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rcu: Put names into TINY_RCU structures under RCU_TRACE

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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>
This commit is contained in:
Paul E. McKenney
2011-06-21 00:13:44 -07:00
committed by Paul E. McKenney
parent 300df91ca9
commit e99033c5c1
5 changed files with 18 additions and 27 deletions
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10
kernel/rcu.h
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@@ -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);
}
}