tree 0478e5dde66f6ff86d4baa0fe541748e1a6f1ed2
parent f34217977d717385a3e9fd7018ac39fade3964c0
author Tejun Heo <tj@kernel.org> 1278057831 +0200
committer Tejun Heo <tj@kernel.org> 1278061208 +0200

workqueue: remove WQ_SINGLE_CPU and use WQ_UNBOUND instead

WQ_SINGLE_CPU combined with @max_active of 1 is used to achieve full
ordering among works queued to a workqueue.  The same can be achieved
using WQ_UNBOUND as unbound workqueues always use the gcwq for
WORK_CPU_UNBOUND.  As @max_active is always one and benefits from cpu
locality isn't accessible anyway, serving them with unbound workqueues
should be fine.

Drop WQ_SINGLE_CPU support and use WQ_UNBOUND instead.  Note that most
single thread workqueue users will be converted to use multithread or
non-reentrant instead and only the ones which require strict ordering
will keep using WQ_UNBOUND + @max_active of 1.

Signed-off-by: Tejun Heo <tj@kernel.org>