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

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Date:	Sat, 18 Jun 2011 08:44:36 -0700 (PDT)
From:	Hugh Dickins <hughd@...gle.com>
To:	"Robert P. J. Day" <rpjday@...shcourse.ca>
cc:	Randy Dunlap <rdunlap@...otime.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>
Subject: Re: [PATCH v2] TMPFS: Expand "help" to explain value of
 TMPFS_POSIX_ACL

On Sat, 18 Jun 2011, Randy Dunlap wrote:
> 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>

Yes, that's good, Robert, thanks - I'm glad I left the writing to you.

Acked-by: Hugh Dickins <hughd@...gle.com>

> 
> 
> > ---
> > 
> > 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
> > 
> > -- 
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