X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=kernel%2Fcontext_tracking.c;h=72d59a1a6eb66f54985aa8711e0d55ed46150628;hb=923936157b158f36bd6a3d86496dce82b1a957de;hp=17715d811b71c147b619d2de7d0ab3a3595a2712;hpb=3aab4f50bff89bdea5066a05d4f3c5fa25bc37c7;p=firefly-linux-kernel-4.4.55.git

diff --git a/kernel/context_tracking.c b/kernel/context_tracking.c
index 17715d811b71..72d59a1a6eb6 100644
--- a/kernel/context_tracking.c
+++ b/kernel/context_tracking.c
@@ -77,7 +77,6 @@ void context_tracking_enter(enum ctx_state state)
 	local_irq_save(flags);
 	if ( __this_cpu_read(context_tracking.state) != state) {
 		if (__this_cpu_read(context_tracking.active)) {
-			trace_user_enter(0);
 			/*
 			 * At this stage, only low level arch entry code remains and
 			 * then we'll run in userspace. We can assume there won't be
@@ -85,7 +84,10 @@ void context_tracking_enter(enum ctx_state state)
 			 * user_exit() or rcu_irq_enter(). Let's remove RCU's dependency
 			 * on the tick.
 			 */
-			vtime_user_enter(current);
+			if (state == CONTEXT_USER) {
+				trace_user_enter(0);
+				vtime_user_enter(current);
+			}
 			rcu_user_enter();
 		}
 		/*
@@ -106,6 +108,7 @@ void context_tracking_enter(enum ctx_state state)
 	local_irq_restore(flags);
 }
 NOKPROBE_SYMBOL(context_tracking_enter);
+EXPORT_SYMBOL_GPL(context_tracking_enter);
 
 void context_tracking_user_enter(void)
 {
@@ -143,14 +146,17 @@ void context_tracking_exit(enum ctx_state state)
 			 * RCU core about that (ie: we may need the tick again).
 			 */
 			rcu_user_exit();
-			vtime_user_exit(current);
-			trace_user_exit(0);
+			if (state == CONTEXT_USER) {
+				vtime_user_exit(current);
+				trace_user_exit(0);
+			}
 		}
 		__this_cpu_write(context_tracking.state, CONTEXT_KERNEL);
 	}
 	local_irq_restore(flags);
 }
 NOKPROBE_SYMBOL(context_tracking_exit);
+EXPORT_SYMBOL_GPL(context_tracking_exit);
 
 void context_tracking_user_exit(void)
 {