patch-2.3.18 linux/include/asm-i386/spinlock.h

• Lines: 130
• Date: Wed Sep 8 12:01:38 1999
• Orig file: v2.3.17/linux/include/asm-i386/spinlock.h
• Orig date: Wed Aug 18 16:43:28 1999

diff -u --recursive --new-file v2.3.17/linux/include/asm-i386/spinlock.h linux/include/asm-i386/spinlock.h
@@ -2,122 +2,7 @@
 #define __ASM_SPINLOCK_H
 
 /*
- * These are the generic versions of the spinlocks
- * and read-write locks.. We should actually do a
- * <linux/spinlock.h> with all of this. Oh, well.
- */
-#define spin_lock_irqsave(lock, flags)		do { local_irq_save(flags);       spin_lock(lock); } while (0)
-#define spin_lock_irq(lock)			do { local_irq_disable();         spin_lock(lock); } while (0)
-#define spin_lock_bh(lock)			do { local_bh_disable();          spin_lock(lock); } while (0)
-
-#define read_lock_irqsave(lock, flags)		do { local_irq_save(flags);       read_lock(lock); } while (0)
-#define read_lock_irq(lock)			do { local_irq_disable();         read_lock(lock); } while (0)
-#define read_lock_bh(lock)			do { local_bh_disable();          read_lock(lock); } while (0)
-
-#define write_lock_irqsave(lock, flags)		do { local_irq_save(flags);      write_lock(lock); } while (0)
-#define write_lock_irq(lock)			do { local_irq_disable();        write_lock(lock); } while (0)
-#define write_lock_bh(lock)			do { local_bh_disable();         write_lock(lock); } while (0)
-
-#define spin_unlock_irqrestore(lock, flags)	do { spin_unlock(lock);  local_irq_restore(flags); } while (0)
-#define spin_unlock_irq(lock)			do { spin_unlock(lock);  local_irq_enable();       } while (0)
-#define spin_unlock_bh(lock)			do { spin_unlock(lock);  local_bh_enable();        } while (0)
-
-#define read_unlock_irqrestore(lock, flags)	do { read_unlock(lock);  local_irq_restore(flags); } while (0)
-#define read_unlock_irq(lock)			do { read_unlock(lock);  local_irq_enable();       } while (0)
-#define read_unlock_bh(lock)			do { read_unlock(lock);  local_bh_enable();        } while (0)
-
-#define write_unlock_irqrestore(lock, flags)	do { write_unlock(lock); local_irq_restore(flags); } while (0)
-#define write_unlock_irq(lock)			do { write_unlock(lock); local_irq_enable();       } while (0)
-#define write_unlock_bh(lock)			do { write_unlock(lock); local_bh_enable();        } while (0)
-
-#ifndef __SMP__
-
-#define DEBUG_SPINLOCKS	0	/* 0 == no debugging, 1 == maintain lock state, 2 == full debug */
-
-#if (DEBUG_SPINLOCKS < 1)
-
-/*
- * Your basic spinlocks, allowing only a single CPU anywhere
- *
- * 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)
-
-#elif (DEBUG_SPINLOCKS < 2)
-
-typedef struct {
-	volatile unsigned int lock;
-} spinlock_t;
-#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 }
-
-#define spin_lock_init(x)	do { (x)->lock = 0; } while (0)
-#define spin_trylock(lock)	(!test_and_set_bit(0,(lock)))
-
-#define spin_lock(x)		do { (x)->lock = 1; } while (0)
-#define spin_unlock_wait(x)	do { } while (0)
-#define spin_unlock(x)		do { (x)->lock = 0; } while (0)
-
-#else /* (DEBUG_SPINLOCKS >= 2) */
-
-typedef struct {
-	volatile unsigned int lock;
-	volatile unsigned int babble;
-	const char *module;
-} spinlock_t;
-#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0, 25, __BASE_FILE__ }
-
-#include <linux/kernel.h>
-
-#define spin_lock_init(x)	do { (x)->lock = 0; } while (0)
-#define spin_trylock(lock)	(!test_and_set_bit(0,(lock)))
-
-#define spin_lock(x)		do {unsigned long __spinflags; save_flags(__spinflags); cli(); if ((x)->lock&&(x)->babble) {printk("%s:%d: spin_lock(%s:%p) already locked\n", __BASE_FILE__,__LINE__, (x)->module, (x));(x)->babble--;} (x)->lock = 1; restore_flags(__spinflags);} while (0)
-#define spin_unlock_wait(x)	do {unsigned long __spinflags; save_flags(__spinflags); cli(); if ((x)->lock&&(x)->babble) {printk("%s:%d: spin_unlock_wait(%s:%p) deadlock\n", __BASE_FILE__,__LINE__, (x)->module, (x));(x)->babble--;} restore_flags(__spinflags);} while (0)
-#define spin_unlock(x)		do {unsigned long __spinflags; save_flags(__spinflags); cli(); if (!(x)->lock&&(x)->babble) {printk("%s:%d: spin_unlock(%s:%p) not locked\n", __BASE_FILE__,__LINE__, (x)->module, (x));(x)->babble--;} (x)->lock = 0; restore_flags(__spinflags);} while (0)
-
-#endif	/* DEBUG_SPINLOCKS */
-
-/*
- * 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)
-
-#else	/* __SMP__ */
-
-/*
- * Your basic spinlocks, allowing only a single CPU anywhere
+ * Your basic SMP spinlocks, allowing only a single CPU anywhere
  */
 
 typedef struct {
@@ -221,5 +106,4 @@
 #define write_unlock(rw) \
 	asm volatile("lock ; btrl $31,%0":"=m" (__dummy_lock(&(rw)->lock)))
 
-#endif /* __SMP__ */
 #endif /* __ASM_SPINLOCK_H */