From bb31074db95f735004203b307e63e2e0d4ef9c26 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 11 May 2022 14:05:31 +0200 Subject: [PATCH] s390/boot: do not emit debug info for assembly with llvm's IAS Commit ee6d777d3e93 ("s390/decompressor: support extra debug flags") added extra debug flags, in particular debug info is created, depending on config options. With llvm's IAS this causes this compile warning: arch/s390/boot/head.S:38:1: warning: DWARF2 only supports one section per compilation unit .section ".head.text","ax" ^ This is a known problem and was addressed with commit b8a9092330da ("Kbuild: do not emit debug info for assembly with LLVM_IAS=1"). Just do the same for s390 to get rid of this warning. Tested-by: Nathan Chancellor Tested-by: Nick Desaulniers Link: https://lore.kernel.org/r/20220511120532.2228616-8-hca@linux.ibm.com Signed-off-by: Heiko Carstens --- arch/s390/Makefile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/s390/Makefile b/arch/s390/Makefile index e441b60b1812..12037c9e3802 100644 --- a/arch/s390/Makefile +++ b/arch/s390/Makefile @@ -20,7 +20,9 @@ LDFLAGS_vmlinux := -pie endif aflags_dwarf := -Wa,-gdwarf-2 KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__ +ifndef CONFIG_AS_IS_LLVM KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf)) +endif KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2 -mpacked-stack KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float -mbackchain