From c9178087acd71b4ea010ea48e147cf66952d2da9 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 12 Mar 2013 11:30:04 -0700 Subject: [PATCH] workqueue: perform non-reentrancy test when queueing to unbound workqueues too Because per-cpu workqueues have multiple pwqs (pool_workqueues) to serve the CPUs, to guarantee that a single work item isn't queued on one pwq while still executing another, __queue_work() takes a look at the previous pool the target work item was on and if it's still executing there, queue the work item on that pool. To support changing workqueue_attrs on the fly, unbound workqueues too will have multiple pwqs and thus need non-reentrancy test when queueing. This patch modifies __queue_work() such that the reentrancy test is performed regardless of the workqueue type. per_cpu_ptr(wq->cpu_pwqs, cpu) used to be used to determine the matching pwq for the last pool. This can't be used for unbound workqueues and is replaced with worker->current_pwq which also happens to be simpler. Signed-off-by: Tejun Heo Reviewed-by: Lai Jiangshan --- Reading git-format-patch failed