staging: luster: Fix format string mismatch in workitem.c

ws_nthreads is defined as unsigned int,
but it was specified as int.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/libcfs/workitem.c

@@ -389,11 +389,11 @@ cfs_wi_sched_create(char *name, struct cfs_cpt_table *cptab,
 		spin_unlock(&cfs_wi_data.wi_glock);
 
 		if (sched->ws_cptab != NULL && sched->ws_cpt >= 0) {
-			snprintf(name, sizeof(name), "%s_%02d_%02d",
+			snprintf(name, sizeof(name), "%s_%02d_%02u",
 				 sched->ws_name, sched->ws_cpt,
 				 sched->ws_nthreads);
 		} else {
-			snprintf(name, sizeof(name), "%s_%02d",
+			snprintf(name, sizeof(name), "%s_%02u",
 				 sched->ws_name, sched->ws_nthreads);
 		}