linux-kernel - Re: [PATCH] x86: Change thread_info's flag field back to 32 bits

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Message-ID: <20081204100620.GA17634@elte.hu>
Date:	Thu, 4 Dec 2008 11:06:20 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Joe Korty <joe.korty@...r.com>
Cc:	linux-kernel@...r.kernel.org,
	the arch/x86 maintainers <x86@...nel.org>
Subject: Re: [PATCH] x86: Change thread_info's flag field back to 32 bits


* Joe Korty <joe.korty@...r.com> wrote:

> Change x86_64's thread_info 'flags' field back to __u32.
> 
> This was changed to 'unsigned long' when the thread_info*.h
> for i386 and x86_64 were merged.  Change it back.  We can
> do this as only 27 bits of 'flags' are actually used.
> 
> This change actually packs down thread_info by 64 bits:
> 32 bits are saved by the smaller flags, and 32 bits are
> saved by the following 'mm_segment_t field' becoming
> naturally 64-bit aligned.
> 
> Signed-off-by: Joe Korty <joe.korty@...r.com>

applied, thanks Joe!

	Ingo
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