patch-2.1.34 linux/include/asm-sparc64/spinlock.h

• Lines: 33
• Date: Fri Apr 11 10:47:40 1997
• Orig file: v2.1.33/linux/include/asm-sparc64/spinlock.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.33/linux/include/asm-sparc64/spinlock.h linux/include/asm-sparc64/spinlock.h
@@ -0,0 +1,32 @@
+/* spinlock.h: 64-bit Sparc spinlock support.
+ *
+ * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#ifndef __SPARC64_SPINLOCK_H
+#define __SPARC64_SPINLOCK_H
+
+#ifndef __ASSEMBLY__
+
+#ifndef __SMP__
+
+typedef struct { } spinlock_t;
+#define SPIN_LOCK_UNLOCKED { }
+
+#define spin_lock_init(lock)	do { } while(0)
+#define spin_lock(lock)		do { } while(0)
+#define spin_trylock(lock)	do { } while(0)
+#define spin_unlock(lock)	do { } while(0)
+#define spin_lock_irq(lock)	cli()
+#define spin_unlock_irq(lock)	sti()
+
+#define spin_lock_irqsave(lock, flags)		save_and_cli(flags)
+#define spin_unlock_irqrestore(lock, flags)	restore_flags(flags)
+
+#else /* !(__SMP__) */
+#error SMP not supported on sparc64
+#endif /* __SMP__ */
+
+#endif /* !(__ASSEMBLY__) */
+
+#endif /* !(__SPARC64_SPINLOCK_H) */