From c3d5669e671985676efbb85697c92071f73d9080 Mon Sep 17 00:00:00 2001 From: Matthias Kaehlcke Date: Fri, 21 Apr 2017 16:00:56 -0700 Subject: [PATCH] CHROMIUM: arm64: Disable asm-operand-width warning for clang clang raises 'asm-operand-widths' warnings in inline assembly code when the size of an operand is < 64 bits and the operand width is unspecified. Most warnings are raised in macros, i.e. the datatype of the operand may vary. Most of these warnings are fixed in upstream, however we consider it isn't worth the effort/risk to backport all the necessary changes. On future CrOS kernels >= v4.13 the warning should be re-enabled. Change-Id: Ie44748344853f5a394879718ad5d6f610f3c396a Signed-off-by: Matthias Kaehlcke --- arch/arm64/Makefile | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index 13a64c9b1e4a..ab2298155a22 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -77,6 +77,10 @@ else TEXT_OFFSET := 0x00080000 endif +ifeq ($(cc-name),clang) +KBUILD_CFLAGS += $(call cc-disable-warning, asm-operand-widths) +endif + # KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61) # in 32-bit arithmetic KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \