Merge branch 'arm/clock-event' of git://git.pengutronix.de/git/ukl/linux-2.6 into devel-stable

5 files changed, 15 insertions, 43 deletions

diff --git a/arch/arm/mach-at91/at91rm9200_time.c b/arch/arm/mach-at91/at91rm9200_time.c
index 309f3511aa2..2500f41d8d2 100644
--- a/arch/arm/mach-at91/at91rm9200_time.c
+++ b/arch/arm/mach-at91/at91rm9200_time.c
@@ -58,6 +58,12 @@ static irqreturn_t at91rm9200_timer_interrupt(int irq, void *dev_id)
 {
 	u32	sr = at91_sys_read(AT91_ST_SR) & irqmask;
 
+	/*
+	 * irqs should be disabled here, but as the irq is shared they are only
+	 * guaranteed to be off if the timer irq is registered first.
+	 */
+	WARN_ON_ONCE(!irqs_disabled());
+
 	/* simulate "oneshot" timer with alarm */
 	if (sr & AT91_ST_ALMS) {
 		clkevt.event_handler(&clkevt);
@@ -132,24 +138,11 @@ clkevt32k_mode(enum clock_event_mode mode, struct clock_event_device *dev)
 static int
 clkevt32k_next_event(unsigned long delta, struct clock_event_device *dev)
 {
-	unsigned long	flags;
 	u32		alm;
 	int		status = 0;
 
 	BUG_ON(delta < 2);
 
-	/* Use "raw" primitives so we behave correctly on RT kernels. */
-	raw_local_irq_save(flags);
-
-	/*
-	 * According to Thomas Gleixner irqs are already disabled here.  Simply
-	 * removing raw_local_irq_save above (and the matching
-	 * raw_local_irq_restore) was not accepted.  See
-	 * http://thread.gmane.org/gmane.linux.ports.arm.kernel/41174
-	 * So for now (2008-11-20) just warn once if irqs were not disabled ...
-	 */
-	WARN_ON_ONCE(!raw_irqs_disabled_flags(flags));
-
 	/* The alarm IRQ uses absolute time (now+delta), not the relative
 	 * time (delta) in our calling convention.  Like all clockevents
 	 * using such "match" hardware, we have a race to defend against.
@@ -169,7 +162,6 @@ clkevt32k_next_event(unsigned long delta, struct clock_event_device *dev)
 	alm += delta;
 	at91_sys_write(AT91_ST_RTAR, alm);
 
-	raw_local_irq_restore(flags);
 	return status;
 }
 
diff --git a/arch/arm/mach-at91/at91sam926x_time.c b/arch/arm/mach-at91/at91sam926x_time.c
index 4bd56aee437..608a63240b6 100644
--- a/arch/arm/mach-at91/at91sam926x_time.c
+++ b/arch/arm/mach-at91/at91sam926x_time.c
@@ -62,16 +62,12 @@ static struct clocksource pit_clk = {
 static void
 pit_clkevt_mode(enum clock_event_mode mode, struct clock_event_device *dev)
 {
-	unsigned long	flags;
-
 	switch (mode) {
 	case CLOCK_EVT_MODE_PERIODIC:
-		/* update clocksource counter, then enable the IRQ */
-		raw_local_irq_save(flags);
+		/* update clocksource counter */
 		pit_cnt += pit_cycle * PIT_PICNT(at91_sys_read(AT91_PIT_PIVR));
 		at91_sys_write(AT91_PIT_MR, (pit_cycle - 1) | AT91_PIT_PITEN
 				| AT91_PIT_PITIEN);
-		raw_local_irq_restore(flags);
 		break;
 	case CLOCK_EVT_MODE_ONESHOT:
 		BUG();
@@ -100,6 +96,11 @@ static struct clock_event_device pit_clkevt = {
  */
 static irqreturn_t at91sam926x_pit_interrupt(int irq, void *dev_id)
 {
+	/*
+	 * irqs should be disabled here, but as the irq is shared they are only
+	 * guaranteed to be off if the timer irq is registered first.
+	 */
+	WARN_ON_ONCE(!irqs_disabled());
 
 	/* The PIT interrupt may be disabled, and is shared */
 	if ((pit_clkevt.mode == CLOCK_EVT_MODE_PERIODIC)
diff --git a/arch/arm/mach-pxa/time.c b/arch/arm/mach-pxa/time.c
index 750c448db67..293e40aeaf2 100644
--- a/arch/arm/mach-pxa/time.c
+++ b/arch/arm/mach-pxa/time.c
@@ -76,14 +76,12 @@ pxa_ost0_interrupt(int irq, void *dev_id)
 static int
 pxa_osmr0_set_next_event(unsigned long delta, struct clock_event_device *dev)
 {
-	unsigned long flags, next, oscr;
+	unsigned long next, oscr;
 
-	raw_local_irq_save(flags);
 	OIER |= OIER_E0;
 	next = OSCR + delta;
 	OSMR0 = next;
 	oscr = OSCR;
-	raw_local_irq_restore(flags);
 
 	return (signed)(next - oscr) <= MIN_OSCR_DELTA ? -ETIME : 0;
 }
@@ -91,23 +89,17 @@ pxa_osmr0_set_next_event(unsigned long delta, struct clock_event_device *dev)
 static void
 pxa_osmr0_set_mode(enum clock_event_mode mode, struct clock_event_device *dev)
 {
-	unsigned long irqflags;
-
 	switch (mode) {
 	case CLOCK_EVT_MODE_ONESHOT:
-		raw_local_irq_save(irqflags);
 		OIER &= ~OIER_E0;
 		OSSR = OSSR_M0;
-		raw_local_irq_restore(irqflags);
 		break;
 
 	case CLOCK_EVT_MODE_UNUSED:
 	case CLOCK_EVT_MODE_SHUTDOWN:
 		/* initializing, released, or preparing for suspend */
-		raw_local_irq_save(irqflags);
 		OIER &= ~OIER_E0;
 		OSSR = OSSR_M0;
-		raw_local_irq_restore(irqflags);
 		break;
 
 	case CLOCK_EVT_MODE_RESUME:
diff --git a/arch/arm/mach-sa1100/time.c b/arch/arm/mach-sa1100/time.c
index b9cbb56d6e9..74b6e0e570b 100644
--- a/arch/arm/mach-sa1100/time.c
+++ b/arch/arm/mach-sa1100/time.c
@@ -35,14 +35,12 @@ static irqreturn_t sa1100_ost0_interrupt(int irq, void *dev_id)
 static int
 sa1100_osmr0_set_next_event(unsigned long delta, struct clock_event_device *c)
 {
-	unsigned long flags, next, oscr;
+	unsigned long next, oscr;
 
-	raw_local_irq_save(flags);
 	OIER |= OIER_E0;
 	next = OSCR + delta;
 	OSMR0 = next;
 	oscr = OSCR;
-	raw_local_irq_restore(flags);
 
 	return (signed)(next - oscr) <= MIN_OSCR_DELTA ? -ETIME : 0;
 }
@@ -50,16 +48,12 @@ sa1100_osmr0_set_next_event(unsigned long delta, struct clock_event_device *c)
 static void
 sa1100_osmr0_set_mode(enum clock_event_mode mode, struct clock_event_device *c)
 {
-	unsigned long flags;
-
 	switch (mode) {
 	case CLOCK_EVT_MODE_ONESHOT:
 	case CLOCK_EVT_MODE_UNUSED:
 	case CLOCK_EVT_MODE_SHUTDOWN:
-		raw_local_irq_save(flags);
 		OIER &= ~OIER_E0;
 		OSSR = OSSR_M0;
-		raw_local_irq_restore(flags);
 		break;
 
 	case CLOCK_EVT_MODE_RESUME:
diff --git a/arch/arm/plat-nomadik/timer.c b/arch/arm/plat-nomadik/timer.c
index 62f18ad43a2..fa7cb3a57cb 100644
--- a/arch/arm/plat-nomadik/timer.c
+++ b/arch/arm/plat-nomadik/timer.c
@@ -49,24 +49,17 @@ static struct clocksource nmdk_clksrc = {
 static void nmdk_clkevt_mode(enum clock_event_mode mode,
 			     struct clock_event_device *dev)
 {
-	unsigned long flags;
-
 	switch (mode) {
 	case CLOCK_EVT_MODE_PERIODIC:
-		/* enable interrupts -- and count current value? */
-		raw_local_irq_save(flags);
+		/* count current value? */
 		writel(readl(mtu_base + MTU_IMSC) | 1, mtu_base + MTU_IMSC);
-		raw_local_irq_restore(flags);
 		break;
 	case CLOCK_EVT_MODE_ONESHOT:
 		BUG(); /* Not supported, yet */
 		/* FALLTHROUGH */
 	case CLOCK_EVT_MODE_SHUTDOWN:
 	case CLOCK_EVT_MODE_UNUSED:
-		/* disable irq */
-		raw_local_irq_save(flags);
 		writel(readl(mtu_base + MTU_IMSC) & ~1, mtu_base + MTU_IMSC);
-		raw_local_irq_restore(flags);
 		break;
 	case CLOCK_EVT_MODE_RESUME:
 		break;