---

yaml
---
r: 73316
b: refs/heads/master
c: 43875cc
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 465ccab9eb8209a2a402710b24a9bff127b25b94
+refs/heads/master: 43875cc0a54d936132010e58545269e183741fae

trunk/arch/powerpc/kernel/time.c

@@ -586,7 +586,7 @@ void timer_interrupt(struct pt_regs * regs)
 		/* not time for this event yet */
 		now = per_cpu(decrementer_next_tb, cpu) - now;
 		if (now <= DECREMENTER_MAX)
-			set_dec((unsigned int)now - 1);
+			set_dec((int)now);
 		return;
 	}
 	old_regs = set_irq_regs(regs);
@@ -611,8 +611,6 @@ void timer_interrupt(struct pt_regs * regs)
 
 	if (evt->event_handler)
 		evt->event_handler(evt);
-	else
-		evt->set_next_event(DECREMENTER_MAX, evt);
 
 #ifdef CONFIG_PPC_ISERIES
 	if (firmware_has_feature(FW_FEATURE_ISERIES) && hvlpevent_is_pending())
@@ -836,9 +834,6 @@ static int decrementer_set_next_event(unsigned long evt,
 				      struct clock_event_device *dev)
 {
 	__get_cpu_var(decrementer_next_tb) = get_tb_or_rtc() + evt;
-	/* The decrementer interrupts on the 0 -> -1 transition */
-	if (evt)
-		--evt;
 	set_dec(evt);
 	return 0;
 }
@@ -871,7 +866,8 @@ void init_decrementer_clockevent(void)
 					     decrementer_clockevent.shift);
 	decrementer_clockevent.max_delta_ns =
 		clockevent_delta2ns(DECREMENTER_MAX, &decrementer_clockevent);
-	decrementer_clockevent.min_delta_ns = 1000;
+	decrementer_clockevent.min_delta_ns =
+		clockevent_delta2ns(2, &decrementer_clockevent);
 
 	register_decrementer_clockevent(cpu);
 }

trunk/include/asm-powerpc/time.h

@@ -176,25 +176,31 @@ static inline unsigned int get_dec(void)
 #endif
 }
 
+/*
+ * Note: Book E and 4xx processors differ from other PowerPC processors
+ * in when the decrementer generates its interrupt: on the 1 to 0
+ * transition for Book E/4xx, but on the 0 to -1 transition for others.
+ */
 static inline void set_dec(int val)
 {
 #if defined(CONFIG_40x)
 	mtspr(SPRN_PIT, val);
 #elif defined(CONFIG_8xx_CPU6)
-	set_dec_cpu6(val);
+	set_dec_cpu6(val - 1);
 #else
+#ifndef CONFIG_BOOKE
+	--val;
+#endif
 #ifdef CONFIG_PPC_ISERIES
-	int cur_dec;
-
 	if (firmware_has_feature(FW_FEATURE_ISERIES) &&
 			get_lppaca()->shared_proc) {
 		get_lppaca()->virtual_decr = val;
-		cur_dec = get_dec();
-		if (cur_dec > val)
+		if (get_dec() > val)
 			HvCall_setVirtualDecr();
-	} else
+		return;
+	}
 #endif
-		mtspr(SPRN_DEC, val);
+	mtspr(SPRN_DEC, val);
 #endif /* not 40x or 8xx_CPU6 */
 }