Merge 4.14-rc4 into staging-next

We want the staging/iio fixes in here as well to handle merge issues.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 1250e4bd4b85..b0ad62b0e7b8 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -882,6 +882,11 @@ void rcu_irq_exit(void)
 
         RCU_LOCKDEP_WARN(!irqs_disabled(), "rcu_irq_exit() invoked with irqs enabled!!!");
         rdtp = this_cpu_ptr(&rcu_dynticks);
+
+        /* Page faults can happen in NMI handlers, so check... */
+        if (rdtp->dynticks_nmi_nesting)
+                return;
+
         WARN_ON_ONCE(IS_ENABLED(CONFIG_RCU_EQS_DEBUG) &&
                      rdtp->dynticks_nesting < 1);
         if (rdtp->dynticks_nesting <= 1) {
@@ -1015,6 +1020,11 @@ void rcu_irq_enter(void)
 
         RCU_LOCKDEP_WARN(!irqs_disabled(), "rcu_irq_enter() invoked with irqs enabled!!!");
         rdtp = this_cpu_ptr(&rcu_dynticks);
+
+        /* Page faults can happen in NMI handlers, so check... */
+        if (rdtp->dynticks_nmi_nesting)
+                return;
+
         oldval = rdtp->dynticks_nesting;
         rdtp->dynticks_nesting++;
         WARN_ON_ONCE(IS_ENABLED(CONFIG_RCU_EQS_DEBUG) &&