From da99423e4cc4d178a92442048411ef5ebf02ac06 Mon Sep 17 00:00:00 2001 From: Taylor R Campbell Date: Thu, 31 Mar 2022 02:44:04 +0000 Subject: [PATCH 43/49] futex(9): Convert membar_enter/exit to membar_acquire/release. No functional change -- this is just in an illustrative comment! --- sys/kern/sys_futex.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sys/kern/sys_futex.c b/sys/kern/sys_futex.c index 00f352a13bda..fed462d80ba0 100644 --- a/sys/kern/sys_futex.c +++ b/sys/kern/sys_futex.c @@ -63,13 +63,13 @@ __KERNEL_RCSID(0, "$NetBSD: sys_futex.c,v 1.16 2022/03/12 15:32:32 riastradh Exp * continue; * } * } while (atomic_cas_uint(&lock, v, v & ~1) != v); - * membar_enter(); + * membar_acquire(); * * ... * * // Release the lock. Optimistically assume there are * // no waiters first until demonstrated otherwise. - * membar_exit(); + * membar_release(); * if (atomic_cas_uint(&lock, 1, 0) != 1) { * // There may be waiters. * v = atomic_swap_uint(&lock, 0);