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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-02-23 08:33:26 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-06 07:46:23 +0100 |
| commit | 721da5cee9d43901105f5b8bd33fcb9101b12fc3 (patch) | |
| tree | 944a3183b2a459b0d2b0bf5ce56c1ff1113ae7ef /init/Kconfig | |
| parent | Linux 6.3-rc1 (diff) | |
| download | linux-721da5cee9d43901105f5b8bd33fcb9101b12fc3.tar.xz linux-721da5cee9d43901105f5b8bd33fcb9101b12fc3.zip | |
driver core: remove CONFIG_SYSFS_DEPRECATED and CONFIG_SYSFS_DEPRECATED_V2
CONFIG_SYSFS_DEPRECATED was added in commit 88a22c985e35
("CONFIG_SYSFS_DEPRECATED") in 2006 to allow systems with older versions
of some tools (i.e. Fedora 3's version of udev) to boot properly. Four
years later, in 2010, the option was attempted to be removed as most of
userspace should have been fixed up properly by then, but some kernel
developers clung to those old systems and refused to update, so we added
CONFIG_SYSFS_DEPRECATED_V2 in commit e52eec13cd6b ("SYSFS: Allow boot
time switching between deprecated and modern sysfs layout") to allow
them to continue to boot properly, and we allowed a boot time parameter
to be used to switch back to the old format if needed.
Over time, the logic that was covered under these config options was
slowly removed from individual driver subsystems successfully, removed,
and the only thing that is now left in the kernel are some changes in
the block layer's representation in sysfs where real directories are
used instead of symlinks like normal.
Because the original changes were done to userspace tools in 2006, and
all distros that use those tools are long end-of-life, and older
non-udev-based systems do not care about the block layer's sysfs
representation, it is time to finally remove this old logic and the
config entries from the kernel.
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: linux-block@vger.kernel.org
Cc: linux-doc@vger.kernel.org
Acked-by: Jens Axboe <axboe@kernel.dk>
Link: https://lore.kernel.org/r/20230223073326.2073220-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'init/Kconfig')
| -rw-r--r-- | init/Kconfig | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/init/Kconfig b/init/Kconfig index 1fb5f313d18f..4464ef98ea0b 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1297,44 +1297,6 @@ config SCHED_AUTOGROUP desktop applications. Task group autogeneration is currently based upon task session. -config SYSFS_DEPRECATED - bool "Enable deprecated sysfs features to support old userspace tools" - depends on SYSFS - default n - help - This option adds code that switches the layout of the "block" class - devices, to not show up in /sys/class/block/, but only in - /sys/block/. - - This switch is only active when the sysfs.deprecated=1 boot option is - passed or the SYSFS_DEPRECATED_V2 option is set. - - 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. - -config SYSFS_DEPRECATED_V2 - bool "Enable deprecated sysfs features by default" - default n - depends on SYSFS - depends on SYSFS_DEPRECATED - help - Enable deprecated sysfs by default. - - See the CONFIG_SYSFS_DEPRECATED option for more details about this - option. - - Only if you are using a new kernel on an old distribution, you might - need to say Y here. Even then, odds are you would not need it - enabled, you can always pass the boot option if absolutely necessary. - config RELAY bool "Kernel->user space relay support (formerly relayfs)" select IRQ_WORK |