diff -Naur hybrid-v35_64-nodebug-pcoem-6_30_223_271.orig/src/wl/sys/wl_linux.c hybrid-v35_64-nodebug-pcoem-6_30_223_271/src/wl/sys/wl_linux.c
--- hybrid-v35_64-nodebug-pcoem-6_30_223_271.orig/src/wl/sys/wl_linux.c	2020-03-19 10:24:18.154395810 +0100
+++ hybrid-v35_64-nodebug-pcoem-6_30_223_271/src/wl/sys/wl_linux.c	2020-11-11 13:39:00.579562572 +0100
@@ -1659,7 +1659,11 @@
 		goto done2;
 	}
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 9, 0)
+	if (uaccess_kernel())
+#else
 	if (segment_eq(get_fs(), KERNEL_DS))
+#endif
 		buf = ioc.buf;
 
 	else if (ioc.buf) {