bootmem: remove not implemented function call, bootmem_arch_preferred_node()

[platform/adaptation/renesas_rcar/renesas_kernel.git] / kernel / rcupdate.c

diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index 4e6a61b..a2cf761 100644 (file)
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -45,12 +45,16 @@
 #include <linux/mutex.h>
 #include <linux/export.h>
 #include <linux/hardirq.h>
+#include <linux/delay.h>
+#include <linux/module.h>
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/rcu.h>
 
 #include "rcu.h"
 
+module_param(rcu_expedited, int, 0);
+
 #ifdef CONFIG_PREEMPT_RCU
 
 /*
@@ -81,6 +85,9 @@ void __rcu_read_unlock(void)
        } else {
                barrier();  /* critical section before exit code. */
                t->rcu_read_lock_nesting = INT_MIN;
+#ifdef CONFIG_PROVE_RCU_DELAY
+               udelay(10); /* Make preemption more probable. */
+#endif /* #ifdef CONFIG_PROVE_RCU_DELAY */
                barrier();  /* assign before ->rcu_read_unlock_special load */
                if (unlikely(ACCESS_ONCE(t->rcu_read_unlock_special)))
                        rcu_read_unlock_special(t);