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From: Paul E. McKenney on 26 Feb 2010 19:40
Before the scheduler starts, all tasks are non-preemptible by
definition. So, during that time, rcu_read_lock_sched_held()
needs to always return "true". This patch makes that be so
for RCU_PROVE_LOCKING=n.

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

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index fcea332..c843736 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -166,7 +166,7 @@ static inline int rcu_read_lock_bh_held(void)

static inline int rcu_read_lock_sched_held(void)
{
- return preempt_count() != 0;
+ return preempt_count() != 0 || !rcu_scheduler_active;
}

#endif /* #else #ifdef CONFIG_DEBUG_LOCK_ALLOC */
--
1.6.6

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