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Lai Jiangshan 1726a17135 workqueue: Put PWQ allocation and WQ enlistment in the same lock C.S.
The PWQ allocation and WQ enlistment are not within the same lock-held
critical section; therefore, their states can become out of sync when
the user modifies the unbound mask or if CPU hotplug events occur in
the interim since those operations only update the WQs that are already
in the list.

Make the PWQ allocation and WQ enlistment atomic.

Signed-off-by: Lai Jiangshan <jiangshan.ljs@antgroup.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2024-07-05 09:14:40 -10:00
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kernel workqueue: Put PWQ allocation and WQ enlistment in the same lock C.S. 2024-07-05 09:14:40 -10:00
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Linux kernel
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