block: add kblockd_schedule_work_on()

Add a helper to schedule a regular struct work on a particular CPU.

Signed-off-by: Jens Axboe <axboe@fb.com>

block/blk-core.c

@@ -3097,6 +3097,12 @@ int kblockd_schedule_work(struct work_struct *work)
 }
 EXPORT_SYMBOL(kblockd_schedule_work);
 
+int kblockd_schedule_work_on(int cpu, struct work_struct *work)
+{
+	return queue_work_on(cpu, kblockd_workqueue, work);
+}
+EXPORT_SYMBOL(kblockd_schedule_work_on);
+
 int kblockd_schedule_delayed_work(struct delayed_work *dwork,
 				  unsigned long delay)
 {