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workqueue: use "pool->cpu < 0" to stand for an unbound pool

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There is a piece of sanity checks code in the put_unbound_pool().
The meaning of this code is "if it is not an unbound pool, it will complain
and return" IIUC. But the code uses "pool->flags & POOL_DISASSOCIATED"
imprecisely due to a non-unbound pool may also have this flags.

We should use "pool->cpu < 0" to stand for an unbound pool, so we covert the
code to it.

There is no strictly wrong if we still keep "pool->flags & POOL_DISASSOCIATED"
here, but it is just a noise if we keep it:
  1) we focus on "unbound" here, not "[dis]association".
  2) "pool->cpu < 0" already implies "pool->flags & POOL_DISASSOCIATED".

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Lai Jiangshan 2014-06-03 15:31:45 +08:00 committed by Tejun Heo
parent ebe06187bf
commit 61d0fbb4b6
1 changed files with 1 additions and 1 deletions
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2
kernel/workqueue.c
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@ -3457,7 +3457,7 @@ static void put_unbound_pool(struct worker_pool *pool)
return;
/* sanity checks */
if (WARN_ON(!(pool->flags & POOL_DISASSOCIATED)) ||
if (WARN_ON(!(pool->cpu < 0)) ||
WARN_ON(!list_empty(&pool->worklist)))
return;