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yaml --- r: 225877 b: refs/heads/master c: 28e1829 h: refs/heads/master i: 225875: 6a826e1 v: v3
git-mirror · Dec 20, 2010 · 6c9c4f2 · 6c9c4f2
1 parent b3e7aab
commit 6c9c4f2
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Showing 2 changed files with 16 additions and 4 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0eb0511d176534674600a1986c3c766756288908
+refs/heads/master: 28e18293cf0f8d23a0950d7b1d2212d11af494dc
diff --git a/trunk/arch/arm/kernel/smp.c b/trunk/arch/arm/kernel/smp.c
@@ -575,10 +575,22 @@ void smp_send_reschedule(int cpu)
 
 void smp_send_stop(void)
 {
-	cpumask_t mask = cpu_online_map;
-	cpu_clear(smp_processor_id(), mask);
-	if (!cpus_empty(mask))
+	unsigned long timeout;
+
+	if (num_online_cpus() > 1) {
+		cpumask_t mask = cpu_online_map;
+		cpu_clear(smp_processor_id(), mask);
+
 		smp_cross_call(&mask, IPI_CPU_STOP);
+	}
+
+	/* Wait up to one second for other CPUs to stop */
+	timeout = USEC_PER_SEC;
+	while (num_online_cpus() > 1 && timeout--)
+		udelay(1);
+
+	if (num_online_cpus() > 1)
+		pr_warning("SMP: failed to stop secondary CPUs\n");
 }
 
 /*