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- /*
- * Internal Header for the Direct Rendering Manager
- *
- * Copyright 2018 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- */
- #ifndef _DRM_UTIL_H_
- #define _DRM_UTIL_H_
- /**
- * DOC: drm utils
- *
- * Macros and inline functions that does not naturally belong in other places
- */
- #include <linux/interrupt.h>
- #include <linux/kgdb.h>
- #include <linux/preempt.h>
- #include <linux/smp.h>
- /*
- * Use EXPORT_SYMBOL_FOR_TESTS_ONLY() for functions that shall
- * only be visible for drmselftests.
- */
- #if defined(CONFIG_DRM_EXPORT_FOR_TESTS)
- #define EXPORT_SYMBOL_FOR_TESTS_ONLY(x) EXPORT_SYMBOL(x)
- #else
- #define EXPORT_SYMBOL_FOR_TESTS_ONLY(x)
- #endif
- /**
- * for_each_if - helper for handling conditionals in various for_each macros
- * @condition: The condition to check
- *
- * Typical use::
- *
- * #define for_each_foo_bar(x, y) \'
- * list_for_each_entry(x, y->list, head) \'
- * for_each_if(x->something == SOMETHING)
- *
- * The for_each_if() macro makes the use of for_each_foo_bar() less error
- * prone.
- */
- #define for_each_if(condition) if (!(condition)) {} else
- /**
- * drm_can_sleep - returns true if currently okay to sleep
- *
- * This function shall not be used in new code.
- * The check for running in atomic context may not work - see linux/preempt.h.
- *
- * FIXME: All users of drm_can_sleep should be removed (see todo.rst)
- *
- * Returns:
- * False if kgdb is active, we are in atomic context or irqs are disabled.
- */
- static inline bool drm_can_sleep(void)
- {
- if (in_atomic() || in_dbg_master() || irqs_disabled())
- return false;
- return true;
- }
- #endif
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