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 jpoimboe@redhat.com Signed-off-by: Arnd Bergmann arnd@arndb.de --- 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