workqueue: Add interface for user-defined workqueue lockdep map

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Add an interface for a user-defined workqueue lockdep map, which is
helpful when multiple workqueues are created for the same purpose. This
also helps avoid leaking lockdep maps on each workqueue creation.

v2:
 - Add alloc_workqueue_lockdep_map (Tejun)
v3:
 - Drop __WQ_USER_OWNED_LOCKDEP (Tejun)
 - static inline alloc_ordered_workqueue_lockdep_map (Tejun)

Cc: Tejun Heo <tj@kernel.org>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

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Matthew Brost 2024-08-09 15:28:25 -07:00 • committed by Tejun Heo

parent 4f022f430e

commit ec0a7d44b3

2 changed files with 80 additions and 0 deletions

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52

include/linux/workqueue.h

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28

kernel/workqueue.c

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