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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2011-03-29 12:56:56 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2011-05-05 23:16:57 -0700
commitb0c9d7ff2793502650ad987c3f237d5fe5587a1e (patch)
tree04a19658925baa1eda66bad18d8a2ebd061ddac5 /include/linux/rcupdate.h
parentfc2ecf7ec76c5ee150b83dcefc863fa03fd365fb (diff)
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 <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'include/linux/rcupdate.h')
-rw-r--r--include/linux/rcupdate.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 9e169c2ba91f..c7aeacf7fc98 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,