linux-kernel - Re: [PATCH -tip 3/3] x86: Remove unused text_poke_smp and text_poke_smp

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Message-ID: <20130722082104.GA26823@gmail.com>
Date:	Mon, 22 Jul 2013 10:21:04 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Steven Rostedt <rostedt@...dmis.org>,
	Jason Baron <jbaron@...mai.com>, yrl.pp-manager.tt@...achi.com,
	Borislav Petkov <bpetkov@...e.de>
Subject: Re: [PATCH -tip 3/3] x86: Remove unused text_poke_smp and
 text_poke_smp_batch


* Ingo Molnar <mingo@...nel.org> wrote:

> 
> * Masami Hiramatsu <masami.hiramatsu.pt@...achi.com> wrote:
> 
> > Since introducing the text_poke_bp for all text_poke_smp*
> > callers, text_poke_smp* are now unused. This basically
> > reverts 3d55cc8a, 7deb18dc and related commits.
> > 
> > This also fixes a Kconfig dependency issue on STOP_MACHINE
> > in the case of CONFIG_SMP && !CONFIG_MODULE_UNLOAD.
> > 
> > Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
> > ---
> >  arch/x86/Kconfig                   |    5 --
> >  arch/x86/include/asm/alternative.h |   11 ----
> >  arch/x86/kernel/alternative.c      |   98 +-----------------------------------
> >  3 files changed, 2 insertions(+), 112 deletions(-)
> 
> Hm, it does not build with the attached config:
> 
> arch/x86/kernel/kprobes/opt.c: In function 'setup_optimize_kprobe':
> arch/x86/kernel/kprobes/opt.c:394:6: error: dereferencing pointer to incomplete type
> arch/x86/kernel/kprobes/opt.c:395:6: error: dereferencing pointer to incomplete type
> arch/x86/kernel/kprobes/opt.c:396:6: error: dereferencing pointer to incomplete type

32-bit appears to be the key pattern.

Thanks,

	Ingo
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