arm64: Kconfig: select HAVE_FUTEX_CMPXCHG

murzinv · willdeacon · commit 983460233659 · 2020-01-21T09:14:01.000Z
arm64 provides always working implementation of futex_atomic_cmpxchg_inatomic(),
so there is no need to check it runtime.

Reported-by: Piyush swami &lt;Piyush.swami@arm.com&gt;
Signed-off-by: Vladimir Murzin &lt;vladimir.murzin@arm.com&gt;
Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
diff --git 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
