linux-kernel - Re: 2.6.25-rc regression: kernel panic on boot

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Date:	Wed, 5 Mar 2008 13:16:17 +0300
From:	Alexey Dobriyan <adobriyan@...ru>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Greg KH <gregkh@...e.de>, "Zhang, Rui" <rui.zhang@...el.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	kay.sievers@...y.org, Andrew Morton <akpm@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: 2.6.25-rc regression: kernel panic on boot

On Tue, Mar 04, 2008 at 02:54:47PM +0100, Ingo Molnar wrote:
> CONFIG_SYSFS_DEPRECATED=y changed its meaning recently and causes
> regressions in working setups that had SYSFS_DEPRECATED disabled.
> 
> so rename it to SYSFS_DEPRECATED_V2 so that testers pick up the new
> default via 'make oldconfig', even if their old .config's disabled
> CONFIG_SYSFS_DEPRECATED ...

It has all the same help text, so people who disabled it in the past
will disable again!

> --- linux.orig/init/Kconfig
> +++ linux/init/Kconfig
> @@ -367,9 +367,13 @@ config RESOURCE_COUNTERS
>  	depends on CGROUPS
>  
>  config SYSFS_DEPRECATED
> +	bool
> +
> +config SYSFS_DEPRECATED_V2
>  	bool "Create deprecated sysfs files"
>  	depends on SYSFS
>  	default y
> +	select SYSFS_DEPRECATED
>  	help
>  	  This option creates deprecated symlinks such as the
>  	  "device"-link, the <subsystem>:<name>-link, and the

Is anyone aware of a case when turning SYSFS_DEPRECATED back on also
breaks something? I mean, option can be simply removed and sysfs people
can finally stop breaking boxes.

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