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| author | Paul E. McKenney <paul.mckenney@linaro.org> | 2011-06-21 00:13:44 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2011-09-28 21:38:14 -0700 |
| commit | e99033c5c160f1f247c665923a66acec693a967c (patch) | |
| tree | c5b0863ad4b673134070872a159055237186f0fe /kernel/rcu.h | |
| parent | 300df91ca9358f7f09298eec9503c12b32054ef7 (diff) | |
| download | lwn-e99033c5c160f1f247c665923a66acec693a967c.tar.gz lwn-e99033c5c160f1f247c665923a66acec693a967c.zip | |
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.h | 10 |
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); } } |