v4.19.13 snapshot.
diff --git a/include/linux/bsg.h b/include/linux/bsg.h
new file mode 100644
index 0000000..dac37b6
--- /dev/null
+++ b/include/linux/bsg.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_BSG_H
+#define _LINUX_BSG_H
+
+#include <uapi/linux/bsg.h>
+
+struct request;
+
+#ifdef CONFIG_BLK_DEV_BSG
+struct bsg_ops {
+ int (*check_proto)(struct sg_io_v4 *hdr);
+ int (*fill_hdr)(struct request *rq, struct sg_io_v4 *hdr,
+ fmode_t mode);
+ int (*complete_rq)(struct request *rq, struct sg_io_v4 *hdr);
+ void (*free_rq)(struct request *rq);
+};
+
+struct bsg_class_device {
+ struct device *class_dev;
+ int minor;
+ struct request_queue *queue;
+ const struct bsg_ops *ops;
+};
+
+int bsg_register_queue(struct request_queue *q, struct device *parent,
+ const char *name, const struct bsg_ops *ops);
+int bsg_scsi_register_queue(struct request_queue *q, struct device *parent);
+void bsg_unregister_queue(struct request_queue *q);
+#else
+static inline int bsg_scsi_register_queue(struct request_queue *q,
+ struct device *parent)
+{
+ return 0;
+}
+static inline void bsg_unregister_queue(struct request_queue *q)
+{
+}
+#endif /* CONFIG_BLK_DEV_BSG */
+#endif /* _LINUX_BSG_H */