projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 786d7257 ML |
1 | /* |
| 2 | * Header file for reservations for dma-buf and ttm | |
| 3 | * | |
| 4 | * Copyright(C) 2011 Linaro Limited. All rights reserved. | |
| 5 | * Copyright (C) 2012-2013 Canonical Ltd | |
| 6 | * Copyright (C) 2012 Texas Instruments | |
| 7 | * | |
| 8 | * Authors: | |
| 9 | * Rob Clark <rob.clark@linaro.org> | |
| 10 | * Maarten Lankhorst <maarten.lankhorst@canonical.com> | |
| 11 | * Thomas Hellstrom <thellstrom-at-vmware-dot-com> | |
| 12 | * | |
| 13 | * Based on bo.c which bears the following copyright notice, | |
| 14 | * but is dual licensed: | |
| 15 | * | |
| 16 | * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA | |
| 17 | * All Rights Reserved. | |
| 18 | * | |
| 19 | * Permission is hereby granted, free of charge, to any person obtaining a | |
| 20 | * copy of this software and associated documentation files (the | |
| 21 | * "Software"), to deal in the Software without restriction, including | |
| 22 | * without limitation the rights to use, copy, modify, merge, publish, | |
| 23 | * distribute, sub license, and/or sell copies of the Software, and to | |
| 24 | * permit persons to whom the Software is furnished to do so, subject to | |
| 25 | * the following conditions: | |
| 26 | * | |
| 27 | * The above copyright notice and this permission notice (including the | |
| 28 | * next paragraph) shall be included in all copies or substantial portions | |
| 29 | * of the Software. | |
| 30 | * | |
| 31 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| 32 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| 33 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | |
| 34 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
| 35 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
| 36 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
| 37 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
| 38 | */ | |
| 39 | #ifndef _LINUX_RESERVATION_H | |
| 40 | #define _LINUX_RESERVATION_H | |
| 41 | ||
| 1b375dc3 | 42 | #include <linux/ww_mutex.h> |
| 786d7257 ML |
43 | |
| 44 | extern struct ww_class reservation_ww_class; | |
| 45 | ||
| 46 | struct reservation_object { | |
| 47 | struct ww_mutex lock; | |
| 48 | }; | |
| 49 | ||
| 50 | static inline void | |
| 51 | reservation_object_init(struct reservation_object *obj) | |
| 52 | { | |
| 53 | ww_mutex_init(&obj->lock, &reservation_ww_class); | |
| 54 | } | |
| 55 | ||
| 56 | static inline void | |
| 57 | reservation_object_fini(struct reservation_object *obj) | |
| 58 | { | |
| 59 | ww_mutex_destroy(&obj->lock); | |
| 60 | } | |
| 61 | ||
| 62 | #endif /* _LINUX_RESERVATION_H */ |