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| author | Nick Desaulniers <ndesaulniers@google.com> | 2021-10-19 15:36:43 -0700 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-10-21 10:31:38 +0100 |
| commit | 1907d3ff5a644ad7c07bf3c0a56a0b1864c9e5cf (patch) | |
| tree | 6e65234f12251bb9e4adf7ebdc12ee4fc1cbdb70 /arch/arm64/include/asm | |
| parent | 5816b3e6577eaa676ceb00a848f0fd65fe2adc29 (diff) | |
| download | linux-1907d3ff5a644ad7c07bf3c0a56a0b1864c9e5cf.tar.bz2 | |
arm64: vdso32: drop the test for dmb ishld
Binutils added support for this instruction in commit
e797f7e0b2bedc9328d4a9a0ebc63ca7a2dbbebc which shipped in 2.24 (just
missing the 2.23 release) but was cherry-picked into 2.23 in commit
27a50d6755bae906bc73b4ec1a8b448467f0bea1. Thanks to Christian and Simon
for helping me with the patch archaeology.
According to Documentation/process/changes.rst, the minimum supported
version of binutils is 2.23. Since all supported versions of GAS support
this instruction, drop the assembler invocation, preprocessor
flags/guards, and the cross assembler macro that's now unused.
This also avoids a recursive self reference in a follow up cleanup
patch.
Cc: Christian Biesinger <cbiesinger@google.com>
Cc: Simon Marchi <simon.marchi@polymtl.ca>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20211019223646.1146945-2-ndesaulniers@google.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm')
| -rw-r--r-- | arch/arm64/include/asm/vdso/compat_barrier.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/vdso/compat_barrier.h b/arch/arm64/include/asm/vdso/compat_barrier.h index 3fd8fd6d8fc2..fb60a88b5ed4 100644 --- a/arch/arm64/include/asm/vdso/compat_barrier.h +++ b/arch/arm64/include/asm/vdso/compat_barrier.h @@ -20,7 +20,7 @@ #define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory") -#if __LINUX_ARM_ARCH__ >= 8 && defined(CONFIG_AS_DMB_ISHLD) +#if __LINUX_ARM_ARCH__ >= 8 #define aarch32_smp_mb() dmb(ish) #define aarch32_smp_rmb() dmb(ishld) #define aarch32_smp_wmb() dmb(ishst) |