On 05/30/2012 02:28 PM, Tejun Heo wrote:
Hello,
On Wed, May 30, 2012 at 3:28 PM, Asias He<asias@xxxxxxxxxx> wrote:
Isn't the 'if' clause superfluous ? You could just do the assignment,
e.g.,
+ spin_lock_irq(lock);
+ q->queue_lock =&q->__queue_lock;
+ spin_unlock_irq(lock);
Well, this saves a if clause but adds an unnecessary assignment if the lock
is already internal lock.
It's not hot path. Dirtying the cacheline there doesn't mean anything.
I don't really care either way but making optimization argument is
pretty silly here.
I don't care this neither ;-)
--
Asias
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