* Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org>
*/
-#include <linux/config.h> /* CONFIG_DEBUG_SPINLOCK, CONFIG_SMP */
#include <linux/compiler.h>
#include <asm/atomic.h>
#include <asm/page.h>
);
}
-#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
+static inline int __raw_read_trylock(raw_rwlock_t *lock)
+{
+ atomic_t *count = (atomic_t*)lock;
+ if (atomic_dec_return(count) >= 0)
+ return 1;
+ atomic_inc(count);
+ return 0;
+}
static inline int __raw_write_trylock(raw_rwlock_t *lock)
{
return 0;
}
+#define _raw_spin_relax(lock) cpu_relax()
+#define _raw_read_relax(lock) cpu_relax()
+#define _raw_write_relax(lock) cpu_relax()
+
#endif /* _ASM_M32R_SPINLOCK_H */