Why do some config options return limited info from a search?
I'm trying to build the required options for my Laptop into the kernel, so not modules. When you search, in make menuconfig, for a config option you usually get very useful info about where it is, in the menus, and what its prompt is. This makes them easier to find. Sometimes however you get a module which don't give this information. Is this intentional, signify something, or just an oversight for that config option? For example SND_HDA_CORE: Symbol: SND_HDA_CORE [=m] Type : tristate Defined at sound/hda/Kconfig:1 Depends on: SOUND [=y] && !UML && SND [=y] Selects: REGMAP [=y] Selected by: - SND_HDA_EXT_CORE [=m] && SOUND [=y] && !UML && SND [=y] - SND_HDA [=m] && SOUND [=y] && !UML && SND [=y]
On Mon, 19 Mar 2018 00:08:10 -0000, John Whitmore said:
Sometimes however you get a module which don't give this information. Is this intentional, signify something, or just an oversight for that config option? For example SND_HDA_CORE:
Symbol: SND_HDA_CORE [=m] Type : tristate Defined at sound/hda/Kconfig:1 Depends on: SOUND [=y] && !UML && SND [=y] Selects: REGMAP [=y] Selected by: - SND_HDA_EXT_CORE [=m] && SOUND [=y] && !UML && SND [=y] - SND_HDA [=m] && SOUND [=y] && !UML && SND [=y]
Some internal symbols don't have any visible menu-selects, because they are intended to be turned on only via other things doing 'SELECT'. After all, SND_HDA_CORE has little to no reason to be enabled unless your kernel build config asks for SND_HDA or SND_HDA_EXT_CORE (and *that* symbol is 'm', which is why SND_HDA_CORE is also ''m'. Switching EXT_CORE to 'y' will then auto-switch this one to 'y' as well).
On Sun, Mar 18, 2018 at 08:49:52PM -0400, valdis.kletnieks@vt.edu wrote:
On Mon, 19 Mar 2018 00:08:10 -0000, John Whitmore said:
Sometimes however you get a module which don't give this information. Is this intentional, signify something, or just an oversight for that config option? For example SND_HDA_CORE:
Symbol: SND_HDA_CORE [=m] Type : tristate Defined at sound/hda/Kconfig:1 Depends on: SOUND [=y] && !UML && SND [=y] Selects: REGMAP [=y] Selected by: - SND_HDA_EXT_CORE [=m] && SOUND [=y] && !UML && SND [=y] - SND_HDA [=m] && SOUND [=y] && !UML && SND [=y]
Some internal symbols don't have any visible menu-selects, because they are intended to be turned on only via other things doing 'SELECT'. After all, SND_HDA_CORE has little to no reason to be enabled unless your kernel build config asks for SND_HDA or SND_HDA_EXT_CORE (and *that* symbol is 'm', which is why SND_HDA_CORE is also ''m'. Switching EXT_CORE to 'y' will then auto-switch this one to 'y' as well).
Perfectly logical and simple. Thanks for your answer that now all makes sense.
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John Whitmore -
valdis.kletnieks＠vt.edu