PM: sleep: Use ktime_us_delta() in initcall_debug_report()

Use ktime_us_delta() to make the debug log more precise instead of
shifting the return value of ktime_to_ns() applied to a ktime_sub()
result by 10 bit positions to the right.

Signed-off-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
[ rjw: Changelog rewrite, subject edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index f893c3c..d568772 100644 (file)
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -220,16 +220,13 @@ static void initcall_debug_report(struct device *dev, ktime_t calltime,
                                  void *cb, int error)
 {
        ktime_t rettime;
-       s64 nsecs;
 
        if (!pm_print_times_enabled)
                return;
 
        rettime = ktime_get();
-       nsecs = (s64) ktime_to_ns(ktime_sub(rettime, calltime));
-
        dev_info(dev, "%pS returned %d after %Ld usecs\n", cb, error,
-                (unsigned long long)nsecs >> 10);
+                (unsigned long long)ktime_us_delta(rettime, calltime));
 }
 
 /**