linux-kernel - Re: [PATCH 2/7] sysfs: Pack sysfs

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Message-ID: <4B4BC540.1090609@kernel.org>
Date:	Tue, 12 Jan 2010 09:41:36 +0900
From:	Tejun Heo <tj@...nel.org>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Greg Kroah-Hartman <gregkh@...e.de>,
	Kay Sievers <kay.sievers@...y.org>,
	linux-kernel@...r.kernel.org,
	Cornelia Huck <cornelia.huck@...ibm.com>,
	linux-fsdevel@...r.kernel.org,
	Eric Dumazet <eric.dumazet@...il.com>,
	Benjamin LaHaise <bcrl@...et.ca>,
	Serge Hallyn <serue@...ibm.com>,
	"Eric W. Biederman" <ebiederm@...stanetworks.com>
Subject: Re: [PATCH 2/7] sysfs: Pack sysfs_dirent more tightly.

On 01/12/2010 05:21 AM, Eric W. Biederman wrote:
> From: Eric W. Biederman <ebiederm@...stanetworks.com>
> 
> Placing the 16bit s_mode between a pointer and a long doesn't pack well
> especailly on 64bit where we wast 48 bits.  So move s_mode and
> declare it as a unsigned short.  This is the sysfs backing store
> after all we don't need fields extra large just in case someday
> we want userspace to be able to use a larger value.
> 
> Signed-off-by: Eric W. Biederman <ebiederm@...stanetworks.com>

Acked-by: Tejun Heo <tj@...nel.org>

-- 
tejun
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