mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 06:04:14 +08:00
52722794d6
Async kept single global pending list and per-domain running lists. When an async item is queued, it's put on the global pending list. The item is moved to the per-domain running list when its execution starts. At this point, this design complicates execution and synchronization without bringing any benefit. The list only matters for synchronization which doesn't care whether a given async item is pending or executing. Also, global synchronization is done by iterating through all active registered async_domains, so the global async_pending list doesn't help anything either. Rename async_domain->running to async_domain->pending and put async items directly there and remove when execution completes. This simplifies lowest_in_progress() a lot - the first item on the pending list is the one with the lowest cookie, and async_run_entry_fn() doesn't have to mess with moving the item from pending to running. After the change, whether a domain is empty or not can be trivially determined by looking at async_domain->pending. Remove async_domain->count and use list_empty() on pending instead. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Dan Williams <djbw@fb.com> Cc: Linus Torvalds <torvalds@linux-foundation.org>
54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
/*
|
|
* async.h: Asynchronous function calls for boot performance
|
|
*
|
|
* (C) Copyright 2009 Intel Corporation
|
|
* Author: Arjan van de Ven <arjan@linux.intel.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; version 2
|
|
* of the License.
|
|
*/
|
|
#ifndef __ASYNC_H__
|
|
#define __ASYNC_H__
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/list.h>
|
|
|
|
typedef u64 async_cookie_t;
|
|
typedef void (async_func_ptr) (void *data, async_cookie_t cookie);
|
|
struct async_domain {
|
|
struct list_head node;
|
|
struct list_head pending;
|
|
unsigned registered:1;
|
|
};
|
|
|
|
/*
|
|
* domain participates in global async_synchronize_full
|
|
*/
|
|
#define ASYNC_DOMAIN(_name) \
|
|
struct async_domain _name = { .node = LIST_HEAD_INIT(_name.node), \
|
|
.pending = LIST_HEAD_INIT(_name.pending), \
|
|
.registered = 1 }
|
|
|
|
/*
|
|
* domain is free to go out of scope as soon as all pending work is
|
|
* complete, this domain does not participate in async_synchronize_full
|
|
*/
|
|
#define ASYNC_DOMAIN_EXCLUSIVE(_name) \
|
|
struct async_domain _name = { .node = LIST_HEAD_INIT(_name.node), \
|
|
.pending = LIST_HEAD_INIT(_name.pending), \
|
|
.registered = 0 }
|
|
|
|
extern async_cookie_t async_schedule(async_func_ptr *ptr, void *data);
|
|
extern async_cookie_t async_schedule_domain(async_func_ptr *ptr, void *data,
|
|
struct async_domain *domain);
|
|
void async_unregister_domain(struct async_domain *domain);
|
|
extern void async_synchronize_full(void);
|
|
extern void async_synchronize_full_domain(struct async_domain *domain);
|
|
extern void async_synchronize_cookie(async_cookie_t cookie);
|
|
extern void async_synchronize_cookie_domain(async_cookie_t cookie,
|
|
struct async_domain *domain);
|
|
extern bool current_is_async(void);
|
|
#endif
|