linux-kernel - Re: [PATCH] ext4: Reduce object size when !CONFIG

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Message-ID: <20130618151438.GC7359@thunk.org>
Date:	Tue, 18 Jun 2013 11:14:38 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Joe Perches <joe@...ches.com>
Cc:	linux-kernel@...r.kernel.org,
	Dave Kleikamp <dave.kleikamp@...cle.com>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-embedded@...r.kernel.org,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	linux-ext4@...r.kernel.org
Subject: Re: [PATCH] ext4: Reduce object size when !CONFIG_PRINTK

On Tue, Jun 04, 2013 at 07:55:05PM -0700, Joe Perches wrote:
> Reduce the object size ~10% could be useful for embedded
> systems.
> 
> Add #ifdef CONFIG_PRINTK #else #endif blocks
> to hold formats and arguments, passing " " to
> functions when !CONFIG_PRINTK and still verifying
> format and arguments with no_printk.
> 
> $ size fs/ext4/built-in.o*
>    text	   data	    bss	    dec	    hex	filename
>  239375	    610	    888	 240873	  3ace9	fs/ext4/built-in.o.new
>  264167	    738	    888	 265793	  40e41	fs/ext4/built-in.o.old
> 
>     $ grep -E "CONFIG_EXT4|CONFIG_PRINTK" .config
>     # CONFIG_PRINTK is not set
>     CONFIG_EXT4_FS=y
>     CONFIG_EXT4_USE_FOR_EXT23=y
>     CONFIG_EXT4_FS_POSIX_ACL=y
>     # CONFIG_EXT4_FS_SECURITY is not set
>     # CONFIG_EXT4_DEBUG is not set
> 
> Signed-off-by: Joe Perches <joe@...ches.com>

Applied, thanks.

					- Ted
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