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| author | Matthias Kaehlcke <mka@chromium.org> | 2017-04-22 02:00:56 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-27 18:07:59 +0300 |
| commit | 2b92e27f26f136b9c16a0ccb94a89ff599814675 (patch) | |
| tree | c30403759f915eebdb57954948698326ce19572a | |
| parent | c695cffc9f7cac218249dce3c79c030e56b88170 (diff) | |
| download | linux-2b92e27f26f136b9c16a0ccb94a89ff599814675.tar.xz | |
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 <mka@chromium.org>
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 <natechancellor@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/arm64/Makefile | 4 |
1 files changed, 4 insertions, 0 deletions
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" $$(( \ |