linux-kernel - [PATCH 0/1] MIPS: fix the "CPU type" choice structure

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Date: Sun, 28 Jan 2024 01:23:08 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	linux-mips@...r.kernel.org
Cc: linux-kbuild@...r.kernel.org,
	Masahiro Yamada <masahiroy@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/1] MIPS: fix the "CPU type" choice structure

The bool type "choice" is meant to list exclusively selected config
options.

Unless you are familiar with the Kconfig internals, you will not
understand how CONFIG_B can be enabled in the following code:

  choice
         prompt "Choose one of them, but how to choose B?"

  config A
          bool "A"

  config B
          bool "B"
          depends on A

  config C
          bool "C"

  endchoice

B is not a choice value because it becomes a child of A, as a side-effect
of re-paranting in menu_finalize().
It is unreadable, and I even consider it as a bug.
My plan is to forbid such a silly choice structure.

Just write as follows:

  choice
          prompt "Choose one of them"

  config A
          bool "A"

  config C
          bool "C"

  endchoice

  config B
          bool "B"
          depends on A

Fortunately, arch/mips/Kconfig seems to be the only file I need to fix.

Masahiro Yamada (1):
  MIPS: move unselectable entries out of the "CPU type" choice

 arch/mips/Kconfig | 76 +++++++++++++++++++++++------------------------
 1 file changed, 38 insertions(+), 38 deletions(-)

-- 
2.40.1