patch-2.3.45 linux/include/asm-ia64/softirq.h

• Lines: 155
• Date: Sun Feb 13 10:31:07 2000
• Orig file: v2.3.44/linux/include/asm-ia64/softirq.h
• Orig date: Thu Feb 10 17:11:20 2000

diff -u --recursive --new-file v2.3.44/linux/include/asm-ia64/softirq.h linux/include/asm-ia64/softirq.h
@@ -2,13 +2,9 @@
 #define _ASM_IA64_SOFTIRQ_H
 
 /*
- * Copyright (C) 1998, 1999 Hewlett-Packard Co
- * Copyright (C) 1998, 1999 David Mosberger-Tang <[email protected]>
+ * Copyright (C) 1998-2000 Hewlett-Packard Co
+ * Copyright (C) 1998-2000 David Mosberger-Tang <[email protected]>
  */
-#include <linux/config.h>
-#include <linux/stddef.h>
-
-#include <asm/system.h>
 #include <asm/hardirq.h>
 
 extern unsigned int local_bh_count[NR_CPUS];
@@ -16,137 +12,9 @@
 #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)
-
-static inline void
-clear_active_bhs (unsigned long x)
-{
-	unsigned long old, new;
-	volatile unsigned long *bh_activep = (void *) &bh_active;
-	CMPXCHG_BUGCHECK_DECL
-
-	do {
-		CMPXCHG_BUGCHECK(bh_activep);
-		old = *bh_activep;
-		new = old & ~x;
-	} while (ia64_cmpxchg(bh_activep, old, new, 8) != old);
-}
-
-extern inline void
-init_bh (int nr, void (*routine)(void))
-{
-	bh_base[nr] = routine;
-	atomic_set(&bh_mask_count[nr], 0);
-	bh_mask |= 1 << nr;
-}
-
-extern inline void
-remove_bh (int nr)
-{
-	bh_mask &= ~(1 << nr);
-	mb();
-	bh_base[nr] = NULL;
-}
-
-extern inline void
-mark_bh (int nr)
-{
-	set_bit(nr, &bh_active);
-}
-
-#ifdef CONFIG_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 irq's 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 /* !CONFIG_SMP */
-
-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 /* !CONFIG_SMP */
-
-/*
- * These use a mask count to correctly handle
- * nested disable/enable calls
- */
-extern inline void
-disable_bh (int nr)
-{
-	bh_mask &= ~(1 << nr);
-	atomic_inc(&bh_mask_count[nr]);
-	synchronize_bh();
-}
-
-extern inline void
-enable_bh (int nr)
-{
-	if (atomic_dec_and_test(&bh_mask_count[nr]))
-		bh_mask |= 1 << nr;
-}
+#define in_softirq()		(local_bh_count[smp_processor_id()] != 0)
 
 #endif /* _ASM_IA64_SOFTIRQ_H */