From aed807c8e2bf009b2c6a35490d4fd4383887221d Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Tue, 18 Aug 2015 06:43:15 -0700
Subject: tcg: synchronize exit_request and tcg_current_cpu accesses

Synchronize the remaining pair of accesses in cpu_signal.  These should
be necessary on Windows as well, at least in theory.  Probably
SuspendProcess and ResumeProcess introduce some implicit memory
barrier.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 cpu-exec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'cpu-exec.c')

diff --git a/cpu-exec.c b/cpu-exec.c
index e24c640013..ef9d74552e 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -372,7 +372,7 @@ int cpu_exec(CPUState *cpu)
     atomic_mb_set(&tcg_current_cpu, cpu);
     rcu_read_lock();
 
-    if (unlikely(exit_request)) {
+    if (unlikely(atomic_mb_read(&exit_request))) {
         cpu->exit_request = 1;
     }
 
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