[PATCH] TMPFS: Expand "help" to explain value of TMPFS_POSIX_ACL

["Robert P. J. Day" <rpjday@crashcourse.ca>]

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@crashcourse.ca>

---

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 (ie., 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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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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