When KMEMCHECK is enabled without UNWINDER_FRAME_POINTER, we get a
Kconfig warning, presumably harmless:
warning: (FAULT_INJECTION_STACKTRACE_FILTER && LATENCYTOP && KMEMCHECK &&
LOCKDEP && UNWINDER_FRAME_POINTER) selects FRAME_POINTER which has unmet direct
dependencies (DEBUG_KERNEL && (CRIS || M68K || FRV || UML || SUPERH || BLACKFIN
|| MN10300 || METAG) || ARCH_WANT_FRAME_POINTERS || !UNWINDER_ORC &&
!UNWINDER_GUESS)
In newer mainline kernels, the KMEMCHECK option has been removed, so
this no longer happens. Adding the unwinder as a direct dependency
for KMEMCHECK works for 4.14-stable as well and documents the
dependency better.
Fixes: 81d387190039 ("x86/kconfig: Consolidate unwinders into multiple choice
selection")
Cc: Josh Poimboeuf <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
---
arch/x86/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 17de6acc0eab..3fc58c1a166b 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -111,7 +111,7 @@ config X86
select HAVE_ARCH_JUMP_LABEL
select HAVE_ARCH_KASAN if X86_64
select HAVE_ARCH_KGDB
- select HAVE_ARCH_KMEMCHECK
+ select HAVE_ARCH_KMEMCHECK if !UNWINDER_ORC &&
!UNWINDER_GUESS
select HAVE_ARCH_MMAP_RND_BITS if MMU
select HAVE_ARCH_MMAP_RND_COMPAT_BITS if MMU && COMPAT
select HAVE_ARCH_COMPAT_MMAP_BASES if MMU && COMPAT
--
2.9.0
