workqueue: implement several utility APIs

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Implement the following utility APIs.

 workqueue_set_max_active()	: adjust max_active of a wq
 workqueue_congested()		: test whether a wq is contested
 work_cpu()			: determine the last / current cpu of a work
 work_busy()			: query whether a work is busy

* Anton Blanchard fixed missing ret initialization in work_busy().

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Anton Blanchard <anton@samba.org>

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Tejun Heo 2010-06-29 10:07:14 +02:00

parent d320c03830

commit dcd989cb73

2 changed files with 117 additions and 2 deletions

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11

include/linux/workqueue.h

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