+++ /dev/null
-/*
- * smpprim.h: SMP locking primitives on the Sparc
- *
- * God knows we won't be actually using this code for some time
- * but I thought I'd write it since I knew how.
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- */
-
-#ifndef __SPARC_SMPPRIM_H
-#define __SPARC_SMPPRIM_H
-
-/* Test and set the unsigned byte at ADDR to 1. Returns the previous
- * value. On the Sparc we use the ldstub instruction since it is
- * atomic.
- */
-
-static inline __volatile__ char test_and_set(void *addr)
-{
- char state = 0;
-
- __asm__ __volatile__("ldstub [%0], %1 ! test_and_set\n\t"
- "=r" (addr), "=r" (state) :
- "0" (addr), "1" (state) : "memory");
-
- return state;
-}
-
-/* Initialize a spin-lock. */
-static inline __volatile__ smp_initlock(void *spinlock)
-{
- /* Unset the lock. */
- *((unsigned char *) spinlock) = 0;
-
- return;
-}
-
-/* This routine spins until it acquires the lock at ADDR. */
-static inline __volatile__ smp_lock(void *addr)
-{
- while(test_and_set(addr) == 0xff)
- ;
-
- /* We now have the lock */
- return;
-}
-
-/* This routine releases the lock at ADDR. */
-static inline __volatile__ smp_unlock(void *addr)
-{
- *((unsigned char *) addr) = 0;
-}
-
-#endif /* !(__SPARC_SMPPRIM_H) */