5.4-stable review patch. If anyone has any objections, please let me know.
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From: Masahiro Yamada masahiroy@kernel.org
[ Upstream commit 66ee3636eddcc82ab82b539d08b85fb5ac1dff9b ]
It took me some time to understand the purpose of the tricky code at the end of arch/x86/Kconfig.debug.
Without it, the following would be shown:
WARNING: unmet direct dependencies detected for FRAME_POINTER
because
81d387190039 ("x86/kconfig: Consolidate unwinders into multiple choice selection")
removed 'select ARCH_WANT_FRAME_POINTERS'.
The correct and more straightforward approach should have been to move it where 'select FRAME_POINTER' is located.
Several architectures properly handle the conditional selection of ARCH_WANT_FRAME_POINTERS. For example, 'config UNWINDER_FRAME_POINTER' in arch/arm/Kconfig.debug.
Fixes: 81d387190039 ("x86/kconfig: Consolidate unwinders into multiple choice selection") Signed-off-by: Masahiro Yamada masahiroy@kernel.org Signed-off-by: Borislav Petkov (AMD) bp@alien8.de Acked-by: Josh Poimboeuf jpoimboe@kernel.org Link: https://lore.kernel.org/r/20240204122003.53795-1-masahiroy@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/Kconfig.debug | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index bf9cd83de7773..3abac9327b643 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -307,6 +307,7 @@ config UNWINDER_ORC
config UNWINDER_FRAME_POINTER bool "Frame pointer unwinder" + select ARCH_WANT_FRAME_POINTERS select FRAME_POINTER ---help--- This option enables the frame pointer unwinder for unwinding kernel @@ -334,7 +335,3 @@ config UNWINDER_GUESS overhead.
endchoice - -config FRAME_POINTER - depends on !UNWINDER_ORC && !UNWINDER_GUESS - bool