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CHROMIUM: arm64: Disable asm-operand-width warning for clang

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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: Ia331bc83d44b8c1499450aefb45c576cd29ebf55
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Greg Hackmann <ghackmann@google.com>
This commit is contained in:
Matthias Kaehlcke
2017-04-21 16:00:56 -07:00
committed by Greg Hackmann
parent 2376d9b464
commit e9186826bb
1 changed files with 4 additions and 0 deletions
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4
arch/arm64/Makefile
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@@ -66,6 +66,10 @@ 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" $$(( \