linux-kernel - Re: [PATCH] Use test_and_clear_bit() instead atomic_dec_and_test() for stop

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Message-ID: <877gvji7lb.fsf@devron.myhome.or.jp>
Date:	Thu, 07 Jun 2012 22:18:08 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] Use test_and_clear_bit() instead atomic_dec_and_test() for stop_machine

Steven Rostedt <rostedt@...dmis.org> writes:

> On Wed, 2012-05-23 at 13:19 +0900, OGAWA Hirofumi wrote:
>> OGAWA Hirofumi <hirofumi@...l.parknet.co.jp> writes:
>> 
>> >> The down side to this is that it adds 4 more bytes on a 64bit
>> >> machine. (sizeof(unsigned log) == 8 and sizeof(atomic_t) == 4)
>> 
>> Another patch without additional 4bytes. This simply change
>> atomic_dec_and_test() to atomic_xchg().
>> 
>
> If nobody picked this up, you might want to resend it with my acked-by.
> (The second patch, not the first). As patches added to replies are
> usually ignored.

Thanks. I was going to add that to my personal patchset, I will try it again.
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
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