1 files changed, 19 insertions, 0 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
@@ -86,6 +86,25 @@ struct io_mapped_region {
 };
 
 /*
+ * 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
  */
 #define IO_RINGFD_REG_MAX 16