arch/arm64/include/asm/spinlock.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2012 ARM Ltd.
   4  */
   5 #ifndef __ASM_SPINLOCK_H
   6 #define __ASM_SPINLOCK_H
   7
   8 #include <asm/qrwlock.h>
   9 #include <asm/qspinlock.h>
  10
  11 /* See include/linux/spinlock.h */
  12 #define smp_mb__after_spinlock()        smp_mb()
  13
  14 /*
  15  * Changing this will break osq_lock() thanks to the call inside
  16  * smp_cond_load_relaxed().
  17  *
  18  * See:
  19  * https://lore.kernel.org/lkml/20200110100612.GC2827@hirez.programming.kicks-ass.net
  20  */
  21 #define vcpu_is_preempted vcpu_is_preempted
  22 static inline bool vcpu_is_preempted(int cpu)
  23 {
  24         return false;
  25 }
  26
  27 #endif /* __ASM_SPINLOCK_H */