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Python is listed as an optional dependency, but this is not true, as: 1) arm (multi_v7_defconfig and other defconfigs) and arm64 defconfig needs it due to DRM_MSM dependencies; 2) CONFIG_LTO_CLANG runs a python script at scripts/Makefile.vmlinux_o; 3) kernel-doc is called during compilation when some DRM options like CONFIG_DRM_I915_WERROR are enabled; 4) allyesconfig/allmodconfig will enable CONFIG_* dependencies that needs it; 5) besides DRM, other subsystems seem to have logic calling *.py scripts. So, better document that and change the dependency from optional to mandatory to reflect the current needs. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Acked-by: Rob Herring (Arm) <robh@kernel.org> Acked-by: Akira Yokosawa <akiyks@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/b03b95b8d09358e81e4f27942839191f49b0ba80.1753806485.git.mchehab+huawei@kernel.org