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From: Paul E. McKenney on 22 Feb 2010 20:10
As suggested by Peter Ziljstra, make better choice of name
for for_each_domain_rd(), containing "rcu_dereference", given
that it is but a wrapper for rcu_dereference_check(). The name
rcu_dereference_check_sched_domain() does that and provides a separate
per-subsystem name space.

Signed-off-by: Paul E. McKenney <paulmck(a)linux.vnet.ibm.com>
---
kernel/sched.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index ad419d9..478fc7d 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -645,7 +645,7 @@ static inline int cpu_of(struct rq *rq)
#endif
}

-#define for_each_domain_rd(p) \
+#define rcu_dereference_check_sched_domain(p) \
rcu_dereference_check((p), \
rcu_read_lock_sched_held() || \
lockdep_is_held(&sched_domains_mutex))
@@ -658,7 +658,7 @@ static inline int cpu_of(struct rq *rq)
* preempt-disabled sections.
*/
#define for_each_domain(cpu, __sd) \
- for (__sd = for_each_domain_rd(cpu_rq(cpu)->sd); __sd; __sd = __sd->parent)
+ for (__sd = rcu_dereference_check_sched_domain(cpu_rq(cpu)->sd); __sd; __sd = __sd->parent)

#define cpu_rq(cpu) (&per_cpu(runqueues, (cpu)))
#define this_rq() (&__get_cpu_var(runqueues))
--
1.6.6

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