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| author | Tri Vo <trong@android.com> | 2018-09-19 12:27:50 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-13 11:15:12 -0800 |
| commit | ad2c712b50597ab70cdf9c75101518a6837d0e69 (patch) | |
| tree | 775234036bdbfe9e1b1c9ce17f55190945555548 | |
| parent | baf1746da59e310f8e7d016090e2d447e867828a (diff) | |
| download | linux-stable-ad2c712b50597ab70cdf9c75101518a6837d0e69.tar.gz linux-stable-ad2c712b50597ab70cdf9c75101518a6837d0e69.tar.bz2 linux-stable-ad2c712b50597ab70cdf9c75101518a6837d0e69.zip | |
arm64: lse: remove -fcall-used-x0 flag
commit 2a6c7c367de82951c98a290a21156770f6f82c84 upstream.
x0 is not callee-saved in the PCS. So there is no need to specify
-fcall-used-x0.
Clang doesn't currently support -fcall-used flags. This patch will help
building the kernel with clang.
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Tri Vo <trong@android.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/arm64/lib/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/lib/Makefile b/arch/arm64/lib/Makefile index 9a8cb96555d6..9a947afaf74c 100644 --- a/arch/arm64/lib/Makefile +++ b/arch/arm64/lib/Makefile @@ -12,7 +12,7 @@ lib-y := bitops.o clear_user.o delay.o copy_from_user.o \ # when supported by the CPU. Result and argument registers are handled # correctly, based on the function prototype. lib-$(CONFIG_ARM64_LSE_ATOMICS) += atomic_ll_sc.o -CFLAGS_atomic_ll_sc.o := -fcall-used-x0 -ffixed-x1 -ffixed-x2 \ +CFLAGS_atomic_ll_sc.o := -ffixed-x1 -ffixed-x2 \ -ffixed-x3 -ffixed-x4 -ffixed-x5 -ffixed-x6 \ -ffixed-x7 -fcall-saved-x8 -fcall-saved-x9 \ -fcall-saved-x10 -fcall-saved-x11 -fcall-saved-x12 \ |