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Commit 81dcaf65 authored by Tejun Heo's avatar Tejun Heo
Browse files

workqueue: implement alloc_ordered_workqueue() 



alloc_ordered_workqueue() creates a workqueue which processes each
work itemp one by one in the queued order.  This will be used to
replace create_freezeable_workqueue() and
create_singlethread_workqueue().

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 151b6a5f

include/linux/workqueue.h

+18 −0
Original line number Diff line number Diff line
@@ -306,6 +306,24 @@ __alloc_workqueue_key(const char *name, unsigned int flags, int max_active, 
	__alloc_workqueue_key((name), (flags), (max_active), NULL, NULL)

#endif



/**

 * alloc_ordered_workqueue - allocate an ordered workqueue

 * @name: name of the workqueue

 * @flags: WQ_* flags (only WQ_FREEZEABLE and WQ_RESCUER are meaningful)

 *

 * Allocate an ordered workqueue.  An ordered workqueue executes at

 * most one work item at any given time in the queued order.  They are

 * implemented as unbound workqueues with @max_active of one.

 *

 * RETURNS:

 * Pointer to the allocated workqueue on success, %NULL on failure.

 */

static inline struct workqueue_struct *

alloc_ordered_workqueue(const char *name, unsigned int flags)

{

	return alloc_workqueue(name, WQ_UNBOUND | flags, 1);

}



#define create_workqueue(name)					\

	alloc_workqueue((name), WQ_RESCUER, 1)

#define create_freezeable_workqueue(name)			\