patch-2.3.18 linux/include/asm-m68k/spinlock.h

• Lines: 74
• Date: Wed Sep 8 12:01:38 1999
• Orig file: v2.3.17/linux/include/asm-m68k/spinlock.h
• Orig date: Mon Aug 9 12:27:31 1999

diff -u --recursive --new-file v2.3.17/linux/include/asm-m68k/spinlock.h linux/include/asm-m68k/spinlock.h
@@ -1,72 +1,6 @@
 #ifndef __M68K_SPINLOCK_H
 #define __M68K_SPINLOCK_H
 
-/*
- * We don't do SMP on the m68k .... at least not yet.
- */
-
-/*
- * Gcc-2.7.x has a nasty bug with empty initializers.
- */
-#if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)
-typedef struct { } spinlock_t;
-#define SPIN_LOCK_UNLOCKED (spinlock_t) { }
-#else
-typedef struct { int gcc_is_buggy; } spinlock_t;
-#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 }
-#endif
-
-#define spin_lock_init(lock)	do { } while(0)
-#define spin_lock(lock)		(void)(lock) /* Not "unused variable". */
-#define spin_trylock(lock)	(1)
-#define spin_unlock_wait(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_bh(lock)	local_bh_disable()
-#define spin_unlock_bh(lock)	local_bh_enable()
-
-#define spin_lock_irqsave(lock, flags) \
-	do { save_flags(flags); cli(); } while (0)
-#define spin_unlock_irqrestore(lock, flags) \
-	restore_flags(flags)
-
-/*
- * Read-write spinlocks, allowing multiple readers
- * but only one writer.
- *
- * NOTE! it is quite common to have readers in interrupts
- * but no interrupt writers. For those circumstances we
- * can "mix" irq-safe locks - any writer needs to get a
- * irq-safe write-lock, but readers can get non-irqsafe
- * read-locks.
- *
- * Gcc-2.7.x has a nasty bug with empty initializers.
- */
-#if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)
-typedef struct { } rwlock_t;
-#define RW_LOCK_UNLOCKED (rwlock_t) { }
-#else
-typedef struct { int gcc_is_buggy; } rwlock_t;
-#define RW_LOCK_UNLOCKED (rwlock_t) { 0 }
-#endif
-
-#define read_lock(lock)		(void)(lock) /* Not "unused variable". */
-#define read_unlock(lock)	do { } while(0)
-#define write_lock(lock)	(void)(lock) /* Not "unused variable". */
-#define write_unlock(lock)	do { } while(0)
-#define read_lock_irq(lock)	cli()
-#define read_unlock_irq(lock)	sti()
-#define write_lock_irq(lock)	cli()
-#define write_unlock_irq(lock)	sti()
-#define read_lock_bh(lock)	local_bh_disable()
-#define read_unlock_bh(lock)	local_bh_enable()
-#define write_lock_bh(lock)	local_bh_disable()
-#define write_unlock_bh(lock)	local_bh_enable()
-
-#define read_lock_irqsave(lock, flags)		save_and_cli(flags)
-#define read_unlock_irqrestore(lock, flags)	restore_flags(flags)
-#define write_lock_irqsave(lock, flags)		save_and_cli(flags)
-#define write_unlock_irqrestore(lock, flags)	restore_flags(flags)
+#error "m68k doesn't do SMP"
 
 #endif