From b0c9d7ff2793502650ad987c3f237d5fe5587a1e Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Tue, 29 Mar 2011 12:56:56 -0700 Subject: [PATCH] rcu: add DEBUG_OBJECTS_RCU_HEAD check for alignment Verify that rcu_head structures are aligned to a four-byte boundary. This check is enabled by CONFIG_DEBUG_OBJECTS_RCU_HEAD. Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett --- include/linux/rcupdate.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index 9e169c2ba91..c7aeacf7fc9 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -785,6 +785,7 @@ extern struct debug_obj_descr rcuhead_debug_descr; static inline void debug_rcu_head_queue(struct rcu_head *head) { + WARN_ON_ONCE((unsigned long)head & 0x3); debug_object_activate(head, &rcuhead_debug_descr); debug_object_active_state(head, &rcuhead_debug_descr, STATE_RCU_HEAD_READY, -- 2.20.1