关于<代码> 避免锁定_irqsave(spinlock_t *lock, unsign longcodes);功能电话。 有人提到,先前的中断状态储存在旗帜中,我们可以通过将这种状态通过到<条码>上来恢复。
但是,我没有看到通过价值通过的旗帜在打上了先前的打断状态,而打上了<代码>spin_lock_irqsave。
<代码>spin_lock_irqsave是一个宏观而非功能。 因此,可以指定<代码>flags。 即便这显然具有价值。
见:
http://lxr.linux.no/#linux+v2.6.35.4/include/linux/spinlock.h#L312
http://lxr.linux.no/#linux+v2.6.35.4/include/linux/spinlock.h#L187
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