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

• Lines: 121
• Date: Sun Feb 13 10:47:01 2000
• Orig file: v2.3.44/linux/include/asm-ppc/softirq.h
• Orig date: Fri Sep 10 23:57:37 1999

diff -u --recursive --new-file v2.3.44/linux/include/asm-ppc/softirq.h linux/include/asm-ppc/softirq.h
@@ -4,116 +4,11 @@
 #include <asm/atomic.h>
 #include <asm/hardirq.h>
 
-#define get_active_bhs()	(bh_mask & bh_active)
-#define clear_active_bhs(x)	atomic_clear_mask((x),&bh_active)
+extern unsigned int local_bh_count[NR_CPUS];
 
-extern unsigned int ppc_local_bh_count[NR_CPUS];
+#define local_bh_disable()	do { local_bh_count[smp_processor_id()]++; barrier(); } while (0)
+#define local_bh_enable()	do { barrier(); local_bh_count[smp_processor_id()]--; } while (0)
 
-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);
-	wmb();
-	bh_base[nr] = 0;
-}
-
-extern inline void mark_bh(int nr)
-{
-	set_bit(nr, &bh_active);
-}
-
-#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 (ppc_local_bh_count[cpu] == 0) {
-		ppc_local_bh_count[cpu] = 1;
-		if (!test_and_set_bit(0,&global_bh_count)) {
-			mb();
-			if (atomic_read(&global_bh_lock) == 0)
-				return 1;
-			clear_bit(0,&global_bh_count);
-		}
-		ppc_local_bh_count[cpu] = 0;
-		mb();
-	}
-	return 0;
-}
-
-static inline void softirq_endlock(int cpu)
-{
-	mb();
-	ppc_local_bh_count[cpu]--;
-	clear_bit(0,&global_bh_count);
-}
-
-#else
-
-extern inline void start_bh_atomic(void)
-{
-	ppc_local_bh_count[smp_processor_id()]++;
-	barrier();
-}
-
-extern inline void end_bh_atomic(void)
-{
-	barrier();
-	ppc_local_bh_count[smp_processor_id()]--;
-}
-
-/* These are for the irq's testing the lock */
-#define softirq_trylock(cpu)	(ppc_local_bh_count[cpu] ? 0 : (ppc_local_bh_count[cpu]=1))
-#define softirq_endlock(cpu)	(ppc_local_bh_count[cpu] = 0)
-#define synchronize_bh()	barrier()
-
-#endif	/* SMP */
-
-#define local_bh_disable()	(ppc_local_bh_count[smp_processor_id()]++)
-#define local_bh_enable()	(ppc_local_bh_count[smp_processor_id()]--)
-
-/*
- * 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_SOFTIRQ_H */