linux-kernel - Re: livepatching tree for linux-next

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Date:	Thu, 08 Jan 2015 11:22:32 +0900
From:	Jingoo Han <jg1.han@...sung.com>
To:	'Andrew Morton' <akpm@...ux-foundation.org>,
	'Jiri Kosina' <jkosina@...e.cz>
Cc:	'Stephen Rothwell' <sfr@...b.auug.org.au>,
	'Josh Poimboeuf' <jpoimboe@...hat.com>,
	'Christoph Hellwig' <hch@...radead.org>,
	linux-kernel@...r.kernel.org, live-patching@...r.kernel.org,
	linux-next@...r.kernel.org, 'Steven Rostedt' <rostedt@...dmis.org>,
	'Masami Hiramatsu' <masami.hiramatsu.pt@...achi.com>,
	'Jingoo Han' <jg1.han@...sung.com>
Subject: Re: livepatching tree for linux-next

On Thursday, January 08, 2015 9:34 AM, Andrew Morton wrote:
> On Thu, 8 Jan 2015 01:11:03 +0100 (CET) Jiri Kosina <jkosina@...e.cz> wrote:
> 
> > On Wed, 7 Jan 2015, Andrew Morton wrote:
> >
> > > > --- a/kernel/livepatch/core.c
> > > > +++ b/kernel/livepatch/core.c
> > > > @@ -911,6 +911,12 @@ static int klp_init(void)
> > > >  {
> > > >  	int ret;
> > > >
> > > > +	ret = klp_check_compiler_support();
> > > > +	if (ret) {
> > > > +		pr_info("Your compiler is too old; turning off.\n");
> > > > +		return -EINVAL;
> > > > +	}
> > > > +
> > >
> > > Looks reasonable.
> >
> > Thanks. Can I treat this as your Reported-and-tested-by .. ?
> 
> I compile tested it.  Then I got bored trying to hunt down all the
> Kconfig things I needed to turn on to runtime test it ;)
> 
> btw, I suggest using HAVE_LIVE_PATCHING instead of
> ARCH_HAVE_LIVE_PATCHING.  because this:

I agree with your opinion. :-)
Using 'HAVE_LIVE_PATCHING' looks better.

Best regards,
Jingoo Han

> 
> akpm3:/usr/src/25> grep " HAVE_" arch/x86/Kconfig | wc -l
> 67
> akpm3:/usr/src/25> grep " ARCH_HAVE_" arch/x86/Kconfig | wc -l
> 3
> akpm3:/usr/src/25> grep " ARCH_HAS_" arch/x86/Kconfig | wc -l
> 7
> akpm3:/usr/src/25> grep " HAVE_ARCH" arch/x86/Kconfig | wc -l
> 8
> akpm3:/usr/src/25> grep " ARCH_USE" arch/x86/Kconfig | wc -l
> 4
> akpm3:/usr/src/25> grep " ARCH_WANT" arch/x86/Kconfig | wc -l
> 6
> 
> makes me cry.


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