1 /* 1
2 * Internal Header for the Direct Rendering Ma
3 *
4 * Copyright 2018 Intel Corporation
5 *
6 * Permission is hereby granted, free of charg
7 * copy of this software and associated docume
8 * to deal in the Software without restriction
9 * the rights to use, copy, modify, merge, pub
10 * and/or sell copies of the Software, and to
11 * Software is furnished to do so, subject to
12 *
13 * The above copyright notice and this permiss
14 * paragraph) shall be included in all copies
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT W
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE W
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINF
20 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LI
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CO
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH
23 * OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26 #ifndef _DRM_UTIL_H_
27 #define _DRM_UTIL_H_
28
29 /**
30 * DOC: drm utils
31 *
32 * Macros and inline functions that does not n
33 */
34
35 #include <linux/interrupt.h>
36 #include <linux/kgdb.h>
37 #include <linux/preempt.h>
38 #include <linux/smp.h>
39
40 /*
41 * Use EXPORT_SYMBOL_FOR_TESTS_ONLY() for func
42 * only be visible for drmselftests.
43 */
44 #if defined(CONFIG_DRM_EXPORT_FOR_TESTS)
45 #define EXPORT_SYMBOL_FOR_TESTS_ONLY(x) EXPORT
46 #else
47 #define EXPORT_SYMBOL_FOR_TESTS_ONLY(x)
48 #endif
49
50 /**
51 * for_each_if - helper for handling condition
52 * @condition: The condition to check
53 *
54 * Typical use::
55 *
56 * #define for_each_foo_bar(x, y) \'
57 * list_for_each_entry(x, y->list
58 * for_each_if(x->somethi
59 *
60 * The for_each_if() macro makes the use of fo
61 * prone.
62 */
63 #define for_each_if(condition) if (!(condition
64
65 /**
66 * drm_can_sleep - returns true if currently o
67 *
68 * This function shall not be used in new code
69 * The check for running in atomic context may
70 *
71 * FIXME: All users of drm_can_sleep should be
72 *
73 * Returns:
74 * False if kgdb is active, we are in atomic c
75 */
76 static inline bool drm_can_sleep(void)
77 {
78 if (in_atomic() || in_dbg_master() ||
79 return false;
80 return true;
81 }
82
83 #endif
84
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