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

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Date:	Mon, 22 Jul 2013 17:38:37 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Ingo Molnar <mingo@...nel.org>
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: Re: [PATCH -tip 3/3] x86: Remove unused text_poke_smp and
 text_poke_smp_batch

(2013/07/22 17:21), Ingo Molnar wrote:
> 
> * 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.

Ingo, please make sure your x86/jumplabel tree picked all of my patches.
This 3/3 strongly depends on the previous 1/3 and 2/3.
Without it, kprobes/opt.c can not be build because it still uses the
text_poke_params data structure which 3/3 removes.

Thank you,

-- 
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@...achi.com


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