diff options
Diffstat (limited to 'drivers/staging/lustre/include/linux/libcfs/libcfs_workitem.h')
-rw-r--r-- | drivers/staging/lustre/include/linux/libcfs/libcfs_workitem.h | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/drivers/staging/lustre/include/linux/libcfs/libcfs_workitem.h b/drivers/staging/lustre/include/linux/libcfs/libcfs_workitem.h deleted file mode 100644 index fc780f608e57..000000000000 --- a/drivers/staging/lustre/include/linux/libcfs/libcfs_workitem.h +++ /dev/null @@ -1,107 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * GPL HEADER START - * - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 only, - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License version 2 for more details (a copy is included - * in the LICENSE file that accompanied this code). - * - * You should have received a copy of the GNU General Public License - * version 2 along with this program; If not, see - * http://www.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2012, Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - * - * libcfs/include/libcfs/libcfs_workitem.h - * - * Author: Isaac Huang <he.h.huang@oracle.com> - * Liang Zhen <zhen.liang@sun.com> - * - * A workitems is deferred work with these semantics: - * - a workitem always runs in thread context. - * - a workitem can be concurrent with other workitems but is strictly - * serialized with respect to itself. - * - no CPU affinity, a workitem does not necessarily run on the same CPU - * that schedules it. However, this might change in the future. - * - if a workitem is scheduled again before it has a chance to run, it - * runs only once. - * - if a workitem is scheduled while it runs, it runs again after it - * completes; this ensures that events occurring while other events are - * being processed receive due attention. This behavior also allows a - * workitem to reschedule itself. - * - * Usage notes: - * - a workitem can sleep but it should be aware of how that sleep might - * affect others. - * - a workitem runs inside a kernel thread so there's no user space to access. - * - do not use a workitem if the scheduling latency can't be tolerated. - * - * When wi_action returns non-zero, it means the workitem has either been - * freed or reused and workitem scheduler won't touch it any more. - */ - -#ifndef __LIBCFS_WORKITEM_H__ -#define __LIBCFS_WORKITEM_H__ - -struct cfs_wi_sched; - -void cfs_wi_sched_destroy(struct cfs_wi_sched *sched); -int cfs_wi_sched_create(char *name, struct cfs_cpt_table *cptab, int cpt, - int nthrs, struct cfs_wi_sched **sched_pp); - -struct cfs_workitem; - -typedef int (*cfs_wi_action_t) (struct cfs_workitem *); -struct cfs_workitem { - /** chain on runq or rerunq */ - struct list_head wi_list; - /** working function */ - cfs_wi_action_t wi_action; - /** arg for working function */ - void *wi_data; - /** in running */ - unsigned short wi_running:1; - /** scheduled */ - unsigned short wi_scheduled:1; -}; - -static inline void -cfs_wi_init(struct cfs_workitem *wi, void *data, cfs_wi_action_t action) -{ - INIT_LIST_HEAD(&wi->wi_list); - - wi->wi_running = 0; - wi->wi_scheduled = 0; - wi->wi_data = data; - wi->wi_action = action; -} - -void cfs_wi_schedule(struct cfs_wi_sched *sched, struct cfs_workitem *wi); -int cfs_wi_deschedule(struct cfs_wi_sched *sched, struct cfs_workitem *wi); -void cfs_wi_exit(struct cfs_wi_sched *sched, struct cfs_workitem *wi); - -int cfs_wi_startup(void); -void cfs_wi_shutdown(void); - -/** # workitem scheduler loops before reschedule */ -#define CFS_WI_RESCHED 128 - -#endif /* __LIBCFS_WORKITEM_H__ */ |