Commit 5a958db3 authored by Kees Cook's avatar Kees Cook

make CONFIG_EXPERIMENTAL invisible and default

This config item has not carried much meaning for a while now and is
almost always enabled by default (especially in distro builds). As agreed
during the Linux kernel summit, it should be removed. As a first step,
remove it from being listed, and default it to on. Once it has been
removed from all subsystem Kconfigs, it will be dropped entirely.

For items that really are experimental, maintainers should use "default
n", optionally include "(EXPERIMENTAL)" in the title, and add language to
the help text indicating why the item should be considered experimental.

For items that are dangerously experimental, the maintainer is encouraged
to follow the above title recommendation, add stronger language to the
help text, and optionally use (depending on the extent of the danger,
from least to most dangerous): printk(), add_taint(TAINT_WARN),
add_taint(TAINT_CRAP), WARN_ON(1), and CONFIG_BROKEN.

CC: Greg KH <gregkh@linuxfoundation.org>
CC: "Eric W. Biederman" <ebiederm@xmission.com>
CC: Serge Hallyn <serge.hallyn@canonical.com>
CC: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: default avatarKees Cook <keescook@chromium.org>
Acked-by: default avatarSerge Hallyn <serge.hallyn@canonical.com>
Acked-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 9931faca
......@@ -33,35 +33,8 @@ config BUILDTIME_EXTABLE_SORT
menu "General setup"
config EXPERIMENTAL
bool "Prompt for development and/or incomplete code/drivers"
---help---
Some of the various things that Linux supports (such as network
drivers, file systems, network protocols, etc.) can be in a state
of development where the functionality, stability, or the level of
testing is not yet high enough for general use. This is usually
known as the "alpha-test" phase among developers. If a feature is
currently in alpha-test, then the developers usually discourage
uninformed widespread use of this feature by the general public to
avoid "Why doesn't this work?" type mail messages. However, active
testing and use of these systems is welcomed. Just be aware that it
may not meet the normal level of reliability or it may fail to work
in some special cases. Detailed bug reports from people familiar
with the kernel internals are usually welcomed by the developers
(before submitting bug reports, please read the documents
<file:README>, <file:MAINTAINERS>, <file:REPORTING-BUGS>,
<file:Documentation/BUG-HUNTING>, and
<file:Documentation/oops-tracing.txt> in the kernel source).
This option will also make obsoleted drivers available. These are
drivers that have been replaced by something else, and/or are
scheduled to be removed in a future kernel release.
Unless you intend to help test and develop a feature or driver that
falls into this category, or you have a situation that requires
using these features, you should probably say N here, which will
cause the configurator to present you with fewer choices. If
you say Y here, you will be offered the choice of using features or
drivers that are currently considered to be in the alpha-test phase.
bool
default y
config BROKEN
bool
......
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