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arm64: compat: No need for pre-ARMv7 barriers on an ARMv8 system

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Remove the deprecated (pre-ARMv7) compat barriers as they would not be used
on an ARMv8 system.

Fixes: a7f71a2c89 ("arm64: compat: Add vDSO")
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Cc: Shijith Thotton <sthotton@marvell.com>
Cc: Andre Przywara <andre.przywara@arm.com>
Link: https://lkml.kernel.org/r/20190624140018.GD29120@arrakis.emea.arm.com
This commit is contained in:
Catalin Marinas 2019-06-24 15:00:19 +01:00 committed by Thomas Gleixner
parent 94fee4d437
commit 6a5b78b32d
1 changed files with 0 additions and 7 deletions
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7
arch/arm64/include/asm/vdso/compat_barrier.h
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@ -18,14 +18,7 @@
#undef dmb
#endif
#if __LINUX_ARM_ARCH__ >= 7
#define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory")
#elif __LINUX_ARM_ARCH__ == 6
#define dmb(x) __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" \
: : "r" (0) : "memory")
#else
#define dmb(x) __asm__ __volatile__ ("" : : : "memory")
#endif
#if __LINUX_ARM_ARCH__ >= 8
#define aarch32_smp_mb() dmb(ish)