diff --git a/tools/build/checkstyle9.pl b/tools/build/checkstyle9.pl
--- a/tools/build/checkstyle9.pl
+++ b/tools/build/checkstyle9.pl
@@ -208,6 +208,7 @@
 			QEMU_SENTINEL|
 			QEMU_PACKED|
 			GCC_FMT_ATTR
+                        __restrict|
 		  }x;
 our $Modifier;
 our $Inline	= qr{inline};