LU-4423 obd: use ktime_t for calculating elapsed time

process_param2_config() tries to print how much time has passed
across a call_usermodehelper() function, and uses struct timeval
for that.

We want to remove this structure, so this is better expressed
in terms of ktime_t and ktime_us_delta().

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Change-Id: I90c61d9d49ee0d500772f1b370790e37859f18b2
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: https://review.whamcloud.com/23146
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>

diff --git a/lustre/obdclass/obd_config.c b/lustre/obdclass/obd_config.c
index 3d43727..34c5711 100644 (file)
--- a/lustre/obdclass/obd_config.c
+++ b/lustre/obdclass/obd_config.c
@@ -1096,8 +1096,8 @@ static int process_param2_config(struct lustre_cfg *lcfg)
                [2] = param,
                [3] = NULL
        };
-       struct timeval  start;
-       struct timeval  end;
+       ktime_t start;
+       ktime_t end;
        int             rc;
        ENTRY;
 
@@ -1107,18 +1107,18 @@ static int process_param2_config(struct lustre_cfg *lcfg)
                RETURN(-EINVAL);
        }
 
-       do_gettimeofday(&start);
+       start = ktime_get();
        rc = call_usermodehelper(argv[0], argv, NULL, UMH_WAIT_PROC);
-       do_gettimeofday(&end);
+       end = ktime_get();
 
        if (rc < 0) {
                CERROR("lctl: error invoking upcall %s %s %s: rc = %d; "
                       "time %ldus\n", argv[0], argv[1], argv[2], rc,
-                      cfs_timeval_sub(&end, &start, NULL));
+                      (long)ktime_us_delta(end, start));
        } else {
                CDEBUG(D_HA, "lctl: invoked upcall %s %s %s, time %ldus\n",
                       argv[0], argv[1], argv[2],
-                      cfs_timeval_sub(&end, &start, NULL));
+                      (long)ktime_us_delta(end, start));
                       rc = 0;
        }