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authorSteven Whitehouse <swhiteho@redhat.com>2013-02-14 19:42:34 -0500
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2013-03-12 17:07:41 -0400
commit49d0de082c31de34cc896c14eec5f1c2ade0415a (patch)
tree29a1b907aa45ef5c158fbba3a820067a9b8e568e /include/linux/list_bl.h
parent6f0a6ad2b55053879eee89f812f3527950c380d6 (diff)
rcu: Fix hlist_bl_set_first_rcu() annotation
Abhi noticed that we were getting a complaint from the RCU subsystem about access of an RCU protected list under the write side bit lock. This commit adds additional annotation to check both the RCU read lock and the write side bit lock before printing a message. Reported by: Abhijith Das <adas@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Tested-by: Abhijith Das <adas@redhat.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'include/linux/list_bl.h')
-rw-r--r--include/linux/list_bl.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/list_bl.h b/include/linux/list_bl.h
index 31f9d75adc5b..2eb88556c5c5 100644
--- a/include/linux/list_bl.h
+++ b/include/linux/list_bl.h
@@ -125,6 +125,11 @@ static inline void hlist_bl_unlock(struct hlist_bl_head *b)
125 __bit_spin_unlock(0, (unsigned long *)b); 125 __bit_spin_unlock(0, (unsigned long *)b);
126} 126}
127 127
128static inline bool hlist_bl_is_locked(struct hlist_bl_head *b)
129{
130 return bit_spin_is_locked(0, (unsigned long *)b);
131}
132
128/** 133/**
129 * hlist_bl_for_each_entry - iterate over list of given type 134 * hlist_bl_for_each_entry - iterate over list of given type
130 * @tpos: the type * to use as a loop cursor. 135 * @tpos: the type * to use as a loop cursor.