move a few externs to smbdirect.h to eliminate warning

Quiet minor sparse warnings in new SMB3 rdma patch series
("symbol was not declared ...") by moving these externs to smbdirect.h
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>

fs/cifs/cifs_debug.c

@@ -483,15 +483,6 @@ static const struct file_operations cifs_##name##_proc_fops = { \
 	.write		= name##_write, \
 }
 
-extern int rdma_readwrite_threshold;
-extern int smbd_max_frmr_depth;
-extern int smbd_keep_alive_interval;
-extern int smbd_max_receive_size;
-extern int smbd_max_fragmented_recv_size;
-extern int smbd_max_send_size;
-extern int smbd_send_credit_target;
-extern int smbd_receive_credit_max;
-
 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 PROC_FILE_DEFINE(smbd_keep_alive_interval);

fs/cifs/smbdirect.h

@@ -24,6 +24,15 @@
 #include <rdma/rdma_cm.h>
 #include <linux/mempool.h>
 
+extern int rdma_readwrite_threshold;
+extern int smbd_max_frmr_depth;
+extern int smbd_keep_alive_interval;
+extern int smbd_max_receive_size;
+extern int smbd_max_fragmented_recv_size;
+extern int smbd_max_send_size;
+extern int smbd_send_credit_target;
+extern int smbd_receive_credit_max;
+
 enum keep_alive_status {
 	KEEP_ALIVE_NONE,
 	KEEP_ALIVE_PENDING,