X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=kernel%2Fsmp.c;h=8eb18ff6c523e6aefc17a626d497fa7205deab41;hb=d5229e8d7df9e95ecfe220f1c0091a0fd65c658b;hp=07854477c16447ff87df874b4f117bcafadd4f33;hpb=1fc149933fd49a5b0e7738dc0853dbfbac4ae0e1;p=platform%2Fkernel%2Flinux-exynos.git

diff --git a/kernel/smp.c b/kernel/smp.c
index 0785447..8eb18ff 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -14,6 +14,8 @@
 #include <linux/smp.h>
 #include <linux/cpu.h>
 #include <linux/sched.h>
+#define CREATE_TRACE_POINTS
+#include <trace/events/smp.h>
 
 #include "smpboot.h"
 
@@ -153,7 +155,9 @@ static int generic_exec_single(int cpu, struct call_single_data *csd,
 		 */
 		csd_unlock(csd);
 		local_irq_save(flags);
+		trace_smp_call_func_entry(func);
 		func(info);
+		trace_smp_call_func_exit(func);
 		local_irq_restore(flags);
 		return 0;
 	}
@@ -178,8 +182,10 @@ static int generic_exec_single(int cpu, struct call_single_data *csd,
 	 * locking and barrier primitives. Generic code isn't really
 	 * equipped to do the right thing...
 	 */
-	if (llist_add(&csd->llist, &per_cpu(call_single_queue, cpu)))
+	if (llist_add(&csd->llist, &per_cpu(call_single_queue, cpu))) {
+		trace_smp_call_func_send(csd->func, cpu);
 		arch_send_call_function_single_ipi(cpu);
+	}
 
 	return 0;
 }
@@ -240,14 +246,17 @@ static void flush_smp_call_function_queue(bool warn_cpu_offline)
 	llist_for_each_entry_safe(csd, csd_next, entry, llist) {
 		smp_call_func_t func = csd->func;
 		void *info = csd->info;
-
 		/* Do we wait until *after* callback? */
 		if (csd->flags & CSD_FLAG_SYNCHRONOUS) {
+			trace_smp_call_func_entry(func);
 			func(info);
+			trace_smp_call_func_exit(func);
 			csd_unlock(csd);
 		} else {
 			csd_unlock(csd);
+			trace_smp_call_func_entry(func);
 			func(info);
+			trace_smp_call_func_exit(func);
 		}
 	}
 
@@ -276,6 +285,7 @@ int smp_call_function_single(int cpu, smp_call_func_t func, void *info,
 	int this_cpu;
 	int err;
 
+	trace_smp_call_func_send(func, cpu);
 	/*
 	 * prevent preemption and reschedule on another processor,
 	 * as well as CPU removal