diff options
Diffstat (limited to 'drivers/staging/lustre/include/linux/libcfs/libcfs_prim.h')
| -rw-r--r-- | drivers/staging/lustre/include/linux/libcfs/libcfs_prim.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/drivers/staging/lustre/include/linux/libcfs/libcfs_prim.h b/drivers/staging/lustre/include/linux/libcfs/libcfs_prim.h new file mode 100644 index 000000000000..9c40ed904da5 --- /dev/null +++ b/drivers/staging/lustre/include/linux/libcfs/libcfs_prim.h @@ -0,0 +1,101 @@ +/* + * 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.sun.com/software/products/lustre/docs/GPLv2.pdf + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + * GPL HEADER END + */ +/* + * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + * + * libcfs/include/libcfs/libcfs_prim.h + * + * General primitives. + * + */ + +#ifndef __LIBCFS_PRIM_H__ +#define __LIBCFS_PRIM_H__ + +#ifndef EXPORT_SYMBOL +# define EXPORT_SYMBOL(s) +#endif + +/* + * Schedule + */ +void cfs_pause(cfs_duration_t ticks); + +/* + * Timer + */ +typedef void (cfs_timer_func_t)(ulong_ptr_t); +void schedule_timeout_and_set_state(cfs_task_state_t, int64_t); + +void init_waitqueue_entry_current(wait_queue_t *link); +int64_t waitq_timedwait(wait_queue_t *, cfs_task_state_t, int64_t); +void waitq_wait(wait_queue_t *, cfs_task_state_t); +void add_wait_queue_exclusive_head(wait_queue_head_t *, wait_queue_t *); + +void cfs_init_timer(timer_list_t *t); +void cfs_timer_init(timer_list_t *t, cfs_timer_func_t *func, void *arg); +void cfs_timer_done(timer_list_t *t); +void cfs_timer_arm(timer_list_t *t, cfs_time_t deadline); +void cfs_timer_disarm(timer_list_t *t); +int cfs_timer_is_armed(timer_list_t *t); +cfs_time_t cfs_timer_deadline(timer_list_t *t); + +/* + * Memory + */ +#ifndef memory_pressure_get +#define memory_pressure_get() (0) +#endif +#ifndef memory_pressure_set +#define memory_pressure_set() do {} while (0) +#endif +#ifndef memory_pressure_clr +#define memory_pressure_clr() do {} while (0) +#endif + +static inline int cfs_memory_pressure_get_and_set(void) +{ + int old = memory_pressure_get(); + + if (!old) + memory_pressure_set(); + return old; +} + +static inline void cfs_memory_pressure_restore(int old) +{ + if (old) + memory_pressure_set(); + else + memory_pressure_clr(); + return; +} +#endif |