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-rw-r--r--kernel/stop_machine.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index a467e6c28..4a1ca5f6d 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -21,6 +21,7 @@
#include <linux/smpboot.h>
#include <linux/atomic.h>
#include <linux/lglock.h>
+#include <linux/nmi.h>
/*
* Structure to determine completion condition and record errors. May
@@ -209,6 +210,13 @@ static int multi_cpu_stop(void *data)
break;
}
ack_state(msdata);
+ } else if (curstate > MULTI_STOP_PREPARE) {
+ /*
+ * At this stage all other CPUs we depend on must spin
+ * in the same loop. Any reason for hard-lockup should
+ * be detected and reported on their side.
+ */
+ touch_nmi_watchdog();
}
} while (curstate != MULTI_STOP_EXIT);