scsi-tgt: BKL pushdown

Signed-off-by: Arnd Bergmann <[e-mail]>

drivers/scsi/scsi_tgt_if.c

···
  */
 #include <linux/miscdevice.h>
 #include <linux/file.h>
+#include <linux/smp_lock.h>
 #include <net/tcp.h>
 #include <scsi/scsi.h>
 #include <scsi/scsi_cmnd.h>
···
 {
 	tx_ring.tr_idx = rx_ring.tr_idx = 0;
 
+	cycle_kernel_lock();
 	return 0;
 }