Add a memory barrier to ensure that stores become visible

in a proper order.

diff --git a/sys/arch/octeon/octeon/machdep.c b/sys/arch/octeon/octeon/machdep.c
index 98db386..cddcd12 100644 (file)
--- a/sys/arch/octeon/octeon/machdep.c
+++ b/sys/arch/octeon/octeon/machdep.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: machdep.c,v 1.88 2017/04/30 16:45:45 mpi Exp $ */
+/*     $OpenBSD: machdep.c,v 1.89 2017/06/11 03:03:05 visa Exp $ */
 
 /*
  * Copyright (c) 2009, 2010 Miodrag Vallat.
@@ -851,8 +851,11 @@ hw_cpu_boot_secondary(struct cpu_info *ci)
        if (kstack == 0)
                panic("unable to allocate idle stack\n");
        ci->ci_curprocpaddr = (void *)kstack;
+
        cpu_spinup_a0 = (uint64_t)ci;
        cpu_spinup_sp = (uint64_t)(kstack + USPACE);
+       mips_sync();
+
        cpu_spinup_mask = (uint32_t)ci->ci_cpuid;
 
        while (!cpuset_isset(&cpus_running, ci))