Messages in this thread Patch in this message | | | From | Lai Jiangshan <> | Subject | [PATCH 2/8] rcu: remove irq/softirq context check in rcu_read_unlock_special() | Date | Wed, 7 Aug 2013 18:24:58 +0800 |
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After patch 10f39bb1, "special & RCU_READ_UNLOCK_BLOCKED" can't be true in irq nor softirq.(due to RCU_READ_UNLOCK_BLOCKED can only be set when preemption)
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> --- kernel/rcutree_plugin.h | 6 ------ 1 files changed, 0 insertions(+), 6 deletions(-)
diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h index 8fd947e..54f7e45 100644 --- a/kernel/rcutree_plugin.h +++ b/kernel/rcutree_plugin.h @@ -361,12 +361,6 @@ void rcu_read_unlock_special(struct task_struct *t) rcu_preempt_qs(smp_processor_id()); } - /* Hardware IRQ handlers cannot block. */ - if (in_irq() || in_serving_softirq()) { - local_irq_restore(flags); - return; - } - /* Clean up if blocked during RCU read-side critical section. */ if (special & RCU_READ_UNLOCK_BLOCKED) { t->rcu_read_unlock_special &= ~RCU_READ_UNLOCK_BLOCKED; -- 1.7.4.4
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