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authorPaul E. McKenney <paul.mckenney@linaro.org>2011-06-21 00:13:44 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2011-09-28 21:38:14 -0700
commite99033c5c160f1f247c665923a66acec693a967c (patch)
treec5b0863ad4b673134070872a159055237186f0fe /kernel/rcu.h
parent300df91ca9358f7f09298eec9503c12b32054ef7 (diff)
downloadlinux-e99033c5c160f1f247c665923a66acec693a967c.tar.bz2
rcu: Put names into TINY_RCU structures under RCU_TRACE
In order to allow event tracing to distinguish between flavors of RCU, we need those names in the relevant RCU data structures. TINY_RCU has avoided them for memory-footprint reasons, so add them only if CONFIG_RCU_TRACE=y. Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu.h')
-rw-r--r--kernel/rcu.h10
1 files changed, 8 insertions, 2 deletions
diff --git a/kernel/rcu.h b/kernel/rcu.h
index 7bc16436aba0..d7f00ec8b47b 100644
--- a/kernel/rcu.h
+++ b/kernel/rcu.h
@@ -23,6 +23,12 @@
#ifndef __LINUX_RCU_H
#define __LINUX_RCU_H
+#ifdef CONFIG_RCU_TRACE
+#define RCU_TRACE(stmt) stmt
+#else /* #ifdef CONFIG_RCU_TRACE */
+#define RCU_TRACE(stmt)
+#endif /* #else #ifdef CONFIG_RCU_TRACE */
+
/*
* debug_rcu_head_queue()/debug_rcu_head_unqueue() are used internally
* by call_rcu() and rcu callback execution, and are therefore not part of the
@@ -68,10 +74,10 @@ static inline void __rcu_reclaim(struct rcu_head *head)
unsigned long offset = (unsigned long)head->func;
if (__is_kfree_rcu_offset(offset)) {
- trace_rcu_invoke_kfree_callback(head, offset);
+ RCU_TRACE(trace_rcu_invoke_kfree_callback(head, offset));
kfree((void *)head - offset);
} else {
- trace_rcu_invoke_callback(head);
+ RCU_TRACE(trace_rcu_invoke_callback(head));
head->func(head);
}
}