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driver core: remove CONFIG_SYSFS_DEPRECATED_V2 but keep it for block devices

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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>
This commit is contained in:
Kay Sievers
2010-09-04 22:33:14 -07:00
committed by Greg Kroah-Hartman
parent 807508c8ff
commit 39aba963d9
8 changed files with 44 additions and 260 deletions
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init/Kconfig
+11 -27
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@@ -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.
This option switches the layout of the "block" class devices, to not
show up in /sys/class/block/, but only in /sys/block/.
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 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.
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.
Recent distributions and userspace tools after 2009/2010 depend on
the existence of /sys/class/block/, and will not work with this
option enabled.
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.
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)"