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-rw-r--r--drivers/base/power/main.c31
-rw-r--r--include/linux/init.h2
2 files changed, 33 insertions, 0 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 8aa2443182d..30f0ceebd36 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -25,6 +25,7 @@
#include <linux/resume-trace.h>
#include <linux/rwsem.h>
#include <linux/interrupt.h>
+#include <linux/sched.h>
#include "../base.h"
#include "power.h"
@@ -172,6 +173,13 @@ static int pm_op(struct device *dev,
pm_message_t state)
{
int error = 0;
+ ktime_t calltime, delta, rettime;
+
+ if (initcall_debug) {
+ pr_info("calling %s+ @ %i\n",
+ dev_name(dev), task_pid_nr(current));
+ calltime = ktime_get();
+ }
switch (state.event) {
#ifdef CONFIG_SUSPEND
@@ -219,6 +227,14 @@ static int pm_op(struct device *dev,
default:
error = -EINVAL;
}
+
+ if (initcall_debug) {
+ rettime = ktime_get();
+ delta = ktime_sub(rettime, calltime);
+ pr_info("call %s+ returned %d after %Ld usecs\n", dev_name(dev),
+ error, (unsigned long long)ktime_to_ns(delta) >> 10);
+ }
+
return error;
}
@@ -236,6 +252,13 @@ static int pm_noirq_op(struct device *dev,
pm_message_t state)
{
int error = 0;
+ ktime_t calltime, delta, rettime;
+
+ if (initcall_debug) {
+ pr_info("calling %s_i+ @ %i\n",
+ dev_name(dev), task_pid_nr(current));
+ calltime = ktime_get();
+ }
switch (state.event) {
#ifdef CONFIG_SUSPEND
@@ -283,6 +306,14 @@ static int pm_noirq_op(struct device *dev,
default:
error = -EINVAL;
}
+
+ if (initcall_debug) {
+ rettime = ktime_get();
+ delta = ktime_sub(rettime, calltime);
+ printk("initcall %s_i+ returned %d after %Ld usecs\n", dev_name(dev),
+ error, (unsigned long long)ktime_to_ns(delta) >> 10);
+ }
+
return error;
}
diff --git a/include/linux/init.h b/include/linux/init.h
index ff8bde520d0..ab1d31f9352 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -149,6 +149,8 @@ void prepare_namespace(void);
extern void (*late_time_init)(void);
+extern int initcall_debug;
+
#endif
#ifndef MODULE