Merge tag 'remove-local-timers' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm into next/cleanup

From Stephen Boyd:

Now that we have a generic arch hook for broadcast we can remove the
local timer API entirely. Doing so will reduce code in ARM core, reduce
the architecture dependencies of our timer drivers, and simplify the code
because we no longer go through an architecture layer that is essentially
a hotplug notifier.

* tag 'remove-local-timers' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm:
  ARM: smp: Remove local timer API
  clocksource: time-armada-370-xp: Divorce from local timer API
  clocksource: time-armada-370-xp: Fix sparse warning
  ARM: msm: Divorce msm_timer from local timer API
  ARM: PRIMA2: Divorce timer-marco from local timer API
  ARM: EXYNOS4: Divorce mct from local timer API
  ARM: OMAP2+: Divorce from local timer API
  ARM: smp_twd: Divorce smp_twd from local timer API
  ARM: smp: Remove duplicate dummy timer implementation

Resolved a large number of conflicts due to __cpuinit cleanups, etc.

Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 42 insertions, 16 deletions

diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
index b2bbc415f120..5b34768f4d7c 100644
--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c
@@ -16,6 +16,7 @@
 #include <linux/err.h>
 #include <linux/clk.h>
 #include <linux/clockchips.h>
+#include <linux/cpu.h>
 #include <linux/platform_device.h>
 #include <linux/delay.h>
 #include <linux/percpu.h>
@@ -24,7 +25,6 @@
 #include <linux/of_address.h>
 #include <linux/clocksource.h>
 
-#include <asm/localtimer.h>
 #include <asm/mach/time.h>
 
 #define EXYNOS4_MCTREG(x)               (x)
@@ -80,7 +80,7 @@ static unsigned int mct_int_type;
 static int mct_irqs[MCT_NR_IRQS];
 
 struct mct_clock_event_device {
-        struct clock_event_device *evt;
+        struct clock_event_device evt;
         unsigned long base;
         char name[10];
 };
@@ -295,8 +295,6 @@ static void exynos4_clockevent_init(void)
         setup_irq(mct_irqs[MCT_G0_IRQ], &mct_comp_event_irq);
 }
 
-#ifdef CONFIG_LOCAL_TIMERS
-
 static DEFINE_PER_CPU(struct mct_clock_event_device, percpu_mct_tick);
 
 /* Clock event handling */
@@ -369,7 +367,7 @@ static inline void exynos4_tick_set_mode(enum clock_event_mode mode,
 
 static int exynos4_mct_tick_clear(struct mct_clock_event_device *mevt)
 {
-        struct clock_event_device *evt = mevt->evt;
+        struct clock_event_device *evt = &mevt->evt;
 
         /*
          * This is for supporting oneshot mode.
@@ -391,7 +389,7 @@ static int exynos4_mct_tick_clear(struct mct_clock_event_device *mevt)
 static irqreturn_t exynos4_mct_tick_isr(int irq, void *dev_id)
 {
         struct mct_clock_event_device *mevt = dev_id;
-        struct clock_event_device *evt = mevt->evt;
+        struct clock_event_device *evt = &mevt->evt;
 
         exynos4_mct_tick_clear(mevt);
 
@@ -405,8 +403,7 @@ static int exynos4_local_timer_setup(struct clock_event_device *evt)
         struct mct_clock_event_device *mevt;
         unsigned int cpu = smp_processor_id();
 
-        mevt = this_cpu_ptr(&percpu_mct_tick);
-        mevt->evt = evt;
+        mevt = container_of(evt, struct mct_clock_event_device, evt);
 
         mevt->base = EXYNOS4_MCT_L_BASE(cpu);
         sprintf(mevt->name, "mct_tick%d", cpu);
@@ -448,14 +445,37 @@ static void exynos4_local_timer_stop(struct clock_event_device *evt)
                 disable_percpu_irq(mct_irqs[MCT_L0_IRQ]);
 }
 
-static struct local_timer_ops exynos4_mct_tick_ops = {
-        .setup  = exynos4_local_timer_setup,
-        .stop   = exynos4_local_timer_stop,
+static int exynos4_mct_cpu_notify(struct notifier_block *self,
+                                           unsigned long action, void *hcpu)
+{
+        struct mct_clock_event_device *mevt;
+
+        /*
+         * Grab cpu pointer in each case to avoid spurious
+         * preemptible warnings
+         */
+        switch (action & ~CPU_TASKS_FROZEN) {
+        case CPU_STARTING:
+                mevt = this_cpu_ptr(&percpu_mct_tick);
+                exynos4_local_timer_setup(&mevt->evt);
+                break;
+        case CPU_DYING:
+                mevt = this_cpu_ptr(&percpu_mct_tick);
+                exynos4_local_timer_stop(&mevt->evt);
+                break;
+        }
+
+        return NOTIFY_OK;
+}
+
+static struct notifier_block exynos4_mct_cpu_nb = {
+        .notifier_call = exynos4_mct_cpu_notify,
 };
-#endif /* CONFIG_LOCAL_TIMERS */
 
 static void __init exynos4_timer_resources(struct device_node *np, void __iomem *base)
 {
+        int err;
+        struct mct_clock_event_device *mevt = this_cpu_ptr(&percpu_mct_tick);
         struct clk *mct_clk, *tick_clk;
 
         tick_clk = np ? of_clk_get_by_name(np, "fin_pll") :
@@ -473,9 +493,7 @@ static void __init exynos4_timer_resources(struct device_node *np, void __iomem
         if (!reg_base)
                 panic("%s: unable to ioremap mct address space\n", __func__);
 
-#ifdef CONFIG_LOCAL_TIMERS
         if (mct_int_type == MCT_INT_PPI) {
-                int err;
 
                 err = request_percpu_irq(mct_irqs[MCT_L0_IRQ],
                                          exynos4_mct_tick_isr, "MCT",
@@ -484,8 +502,16 @@ static void __init exynos4_timer_resources(struct device_node *np, void __iomem
                      mct_irqs[MCT_L0_IRQ], err);
         }
 
-        local_timer_register(&exynos4_mct_tick_ops);
-#endif /* CONFIG_LOCAL_TIMERS */
+        err = register_cpu_notifier(&exynos4_mct_cpu_nb);
+        if (err)
+                goto out_irq;
+
+        /* Immediately configure the timer on the boot CPU */
+        exynos4_local_timer_setup(&mevt->evt);
+        return;
+
+out_irq:
+        free_percpu_irq(mct_irqs[MCT_L0_IRQ], &percpu_mct_tick);
 }
 
 void __init mct_init(void __iomem *base, int irq_g0, int irq_l0, int irq_l1)