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driver core: Use the ktime_us_delta() helper

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Use the ktime_us_delta() helper to measure the driver probe time. Given the
helpers already returns an s64 value, let's drop the unnecessary casting to
s64 as well. There is no functional change.

Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Link: https://lore.kernel.org/r/20200803033343.1178-1-yuzenghui@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Zenghui Yu 2020-08-03 11:33:43 +08:00 committed by Greg Kroah-Hartman
parent 18efb2f9e8
commit e3aa745ff9
1 changed files with 2 additions and 3 deletions
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5
drivers/base/dd.c
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@ -658,15 +658,14 @@ done:
*/
static int really_probe_debug(struct device *dev, struct device_driver *drv)
{
ktime_t calltime, delta, rettime;
ktime_t calltime, rettime;
int ret;
calltime = ktime_get();
ret = really_probe(dev, drv);
rettime = ktime_get();
delta = ktime_sub(rettime, calltime);
pr_debug("probe of %s returned %d after %lld usecs\n",
dev_name(dev), ret, (s64) ktime_to_us(delta));
dev_name(dev), ret, ktime_us_delta(rettime, calltime));
return ret;
}