driver core: remove CONFIG_SYSFS_DEPRECATED_V2 but keep it for block devices

This patch removes the old CONFIG_SYSFS_DEPRECATED_V2 config option,
but it keeps the logic around to handle block devices in the old manner
as some people like to run new kernel versions on old (pre 2007/2008)
distros.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: "James E.J. Bottomley" <James.Bottomley@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 15 insertions, 31 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 2de5b1c..137609f 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -656,40 +656,24 @@ config MM_OWNER
 	bool
 
 config SYSFS_DEPRECATED
-	bool
-
-config SYSFS_DEPRECATED_V2
 	bool "enable deprecated sysfs features to support old userspace tools"
 	depends on SYSFS
 	default n
-	select SYSFS_DEPRECATED
-	help
-	  This option switches the layout of sysfs to the deprecated
-	  version. Do not use it on recent distributions.
-
-	  The current sysfs layout features a unified device tree at
-	  /sys/devices/, which is able to express a hierarchy between
-	  class devices. If the deprecated option is set to Y, the
-	  unified device tree is split into a bus device tree at
-	  /sys/devices/ and several individual class device trees at
-	  /sys/class/. The class and bus devices will be connected by
-	  "<subsystem>:<name>" and the "device" links. The "block"
-	  class devices, will not show up in /sys/class/block/. Some
-	  subsystems will suppress the creation of some devices which
-	  depend on the unified device tree.
-
-	  This option is not a pure compatibility option that can
-	  be safely enabled on newer distributions. It will change the
-	  layout of sysfs to the non-extensible deprecated version,
-	  and disable some features, which can not be exported without
-	  confusing older userspace tools. Since 2007/2008 all major
-	  distributions do not enable this option, and ship no tools which
-	  depend on the deprecated layout or this option.
-
-	  If you are using a new kernel on an older distribution, or use
-	  older userspace tools, you might need to say Y here. Do not say Y,
-	  if the original kernel, that came with your distribution, has
-	  this option set to N.
+	help
+	  This option switches the layout of the "block" class devices, to not
+	  show up in /sys/class/block/, but only in /sys/block/.
+
+	  This option allows new kernels to run on old distributions and tools,
+	  which might get confused by /sys/class/block/. Since 2007/2008 all
+	  major distributions and tools handle this just fine.
+
+	  Recent distributions and userspace tools after 2009/2010 depend on
+	  the existence of /sys/class/block/, and will not work with this
+	  option enabled.
+
+	  Only if you are using a new kernel on an old distribution, you might
+	  need to say Y here. Never say Y, if the original kernel, that came
+	  with your distribution, has not set this option.
 
 config RELAY
 	bool "Kernel->user space relay support (formerly relayfs)"