linux-kernel - Re: [PATCH 1/7][QUOTA] Move sysctl management code under ifdef CONFIG

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Message-Id: <20071203133844.40804dab.akpm@linux-foundation.org>
Date:	Mon, 3 Dec 2007 13:38:44 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Pavel Emelyanov <xemul@...nvz.org>
Cc:	ebiederm@...ssion.com, linux-kernel@...r.kernel.org,
	devel@...nvz.org
Subject: Re: [PATCH 1/7][QUOTA] Move sysctl management code under ifdef
 CONFIG_SYSCTL

On Fri, 30 Nov 2007 16:02:50 +0300
Pavel Emelyanov <xemul@...nvz.org> wrote:

> This includes the tables themselves and the call to the
> register_sysctl_table(). Since this call is done from the __init
> call, I hope this is OK to keep the #ifdef inside the function, 
> rather than making proper helpers outside it.
> 
> Signed-off-by: Pavel Emelyanov <xemul@...nvz.org>
> 
> ---
> 
> diff --git a/fs/dquot.c b/fs/dquot.c
> index 50e7c2a..efee14d 100644
> --- a/fs/dquot.c
> +++ b/fs/dquot.c
> @@ -1821,6 +1821,7 @@ struct quotactl_ops vfs_quotactl_ops = {
>  	.set_dqblk	= vfs_set_dqblk
>  };
>  
> +#ifdef CONFIG_SYSCTL
>  static ctl_table fs_dqstats_table[] = {
>  	{
>  		.ctl_name	= FS_DQ_LOOKUPS,
> @@ -1918,6 +1919,7 @@ static ctl_table sys_table[] = {
>  	},
>  	{ .ctl_name = 0 },
>  };
> +#endif
>  
>  static int __init dquot_init(void)
>  {
> @@ -1926,7 +1928,9 @@ static int __init dquot_init(void)
>  
>  	printk(KERN_NOTICE "VFS: Disk quotas %s\n", __DQUOT_VERSION__);
>  
> +#ifdef CONFIG_SYSCTL
>  	register_sysctl_table(sys_table);
> +#endif
>  
>  	dquot_cachep = kmem_cache_create("dquot",
>  			sizeof(struct dquot), sizeof(unsigned long) * 4,

We should avoid the ifdefs around the register_sysctl_table() call.

At present the !CONFIG_SYSCTL implementation of register_sysctl_table() is
a non-inlined NULL-returning stub.  All we have to do is to inline that stub
then these ifdefs can go away.

The same applies to register_sysctl_paths().


If that's all agreeable then there isn't a lot of point in me merging these
seven patches.



btw, administrivia detail: please don't put the patch's subsystem
identifier in [].  IOW, this:

Subject: [PATCH 1/7][QUOTA] Move sysctl management code under ifdef CONFIG_SYSCTL

should have been

Subject: [PATCH 1/7] quota: move sysctl management code under ifdef CONFIG_SYSCTL

for reasons described in section 2 of
http://www.zip.com.au/~akpm/linux/patches/stuff/tpp.txt.


Thanks.

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