linux-kernel - Re: [PATCH] kernel/ksysfs.c:fix dependence on CONFIG

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Message-Id: <20081118153818.e623ba03.akpm@linux-foundation.org>
Date:	Tue, 18 Nov 2008 15:38:18 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	tom.leiming@...il.com
Cc:	kay.sievers@...y.org, greg@...ah.com, linux-kernel@...r.kernel.org,
	tom.leiming@...il.com
Subject: Re: [PATCH] kernel/ksysfs.c:fix dependence on CONFIG_NET

On Sun, 16 Nov 2008 18:22:09 +0800
tom.leiming@...il.com wrote:

> From: Ming Lei <tom.leiming@...il.com>
> 
> Access to uevent_seqnum and uevent_helper does not need to
> depend on CONFIG_NET, so remove it.
> 
> Signed-off-by: Ming Lei <tom.leiming@...il.com>
> ---
>  kernel/ksysfs.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c
> index 08dd8ed..528dd78 100644
> --- a/kernel/ksysfs.c
> +++ b/kernel/ksysfs.c
> @@ -24,7 +24,7 @@ static struct kobj_attribute _name##_attr = __ATTR_RO(_name)
>  static struct kobj_attribute _name##_attr = \
>  	__ATTR(_name, 0644, _name##_show, _name##_store)
>  
> -#if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
> +#if defined(CONFIG_HOTPLUG)
>  /* current uevent sequence number */
>  static ssize_t uevent_seqnum_show(struct kobject *kobj,
>  				  struct kobj_attribute *attr, char *buf)
> @@ -137,7 +137,7 @@ struct kobject *kernel_kobj;
>  EXPORT_SYMBOL_GPL(kernel_kobj);
>  
>  static struct attribute * kernel_attrs[] = {
> -#if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
> +#if defined(CONFIG_HOTPLUG)
>  	&uevent_seqnum_attr.attr,
>  	&uevent_helper_attr.attr,
>  #endif

I think the story here is that uevent uses netlink, and with
CONFIG_NET=n, we have no netlink, so that code couldn't do anything
anyway.

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