added flush() call
diff --git a/include/linux/fuse.h b/include/linux/fuse.h
index 63cf167..027cb5e 100644
--- a/include/linux/fuse.h
+++ b/include/linux/fuse.h
@@ -82,6 +82,7 @@
 	FUSE_GETXATTR      = 22,
 	FUSE_LISTXATTR     = 23,
 	FUSE_REMOVEXATTR   = 24,
+	FUSE_FLUSH         = 25,
 };
 
 /* Conservative buffer size for the client */