closures: Add a missing include

Fixes building in userspace.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/lib/closure.c b/lib/closure.c
index b38ded0..0855e69 100644 (file)
--- a/lib/closure.c
+++ b/lib/closure.c
@@ -9,6 +9,7 @@
 #include <linux/closure.h>
 #include <linux/debugfs.h>
 #include <linux/export.h>
+#include <linux/rcupdate.h>
 #include <linux/seq_file.h>
 #include <linux/sched/debug.h>