From 2b92e27f26f136b9c16a0ccb94a89ff599814675 Mon Sep 17 00:00:00 2001 From: Matthias Kaehlcke Date: Fri, 21 Apr 2017 16:00:56 -0700 Subject: 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. Signed-off-by: Matthias Kaehlcke nc: I trimmed the original commit message since I'm not a part of CrOS and can't speak on their behalf. To fix these warnings, it requires a fairly intrusive backport of the sysreg conversion that Mark Rutland did in 4.9. I think disabling the warning is smarter, similar to commit d41d0fe374d4 ("turn off -Wattribute-alias") in this tree. Signed-off-by: Nathan Chancellor Signed-off-by: Greg Kroah-Hartman --- arch/arm64/Makefile | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index b6c90e5006e4..c10bb98144b0 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -56,6 +56,10 @@ 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" $$(( \ -- cgit v1.2.3