root/drivers/gpu/drm/i915/selftests/igt_atomic.h

INCLUDED FROM

DEFINITIONS

1. __preempt_begin
2. __preempt_end
3. __softirq_begin
4. __softirq_end
5. __hardirq_begin
6. __hardirq_end

   1 /* SPDX-License-Identifier: MIT */
   2 /*
   3  * Copyright © 2018 Intel Corporation
   4  */
   5 
   6 #ifndef IGT_ATOMIC_H
   7 #define IGT_ATOMIC_H
   8 
   9 #include <linux/preempt.h>
  10 #include <linux/bottom_half.h>
  11 #include <linux/irqflags.h>
  12 
  13 static void __preempt_begin(void)
  14 {
  15         preempt_disable();
  16 }
  17 
  18 static void __preempt_end(void)
  19 {
  20         preempt_enable();
  21 }
  22 
  23 static void __softirq_begin(void)
  24 {
  25         local_bh_disable();
  26 }
  27 
  28 static void __softirq_end(void)
  29 {
  30         local_bh_enable();
  31 }
  32 
  33 static void __hardirq_begin(void)
  34 {
  35         local_irq_disable();
  36 }
  37 
  38 static void __hardirq_end(void)
  39 {
  40         local_irq_enable();
  41 }
  42 
  43 struct igt_atomic_section {
  44         const char *name;
  45         void (*critical_section_begin)(void);
  46         void (*critical_section_end)(void);
  47 };
  48 
  49 static const struct igt_atomic_section igt_atomic_phases[] = {
  50         { "preempt", __preempt_begin, __preempt_end },
  51         { "softirq", __softirq_begin, __softirq_end },
  52         { "hardirq", __hardirq_begin, __hardirq_end },
  53         { }
  54 };
  55 
  56 #endif /* IGT_ATOMIC_H */