...nel.org> wrote:

> > > Check CONFIG_FREEZER instead of CONFIG_PM because kprobe booster
> > > depends on freeze_processes() and thaw_processes() when CONFIG_PREEMPT=y.
> > > 
> > > This fixes a linkage error which occurs when CONFIG_PREEMPT=y, CONFIG_PM=y
> > > and CONFIG_FREEZER=n.
> > > 
> > > Reported-by: Cheng Renquan <crquan@...il.com>
> > > Signed-off-by: Masami Hiramatsu <mhiramat@...hat.com>
> > > Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
> > > ---
> > >  arch/ia64/kernel/kprobes.c |    2 +-
> > >  arch/x86/kernel/kprobes.c  |    2 +-
> > >  kernel/kprobes.c           |    2 +-
> > >  3 files changed, 3 insertions(+), 3 deletions(-)
> > 
> > looks good, the x86 bits:
> > 
> > Acked-by: Ingo Molnar <mingo@...e.hu>
> 
> man, we have too many config options:-)

Agreed :-/

The idea is that of learning-via-pain: many config options cause many 
fixes, which causes people to reduce config options. At least that's the 
theory ;-) /me looks at his .config size and wonders

	Ingo
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