diff options
author | Stephen Rothwell <sfr@canb.auug.org.au> | 2010-09-09 12:01:36 +1000 |
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committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2010-09-09 12:01:36 +1000 |
commit | 057f6d050921efcbb5d8463fcb549e105814f1e2 (patch) | |
tree | 13f00cd3ea48857afced2fdc3cac5117d4e96f2b /init | |
parent | 20beabdbd3f5eb9d304d04a7103dc264a39b9005 (diff) | |
parent | e87e1a8a5b847e733e254a701c09bfbeebc80f99 (diff) |
Merge branch 'quilt/driver-core'
Diffstat (limited to 'init')
-rw-r--r-- | init/Kconfig | 46 |
1 files changed, 15 insertions, 31 deletions
diff --git a/init/Kconfig b/init/Kconfig index 76b8ed777489..51269b102d2b 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -674,40 +674,24 @@ 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)" |