1 files changed, 6 insertions, 1 deletions

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index e012b9be777e..14977d0470d1 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -1671,6 +1671,7 @@ static void print_cpu_stall_info_begin(void)
  */
 static void print_cpu_stall_info(struct rcu_state *rsp, int cpu)
 {
+        unsigned long delta;
         char fast_no_hz[72];
         struct rcu_data *rdp = per_cpu_ptr(rsp->rda, cpu);
         struct rcu_dynticks *rdtp = rdp->dynticks;
@@ -1685,11 +1686,15 @@ static void print_cpu_stall_info(struct rcu_state *rsp, int cpu)
                 ticks_value = rsp->gpnum - rdp->gpnum;
         }
         print_cpu_stall_fast_no_hz(fast_no_hz, cpu);
-        pr_err("\t%d-%c%c%c: (%lu %s) idle=%03x/%llx/%d softirq=%u/%u fqs=%ld %s\n",
+        delta = rdp->mynode->gpnum - rdp->rcu_iw_gpnum;
+        pr_err("\t%d-%c%c%c%c: (%lu %s) idle=%03x/%llx/%d softirq=%u/%u fqs=%ld %s\n",
                cpu,
                "O."[!!cpu_online(cpu)],
                "o."[!!(rdp->grpmask & rdp->mynode->qsmaskinit)],
                "N."[!!(rdp->grpmask & rdp->mynode->qsmaskinitnext)],
+               !IS_ENABLED(CONFIG_IRQ_WORK) ? '?' :
+                        rdp->rcu_iw_pending ? (int)min(delta, 9UL) + '0' :
+                                "!."[!delta],
                ticks_value, ticks_title,
                rcu_dynticks_snap(rdtp) & 0xfff,
                rdtp->dynticks_nesting, rdtp->dynticks_nmi_nesting,