bpf, kconfig: Fix DEBUG_INFO_BTF_MODULES Kconfig definition

[ Upstream commit 229087f6f1dc2d0c38feba805770f28529980ec0 ]

Turns out that due to CONFIG_DEBUG_INFO_BTF_MODULES not having an
explicitly specified "menu item name" in Kconfig, it's basically
impossible to turn it off (see [0]).

This patch fixes the issue by defining menu name for
CONFIG_DEBUG_INFO_BTF_MODULES, which makes it actually adjustable
and independent of CONFIG_DEBUG_INFO_BTF, in the sense that one can
have DEBUG_INFO_BTF=y and DEBUG_INFO_BTF_MODULES=n.

We still keep it as defaulting to Y, of course.

Fixes: 5f9ae91f7c0d ("kbuild: Build kernel module BTFs if BTF is enabled and pahole supports it")
Reported-by: Vincent Li <vincent.mc.li@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/CAK3+h2xiFfzQ9UXf56nrRRP=p1+iUxGoEP5B+aq9MDT5jLXDSg@mail.gmail.com
Link: https://lore.kernel.org/bpf/20240404220344.3879270-1-andrii@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 28faea9b5da625fae23cdf1fc9175b036d356cd2..2025b624fbb67743efe6a5de3f430b0a1efed7a7 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -319,7 +319,7 @@ config DEBUG_INFO_DWARF5
 endchoice # "DWARF version"
 
 config DEBUG_INFO_BTF
-       bool "Generate BTF typeinfo"
+       bool "Generate BTF type information"
        depends on !DEBUG_INFO_SPLIT && !DEBUG_INFO_REDUCED
        depends on !GCC_PLUGIN_RANDSTRUCT || COMPILE_TEST
        help
@@ -331,7 +331,8 @@ config PAHOLE_HAS_SPLIT_BTF
        def_bool PAHOLE_VERSION >= 119
 
 config DEBUG_INFO_BTF_MODULES
-       def_bool y
+       bool "Generate BTF type information for kernel modules"
+       default y
        depends on DEBUG_INFO_BTF && MODULES && PAHOLE_HAS_SPLIT_BTF
        help
          Generate compact split BTF type information for kernel modules.