[PATCH v2 2/4] arm64: vdso32: drop test for -march=armv8-a
From: Nick Desaulniers <ndesaulniers@google.com>
Date: 2021-10-19 22:37:15
Also in:
lkml, llvm
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
As Arnd points out: gcc-4.8 already supported -march=armv8, and we require gcc-5.1 now, so both this #if/#else construct and the corresponding "cc32-option,-march=armv8-a" check should be obsolete now. Link: https://lore.kernel.org/lkml/CAK8P3a3UBEJ0Py2ycz=rHfgog8g3mCOeQOwO0Gmp-iz6Uxkapg@mail.gmail.com/ (local) Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> --- arch/arm64/include/asm/vdso/compat_barrier.h | 7 ------- arch/arm64/kernel/vdso32/Makefile | 8 +------- 2 files changed, 1 insertion(+), 14 deletions(-)
diff --git a/arch/arm64/include/asm/vdso/compat_barrier.h b/arch/arm64/include/asm/vdso/compat_barrier.h
index fb60a88b5ed4..3ac35f4a667c 100644
--- a/arch/arm64/include/asm/vdso/compat_barrier.h
+++ b/arch/arm64/include/asm/vdso/compat_barrier.h@@ -20,16 +20,9 @@ #define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory") -#if __LINUX_ARM_ARCH__ >= 8 #define aarch32_smp_mb() dmb(ish) #define aarch32_smp_rmb() dmb(ishld) #define aarch32_smp_wmb() dmb(ishst) -#else -#define aarch32_smp_mb() dmb(ish) -#define aarch32_smp_rmb() aarch32_smp_mb() -#define aarch32_smp_wmb() dmb(ishst) -#endif - #undef smp_mb #undef smp_rmb
diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
index 89299a26638b..1407516e041e 100644
--- a/arch/arm64/kernel/vdso32/Makefile
+++ b/arch/arm64/kernel/vdso32/Makefile@@ -65,13 +65,7 @@ endif # From arm vDSO Makefile VDSO_CAFLAGS += -fPIC -fno-builtin -fno-stack-protector VDSO_CAFLAGS += -DDISABLE_BRANCH_PROFILING - - -# Try to compile for ARMv8. If the compiler is too old and doesn't support it, -# fall back to v7. There is no easy way to check for what architecture the code -# is being compiled, so define a macro specifying that (see arch/arm/Makefile). -VDSO_CAFLAGS += $(call cc32-option,-march=armv8-a -D__LINUX_ARM_ARCH__=8,\ - -march=armv7-a -D__LINUX_ARM_ARCH__=7) +VDSO_CAFLAGS += -march=armv8-a VDSO_CFLAGS := $(VDSO_CAFLAGS) VDSO_CFLAGS += -DENABLE_COMPAT_VDSO=1
--
2.33.0.1079.g6e70778dc9-goog
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