arch/arm64/include/asm/simd.h

   1 /*
   2  * Copyright (C) 2017 Linaro Ltd. <ard.biesheuvel@linaro.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 as published
   6  * by the Free Software Foundation.
   7  */
   8
   9 #ifndef __ASM_SIMD_H
  10 #define __ASM_SIMD_H
  11
  12 #include <linux/types.h>
  13
  14 /*
  15  * may_use_simd - whether it is allowable at this time to issue SIMD
  16  *                instructions or access the SIMD register file
  17  */
  18 static __must_check inline bool may_use_simd(void)
  19 {
  20 <<<<<<< HEAD
  21         return true;
  22 =======
  23         /*
  24          * kernel_neon_busy is only set while preemption is disabled,
  25          * and is clear whenever preemption is enabled. Since
  26          * this_cpu_read() is atomic w.r.t. preemption, kernel_neon_busy
  27          * cannot change under our feet -- if it's set we cannot be
  28          * migrated, and if it's clear we cannot be migrated to a CPU
  29          * where it is set.
  30          */
  31         return !in_irq() && !irqs_disabled() && !in_nmi() &&
  32                 !this_cpu_read(kernel_neon_busy);
  33 >>>>>>> 818299f6bdae
  34 }
  35
  36 #endif