patch-2.3.43 linux/include/asm-i386/softirq.h

• Lines: 135
• Date: Wed Feb 9 21:33:04 2000
• Orig file: v2.3.42/linux/include/asm-i386/softirq.h
• Orig date: Tue Aug 31 17:29:14 1999

diff -u --recursive --new-file v2.3.42/linux/include/asm-i386/softirq.h linux/include/asm-i386/softirq.h
@@ -9,133 +9,9 @@
 #define cpu_bh_disable(cpu)	do { local_bh_count[(cpu)]++; barrier(); } while (0)
 #define cpu_bh_enable(cpu)	do { barrier(); local_bh_count[(cpu)]--; } while (0)
 
-#define cpu_bh_trylock(cpu)	(local_bh_count[(cpu)] ? 0 : (local_bh_count[(cpu)] = 1))
-#define cpu_bh_endlock(cpu)	(local_bh_count[(cpu)] = 0)
-
 #define local_bh_disable()	cpu_bh_disable(smp_processor_id())
 #define local_bh_enable()	cpu_bh_enable(smp_processor_id())
 
-#define get_active_bhs()	(bh_mask & bh_active)
-#define clear_active_bhs(x)	atomic_clear_mask((x),&bh_active)
-
-extern spinlock_t i386_bh_lock;
-
-#ifdef __SMP__
-
-/*
- * The locking mechanism for base handlers, to prevent re-entrancy,
- * is entirely private to an implementation, it should not be
- * referenced at all outside of this file.
- */
-extern atomic_t global_bh_lock;
-extern atomic_t global_bh_count;
-
-extern void synchronize_bh(void);
-
-static inline void start_bh_atomic(void)
-{
-	atomic_inc(&global_bh_lock);
-	synchronize_bh();
-}
-
-static inline void end_bh_atomic(void)
-{
-	atomic_dec(&global_bh_lock);
-}
-
-/* These are for the IRQs testing the lock */
-static inline int softirq_trylock(int cpu)
-{
-	if (cpu_bh_trylock(cpu)) {
-		if (!test_and_set_bit(0,&global_bh_count)) {
-			if (atomic_read(&global_bh_lock) == 0)
-				return 1;
-			clear_bit(0,&global_bh_count);
-		}
-		cpu_bh_endlock(cpu);
-	}
-	return 0;
-}
-
-static inline void softirq_endlock(int cpu)
-{
-	cpu_bh_enable(cpu);
-	clear_bit(0,&global_bh_count);
-}
-
-#else
-
-extern inline void start_bh_atomic(void)
-{
-	local_bh_disable();
-	barrier();
-}
-
-extern inline void end_bh_atomic(void)
-{
-	barrier();
-	local_bh_enable();
-}
-
-/* These are for the irq's testing the lock */
-#define softirq_trylock(cpu)	(cpu_bh_trylock(cpu))
-#define softirq_endlock(cpu)	(cpu_bh_endlock(cpu))
-#define synchronize_bh()	barrier()
-
-#endif	/* SMP */
-
-extern inline void init_bh(int nr, void (*routine)(void))
-{
-	unsigned long flags;
-
-	bh_base[nr] = routine;
-	atomic_set(&bh_mask_count[nr], 0);
-
-	spin_lock_irqsave(&i386_bh_lock, flags);
-	bh_mask |= 1 << nr;
-	spin_unlock_irqrestore(&i386_bh_lock, flags);
-}
-
-extern inline void remove_bh(int nr)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&i386_bh_lock, flags);
-	bh_mask &= ~(1 << nr);
-	spin_unlock_irqrestore(&i386_bh_lock, flags);
-
-	synchronize_bh();
-	bh_base[nr] = NULL;
-}
-
-extern inline void mark_bh(int nr)
-{
-	set_bit(nr, &bh_active);
-}
-
-/*
- * These use a mask count to correctly handle
- * nested disable/enable calls
- */
-extern inline void disable_bh(int nr)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&i386_bh_lock, flags);
-	bh_mask &= ~(1 << nr);
-	atomic_inc(&bh_mask_count[nr]);
-	spin_unlock_irqrestore(&i386_bh_lock, flags);
-	synchronize_bh();
-}
-
-extern inline void enable_bh(int nr)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&i386_bh_lock, flags);
-	if (atomic_dec_and_test(&bh_mask_count[nr]))
-		bh_mask |= 1 << nr;
-	spin_unlock_irqrestore(&i386_bh_lock, flags);
-}
+#define in_softirq() (local_bh_count[smp_processor_id()] != 0)
 
 #endif	/* __ASM_SOFTIRQ_H */