Move `struct io_br_sel` into io_uring_types.h and prepare for supporting
provided buffer on uring_cmd.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
 include/linux/io_uring_types.h | 19 +++++++++++++++++++
 io_uring/kbuf.h                | 18 ------------------
 2 files changed, 19 insertions(+), 18 deletions(-)

diff --git a/include/linux/io_uring_types.h b/include/linux/io_uring_types.h
index 1d33984611bc..9c6c548f43f5 100644
--- a/include/linux/io_uring_types.h
+++ b/include/linux/io_uring_types.h
@@ -85,6 +85,25 @@ struct io_mapped_region {
 	unsigned		flags;
 };
 
+/*
+ * Return value from io_buffer_list selection, to avoid stashing it in
+ * struct io_kiocb. For legacy/classic provided buffers, keeping a reference
+ * across execution contexts are fine. But for ring provided buffers, the
+ * list may go away as soon as ->uring_lock is dropped. As the io_kiocb
+ * persists, it's better to just keep the buffer local for those cases.
+ */
+struct io_br_sel {
+	struct io_buffer_list *buf_list;
+	/*
+	 * Some selection parts return the user address, others return an error.
+	 */
+	union {
+		void __user *addr;
+		ssize_t val;
+	};
+};
+
+
 /*
  * Arbitrary limit, can be raised if need be
  */
diff --git a/io_uring/kbuf.h b/io_uring/kbuf.h
index 32f73adbe1e9..ada382ff38d7 100644
--- a/io_uring/kbuf.h
+++ b/io_uring/kbuf.h
@@ -62,24 +62,6 @@ struct buf_sel_arg {
 	unsigned short partial_map;
 };
 
-/*
- * Return value from io_buffer_list selection, to avoid stashing it in
- * struct io_kiocb. For legacy/classic provided buffers, keeping a reference
- * across execution contexts are fine. But for ring provided buffers, the
- * list may go away as soon as ->uring_lock is dropped. As the io_kiocb
- * persists, it's better to just keep the buffer local for those cases.
- */
-struct io_br_sel {
-	struct io_buffer_list *buf_list;
-	/*
-	 * Some selection parts return the user address, others return an error.
-	 */
-	union {
-		void __user *addr;
-		ssize_t val;
-	};
-};
-
 struct io_br_sel io_buffer_select(struct io_kiocb *req, size_t *len,
 				  unsigned buf_group, unsigned int issue_flags);
 int io_buffers_select(struct io_kiocb *req, struct buf_sel_arg *arg,
-- 
2.47.0