arm64: Kconfig: select HAVE_FUTEX_CMPXCHG

arm64 provides always working implementation of futex_atomic_cmpxchg_inatomic(),
so there is no need to check it runtime.

Reported-by: Piyush swami <Piyush.swami@arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index e9b1fc22f72ef473a66d7167c827bd57c3bdccc6..6c27b81268170dd6a47d53bb5bcdba91fc482b81 100644 (file)
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -161,6 +161,7 @@ config ARM64
        select HAVE_PERF_USER_STACK_DUMP
        select HAVE_REGS_AND_STACK_ACCESS_API
        select HAVE_FUNCTION_ARG_ACCESS_API
+       select HAVE_FUTEX_CMPXCHG if FUTEX
        select HAVE_RCU_TABLE_FREE
        select HAVE_RSEQ
        select HAVE_STACKPROTECTOR