Commit-ID: 7a11e2058f02feb6884efb067f328012c318a13f
Gitweb: http://git.kernel.org/tip/7a11e2058f02feb6884efb067f328012c318a13f
Author: Paul E. McKenney <paul.mckenney@xxxxxxxxxx>
AuthorDate: Tue, 21 Aug 2012 12:14:19 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Sun, 23 Sep 2012 07:42:51 -0700
rcu: Move TINY_PREEMPT_RCU away from raw_local_irq_save()
The use of raw_local_irq_save() is unnecessary, given that local_irq_save()
really does disable interrupts. Also, it appears to interfere with lockdep.
Therefore, this commit moves to local_irq_save().
Reported-by: Fengguang Wu <fengguang.wu@xxxxxxxxx>
Signed-off-by: Paul E. McKenney <paul.mckenney@xxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Tested-by: Fengguang Wu <fengguang.wu@xxxxxxxxx>
---
kernel/rcutiny_plugin.h | 10 +++++-----
1 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/kernel/rcutiny_plugin.h b/kernel/rcutiny_plugin.h
index 918fd1e..3d01902 100644
--- a/kernel/rcutiny_plugin.h
+++ b/kernel/rcutiny_plugin.h
@@ -278,7 +278,7 @@ static int rcu_boost(void)
rcu_preempt_ctrlblk.exp_tasks == NULL)
return 0; /* Nothing to boost. */
- raw_local_irq_save(flags);
+ local_irq_save(flags);
/*
* Recheck with irqs disabled: all tasks in need of boosting
@@ -287,7 +287,7 @@ static int rcu_boost(void)
*/
if (rcu_preempt_ctrlblk.boost_tasks == NULL &&
rcu_preempt_ctrlblk.exp_tasks == NULL) {
- raw_local_irq_restore(flags);
+ local_irq_restore(flags);
return 0;
}
@@ -317,7 +317,7 @@ static int rcu_boost(void)
t = container_of(tb, struct task_struct, rcu_node_entry);
rt_mutex_init_proxy_locked(&mtx, t);
t->rcu_boost_mutex = &mtx;
- raw_local_irq_restore(flags);
+ local_irq_restore(flags);
rt_mutex_lock(&mtx);
rt_mutex_unlock(&mtx); /* Keep lockdep happy. */
@@ -991,9 +991,9 @@ static void rcu_trace_sub_qlen(struct rcu_ctrlblk *rcp, int n)
{
unsigned long flags;
- raw_local_irq_save(flags);
+ local_irq_save(flags);
rcp->qlen -= n;
- raw_local_irq_restore(flags);
+ local_irq_restore(flags);
}
/*
--
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