task_stack.h: add missing include

Kent Overstreet · Kent Overstreet · commit f6120d527b86 · 2023-12-20T19:26:30.000-05:00
Signed-off-by: Kent Overstreet &lt;kent.overstreet@linux.dev&gt;
diff --git a/include/linux/sched/task_stack.h b/include/linux/sched/task_stack.h
@@ -8,6 +8,7 @@
 
 #include <linux/sched.h>
 #include <linux/magic.h>
+#include <linux/refcount.h>
 
 #ifdef CONFIG_THREAD_INFO_IN_TASK
 
