From: Boris Kolpackov <boris@codesynthesis.com> To: Masahiro Yamada <masahiroy@kernel.org> Cc: linux-kbuild@vger.kernel.org, "David S. Miller" <davem@davemloft.net>, Jakub Kicinski <kuba@kernel.org>, Jaroslav Kysela <perex@perex.cz>, Kalle Valo <kvalo@codeaurora.org>, Liam Girdwood <lgirdwood@gmail.com>, Luca Coelho <luciano.coelho@intel.com>, Mark Brown <broonie@kernel.org>, Peter Ujfalusi <peter.ujfalusi@gmail.com>, Takashi Iwai <tiwai@suse.com>, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [PATCH] kconfig: forbid symbols that end with '_MODULE' Date: Wed, 25 Aug 2021 17:34:37 +0200 [thread overview] Message-ID: <boris.20210825172545@codesynthesis.com> (raw) In-Reply-To: <20210825041637.365171-1-masahiroy@kernel.org> Masahiro Yamada <masahiroy@kernel.org> writes: > Kconfig (syncconfig) generates include/generated/autoconf.h to make > CONFIG options available to the pre-processor. > > The macros are suffixed with '_MODULE' for symbols with the value 'm'. > > 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. > > fixdep always assumes CONFIG_FOO_MODULE comes from CONFIG_FOO=m, so the > dependency is not properly tracked for symbols that end with '_MODULE'. It seem to me the problem is in autoconf.h/fixdep, not in the Kconfig language. > This commit makes Kconfig error out if it finds a symbol suffixed with > '_MODULE'. I know you don't care, but I will voice my objection, for the record: Kconfig is used by projects other than the Linux kernel and some of them do not use the autoconf.h functionality. For such projects this restriction seems arbitrary and potentially backwards-incompatible.
WARNING: multiple messages have this Message-ID (diff)
From: Boris Kolpackov <boris@codesynthesis.com> To: Masahiro Yamada <masahiroy@kernel.org> Cc: alsa-devel@alsa-project.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, Takashi Iwai <tiwai@suse.com>, linux-wireless@vger.kernel.org, Liam Girdwood <lgirdwood@gmail.com>, Mark Brown <broonie@kernel.org>, Luca Coelho <luciano.coelho@intel.com>, netdev@vger.kernel.org, Jakub Kicinski <kuba@kernel.org>, Peter Ujfalusi <peter.ujfalusi@gmail.com>, "David S. Miller" <davem@davemloft.net>, Kalle Valo <kvalo@codeaurora.org> Subject: Re: [PATCH] kconfig: forbid symbols that end with '_MODULE' Date: Wed, 25 Aug 2021 17:34:37 +0200 [thread overview] Message-ID: <boris.20210825172545@codesynthesis.com> (raw) In-Reply-To: <20210825041637.365171-1-masahiroy@kernel.org> Masahiro Yamada <masahiroy@kernel.org> writes: > Kconfig (syncconfig) generates include/generated/autoconf.h to make > CONFIG options available to the pre-processor. > > The macros are suffixed with '_MODULE' for symbols with the value 'm'. > > 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. > > fixdep always assumes CONFIG_FOO_MODULE comes from CONFIG_FOO=m, so the > dependency is not properly tracked for symbols that end with '_MODULE'. It seem to me the problem is in autoconf.h/fixdep, not in the Kconfig language. > This commit makes Kconfig error out if it finds a symbol suffixed with > '_MODULE'. I know you don't care, but I will voice my objection, for the record: Kconfig is used by projects other than the Linux kernel and some of them do not use the autoconf.h functionality. For such projects this restriction seems arbitrary and potentially backwards-incompatible.
next prev parent reply other threads:[~2021-08-25 15:42 UTC|newest] Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-08-25 4:16 [PATCH] kconfig: forbid symbols that end with '_MODULE' Masahiro Yamada 2021-08-25 4:16 ` Masahiro Yamada 2021-08-25 9:52 ` Mark Brown 2021-08-25 9:52 ` Mark Brown 2021-08-25 11:59 ` Péter Ujfalusi 2021-08-25 11:59 ` Péter Ujfalusi 2021-08-26 2:28 ` Masahiro Yamada 2021-08-26 2:28 ` Masahiro Yamada 2021-09-01 7:07 ` Péter Ujfalusi 2021-09-01 7:07 ` Péter Ujfalusi 2021-08-25 15:34 ` Boris Kolpackov [this message] 2021-08-25 15:34 ` Boris Kolpackov 2021-08-26 2:24 ` Masahiro Yamada 2021-08-26 2:24 ` Masahiro Yamada 2021-08-26 12:16 ` Boris Kolpackov 2021-08-26 12:16 ` Boris Kolpackov
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