patch-2.3.49 linux/arch/alpha/kernel/irq_impl.h

• Lines: 60
• Date: Sun Feb 27 13:28:01 2000
• Orig file: v2.3.48/linux/arch/alpha/kernel/irq_impl.h
• Orig date: Sun Feb 20 21:12:38 2000

diff -u --recursive --new-file v2.3.48/linux/arch/alpha/kernel/irq_impl.h linux/arch/alpha/kernel/irq_impl.h
@@ -19,6 +19,7 @@
 extern void srm_device_interrupt(unsigned long, struct pt_regs *);
 extern void pyxis_device_interrupt(unsigned long, struct pt_regs *);
 
+extern struct irqaction timer_irqaction;
 extern struct irqaction isa_cascade_irqaction;
 extern struct irqaction timer_cascade_irqaction;
 extern struct irqaction halt_switch_irqaction;
@@ -33,27 +34,37 @@
 extern void i8259a_disable_irq(unsigned int);
 extern void i8259a_mask_and_ack_irq(unsigned int);
 extern unsigned int i8259a_startup_irq(unsigned int);
+extern void i8259a_end_irq(unsigned int);
 extern struct hw_interrupt_type i8259a_irq_type;
 extern void init_i8259a_irqs(void);
 
-extern void no_action(int cpl, void *dev_id, struct pt_regs *regs);
 extern void handle_irq(int irq, struct pt_regs * regs);
 
+extern unsigned long prof_cpu_mask;
+
 static inline void
 alpha_do_profile(unsigned long pc)
 {
-	if (prof_buffer && current->pid) {
-		extern char _stext;
+	extern char _stext;
+
+	if (!prof_buffer)
+		return;
 
-		pc -= (unsigned long) &_stext;
-		pc >>= prof_shift;
-		/*
-		 * Don't ignore out-of-bounds PC values silently,
-		 * put them into the last histogram slot, so if
-		 * present, they will show up as a sharp peak.
-		 */
-		if (pc > prof_len - 1)
-			pc = prof_len - 1;
-		atomic_inc((atomic_t *)&prof_buffer[pc]);
-	}
+	/*
+	 * Only measure the CPUs specified by /proc/irq/prof_cpu_mask.
+	 * (default is all CPUs.)
+	 */
+	if (!((1<<smp_processor_id()) & prof_cpu_mask))
+		return;
+
+	pc -= (unsigned long) &_stext;
+	pc >>= prof_shift;
+	/*
+	 * Don't ignore out-of-bounds PC values silently,
+	 * put them into the last histogram slot, so if
+	 * present, they will show up as a sharp peak.
+	 */
+	if (pc > prof_len - 1)
+		pc = prof_len - 1;
+	atomic_inc((atomic_t *)&prof_buffer[pc]);
 }