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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@intel.com>
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Fengguang Wu <fengguang.wu@intel.com>
hifive-unleashed-5.1
Paul E. McKenney 2012-08-21 12:14:19 -07:00 committed by Paul E. McKenney
parent fdab649b1a
commit 7a11e2058f
1 changed files with 5 additions and 5 deletions
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10
kernel/rcutiny_plugin.h
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@ -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);
}
/*