mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-09-22 09:34:56 +02:00
Masahiro Yamada
0f3dd4e09a
Kconfig generates include/generated/autoconf.h to make CONFIG options
available to the pre-processor. Symbols with the value 'm' are suffixed
with '_MODULE'
Here is a conflict; CONFIG_FOO=m results in '#define CONFIG_FOO_MODULE 1',
but CONFIG_FOO_MODULE=y also results in the same define.
Also, CONFIG options that end with '_MODULE' confuse the Kconfig/fixdep
interaction; fixdep always assumes CONFIG_FOO_MODULE comes from
CONFIG_FOO=m, so the dependency is not properly tracked for symbols
that end with '_MODULE'.
For these reasons, CONFIG options that end with '_MODULE' should be
avoided in general. (I am planning on adding a check in Kconfig.)
This is the only case in the current kernel.
The new option name was suggested by Péter Ujfalusi. [1]
[1] https://lore.kernel.org/all/d9e777dc-d274-92ee-4d77-711bfd553611@gmail.com/
Fixes: 147162f575 ("ASoC: ti: fix SND_SOC_DM365_VOICE_CODEC dependencies")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Link: https://lore.kernel.org/r/20210901164009.1546967-1-masahiroy@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.