arch/metag/include/asm/spinlock.h

   1 #ifndef __ASM_SPINLOCK_H
   2 #define __ASM_SPINLOCK_H
   3
   4 #include <asm/barrier.h>
   5 #include <asm/processor.h>
   6
   7 #ifdef CONFIG_METAG_ATOMICITY_LOCK1
   8 #include <asm/spinlock_lock1.h>
   9 #else
  10 #include <asm/spinlock_lnkget.h>
  11 #endif
  12
  13 /*
  14  * both lock1 and lnkget are test-and-set spinlocks with 0 unlocked and 1
  15  * locked.
  16  */
  17
  18 static inline void arch_spin_unlock_wait(arch_spinlock_t *lock)
  19 {
  20         smp_cond_load_acquire(&lock->lock, !VAL);
  21 }
  22
  23 #define arch_spin_lock_flags(lock, flags) arch_spin_lock(lock)
  24
  25 #define arch_read_lock_flags(lock, flags) arch_read_lock(lock)
  26 #define arch_write_lock_flags(lock, flags) arch_write_lock(lock)
  27
  28 #define arch_spin_relax(lock)   cpu_relax()
  29 #define arch_read_relax(lock)   cpu_relax()
  30 #define arch_write_relax(lock)  cpu_relax()
  31
  32 #endif /* __ASM_SPINLOCK_H */