From: "J.A. Magallon" <jamagallon@able.es>
To: linux-kernel@vger.kernel.org
Cc: Dave Jones <davej@codemonkey.org.uk>
Subject: Re: Fwd: struct inode size reduction.
Date: Sun, 9 Mar 2003 23:45:52 +0100 [thread overview]
Message-ID: <20030309224552.GA3047@werewolf.able.es> (raw)
In-Reply-To: <20030309135402.GB32107@suse.de>; from davej@codemonkey.org.uk on Sun, Mar 09, 2003 at 14:54:03 +0100
On 03.09, Dave Jones wrote:
> Third retry, perhaps it'll make it through to the list
> now that vger is sending mail again...
>
If you do not need gcc-2.95 support, you can use anonymous unions:
+ union {
+ struct pipe_inode_info *i_pipe;
+ struct block_device *i_bdev;
+ struct char_device *i_cdev;
+ };
so you don't even have to change the accesses. Zero cost optimization patch.
I have tested on gcc-3.0, 3.2.2, RH gcc-2.96-98, and 2.95.2. Only 2.95.2
fails.
I do not know the compiler requirements for 2.5, or if there is any agreement
in kernel developement for not doing this. If this is the case, sorry for
the noise.
--
J.A. Magallon <jamagallon@able.es> \ Software is like sex:
werewolf.able.es \ It's better when it's free
Mandrake Linux release 9.1 (Cooker) for i586
Linux 2.4.21-pre5-jam0 (gcc 3.2.2 (Mandrake Linux 9.1 3.2.2-3mdk))
next prev parent reply other threads:[~2003-03-09 22:35 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-09 13:54 Fwd: struct inode size reduction Dave Jones
2003-03-09 17:13 ` Andries Brouwer
2003-03-09 20:33 ` Dave Jones
2003-03-09 19:55 ` Christoph Hellwig
2003-03-09 20:31 ` Andries Brouwer
2003-03-09 22:18 ` Roman Zippel
2003-03-09 23:08 ` Andries Brouwer
2003-03-10 2:23 ` Alexander Viro
2003-03-10 10:58 ` Roman Zippel
2003-03-10 12:05 ` Andries Brouwer
2003-03-10 16:25 ` Roman Zippel
2003-03-10 17:32 ` Andries Brouwer
2003-03-10 18:39 ` Roman Zippel
2003-03-09 22:45 ` J.A. Magallon [this message]
2003-03-10 0:11 ` Dave Jones
2003-03-09 23:59 ` J.A. Magallon
2003-03-10 5:04 ` Miles Bader
-- strict thread matches above, loose matches on Subject: below --
2003-03-10 9:30 Fwd: " Andries.Brouwer
2003-03-10 9:32 Andries.Brouwer
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