--- zzzz-none-000/linux-4.1.52/fs/notify/Makefile	2018-05-28 02:26:45.000000000 +0000
+++ bcm63-7530ax-731/linux-4.1.52/fs/notify/Makefile	2022-03-02 11:37:13.000000000 +0000
@@ -1,6 +1,8 @@
 obj-$(CONFIG_FSNOTIFY)		+= fsnotify.o notification.o group.o inode_mark.o \
 				   mark.o vfsmount_mark.o fdinfo.o
 
+CFLAGS_fsnotify.o += -I$(src)
+
 obj-y			+= dnotify/
 obj-y			+= inotify/
 obj-y			+= fanotify/