linux-kernel - Re: [PATCH v2] TMPFS: Expand "help" to explain value of TMPFS_POSIX

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Message-Id: <20110618081134.fbafed0f.rdunlap@xenotime.net>
Date:	Sat, 18 Jun 2011 08:11:34 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	"Robert P. J. Day" <rpjday@...shcourse.ca>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	hughd@...gle.com, Andrew Morton <akpm@...l.org>
Subject: Re: [PATCH v2] TMPFS: Expand "help" to explain value of
 TMPFS_POSIX_ACL

On Sat, 18 Jun 2011 11:10:20 -0400 (EDT) Robert P. J. Day wrote:

> 
> Expand the fs/Kconfig "help" info to clarify why it's a bad idea to
> deselect the TMPFS_POSIX_ACL config variable.
> 
> Signed-off-by: Robert P. J. Day <rpjday@...shcourse.ca>

Acked-by: Randy Dunlap <rdunlap@...otime.net>


> ---
> 
> diff --git a/fs/Kconfig b/fs/Kconfig
> index 19891aa..4217543 100644
> --- a/fs/Kconfig
> +++ b/fs/Kconfig
> @@ -127,14 +127,20 @@ config TMPFS_POSIX_ACL
>  	select TMPFS_XATTR
>  	select GENERIC_ACL
>  	help
> -	  POSIX Access Control Lists (ACLs) support permissions for users and
> -	  groups beyond the owner/group/world scheme.
> +	  POSIX Access Control Lists (ACLs) support additional access rights
> +	  for users and groups beyond the standard owner/group/world scheme,
> +	  and this option selects support for ACLs specifically for tmpfs
> +	  filesystems.
> +
> +	  If you've selected TMPFS, you almost certainly want this option
> +	  as well since a number of user space features (e.g., ALSA sound)
> +	  require POSIX ACL support under /dev to work properly.  In other
> +	  words, if you're not sure and you have no *compelling* reason to
> +	  deselect this feature, say Y.
> 
>  	  To learn more about Access Control Lists, visit the POSIX ACLs for
>  	  Linux website <http://acl.bestbits.at/>.
> 
> -	  If you don't know what Access Control Lists are, say N.
> -
>  config TMPFS_XATTR
>  	bool "Tmpfs extended attributes"
>  	depends on TMPFS
> 
> -- 
> 
> ========================================================================
> Robert P. J. Day                                 Ottawa, Ontario, CANADA
>                         http://crashcourse.ca
> 
> Twitter:                                       http://twitter.com/rpjday
> LinkedIn:                               http://ca.linkedin.com/in/rpjday
> ========================================================================
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---
~Randy
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