An interface may need to assert a lock invariant and not flood the
system logs; add a lockdep helper macro equivalent to
lockdep_assert_held() which only WARNs once.
cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Signed-off-by: Peter Hurley <pe...@hurleysoftware.com>
---
include/linux/lockdep.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 008388f9..64c7425 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -362,6 +362,10 @@ extern void lockdep_trace_alloc(gfp_t mask);
WARN_ON(debug_locks && !lockdep_is_held(l)); \
} while (0)
+#define lockdep_assert_held_once(l) do { \
+ WARN_ON_ONCE(debug_locks && !lockdep_is_held(l)); \
+ } while (0)
+
#define lockdep_recursing(tsk) ((tsk)->lockdep_recursion)
#else /* !CONFIG_LOCKDEP */
@@ -412,6 +416,7 @@ struct lock_class_key { };
#define lockdep_depth(tsk) (0)
#define lockdep_assert_held(l) do { (void)(l); } while (0)
+#define lockdep_assert_held_once(l) do { (void)(l); } while (0)
#define lockdep_recursing(tsk) (0)
--
2.1.0
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