Messages in this thread Patch in this message | | | From | Jakub Kicinski <> | Subject | [PATCH net-next 5/7] srcu: use a more appropriate lockdep helper | Date | Wed, 16 Sep 2020 11:45:26 -0700 |
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lockdep_is_held() is defined as:
#define lockdep_is_held(lock) lock_is_held(&(lock)->dep_map)
it hides away the dereference, so that builds with !LOCKDEP don't break. We should use it instead of using lock_is_held() directly.
This didn't use to be a problem, because RCU_LOCKDEP_WARN() cuts the condition out with the preprocessor if !LOCKDEP. This will soon change.
Signed-off-by: Jakub Kicinski <kuba@kernel.org> -- CC: jiangshanlai@gmail.com CC: paulmck@kernel.org CC: josh@joshtriplett.org CC: rostedt@goodmis.org CC: mathieu.desnoyers@efficios.com --- kernel/rcu/srcutree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/rcu/srcutree.c b/kernel/rcu/srcutree.c index c100acf332ed..8123ef15a159 100644 --- a/kernel/rcu/srcutree.c +++ b/kernel/rcu/srcutree.c @@ -919,7 +919,7 @@ static void __synchronize_srcu(struct srcu_struct *ssp, bool do_norm) { struct rcu_synchronize rcu; - RCU_LOCKDEP_WARN(lock_is_held(&ssp->dep_map) || + RCU_LOCKDEP_WARN(lockdep_is_held(ssp) || lock_is_held(&rcu_bh_lock_map) || lock_is_held(&rcu_lock_map) || lock_is_held(&rcu_sched_lock_map), -- 2.26.2
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