diff -drupN a/include/linux/file.h b/include/linux/file.h
--- a/include/linux/file.h	2018-08-06 17:23:04.000000000 +0300
+++ b/include/linux/file.h	2022-06-12 05:28:14.000000000 +0300
@@ -85,5 +85,6 @@ extern void fd_install(unsigned int fd,
 
 extern void flush_delayed_fput(void);
 extern void __fput_sync(struct file *);
+int get_unused_fd_flags2(unsigned flags);
 
 #endif /* __LINUX_FILE_H */