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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-26 22:27:09 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-26 22:27:09 -0700 |
| commit | f429d35588847fa1048f9dbdcc3cc1ee1b530041 (patch) | |
| tree | 9c54202c7beb91fa3b76b4f18dc759c570ff1ef9 /Documentation | |
| parent | 5b26fc8824da15a2fe9df89338a5a3cad41ba8ee (diff) | |
| parent | fa64e5f6a35efd5e77d639125d973077ca506074 (diff) | |
Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kconfig update from Michal Marek:
- fix for behavior of tristate choice items and fix for documentation
of existing kconfig behavior [Dirk Gouders]
- more helpful "unexpected data" kconfig warning [Paul Bolle]
* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
kconfig/symbol.c: handle choice_values that depend on 'm' symbols
kconfig-language: elaborate on the type of a choice
kconfig-language: fix comment on dependency-generated menu structures.
kconfig: add unexpected data itself to warning
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/kbuild/kconfig-language.txt | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/Documentation/kbuild/kconfig-language.txt b/Documentation/kbuild/kconfig-language.txt index c52856da0cad..db101857b2c9 100644 --- a/Documentation/kbuild/kconfig-language.txt +++ b/Documentation/kbuild/kconfig-language.txt @@ -241,9 +241,8 @@ comment "module support disabled" depends on !MODULES MODVERSIONS directly depends on MODULES, this means it's only visible if -MODULES is different from 'n'. The comment on the other hand is always -visible when MODULES is visible (the (empty) dependency of MODULES is -also part of the comment dependencies). +MODULES is different from 'n'. The comment on the other hand is only +visible when MODULES is set to 'n'. Kconfig syntax @@ -285,12 +284,17 @@ choices: "endchoice" This defines a choice group and accepts any of the above attributes as -options. A choice can only be of type bool or tristate, while a boolean -choice only allows a single config entry to be selected, a tristate -choice also allows any number of config entries to be set to 'm'. This -can be used if multiple drivers for a single hardware exists and only a -single driver can be compiled/loaded into the kernel, but all drivers -can be compiled as modules. +options. A choice can only be of type bool or tristate. If no type is +specified for a choice, it's type will be determined by the type of +the first choice element in the group or remain unknown if none of the +choice elements have a type specified, as well. + +While a boolean choice only allows a single config entry to be +selected, a tristate choice also allows any number of config entries +to be set to 'm'. This can be used if multiple drivers for a single +hardware exists and only a single driver can be compiled/loaded into +the kernel, but all drivers can be compiled as modules. + A choice accepts another option "optional", which allows to set the choice to 'n' and no entry needs to be selected. If no [symbol] is associated with a choice, then you can not have multiple |