um/time: Migrate to new 'set-state' interface

Migrate um driver to the new 'set-state' interface provided by
clockevents core, the earlier 'set-mode' interface is marked obsolete
now.

This also enables us to implement callbacks for new states of clockevent
devices, for example: ONESHOT_STOPPED.

Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: user-mode-linux-devel@lists.sourceforge.net
Cc: user-mode-linux-user@lists.sourceforge.net
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

1 files changed, 20 insertions, 24 deletions

diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
index 117568d4f64a..5af441efb377 100644
--- a/arch/um/kernel/time.c
+++ b/arch/um/kernel/time.c
@@ -22,23 +22,16 @@ void timer_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs)
         local_irq_restore(flags);
 }
 
-static void itimer_set_mode(enum clock_event_mode mode,
-                            struct clock_event_device *evt)
+static int itimer_shutdown(struct clock_event_device *evt)
 {
-        switch (mode) {
-        case CLOCK_EVT_MODE_PERIODIC:
-                set_interval();
-                break;
-
-        case CLOCK_EVT_MODE_SHUTDOWN:
-        case CLOCK_EVT_MODE_UNUSED:
-        case CLOCK_EVT_MODE_ONESHOT:
-                disable_timer();
-                break;
-
-        case CLOCK_EVT_MODE_RESUME:
-                break;
-        }
+        disable_timer();
+        return 0;
+}
+
+static int itimer_set_periodic(struct clock_event_device *evt)
+{
+        set_interval();
+        return 0;
 }
 
 static int itimer_next_event(unsigned long delta,
@@ -48,14 +41,17 @@ static int itimer_next_event(unsigned long delta,
 }
 
 static struct clock_event_device itimer_clockevent = {
-        .name           = "itimer",
-        .rating         = 250,
-        .cpumask        = cpu_all_mask,
-        .features       = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
-        .set_mode       = itimer_set_mode,
-        .set_next_event = itimer_next_event,
-        .shift          = 32,
-        .irq            = 0,
+        .name                   = "itimer",
+        .rating                 = 250,
+        .cpumask                = cpu_all_mask,
+        .features               = CLOCK_EVT_FEAT_PERIODIC |
+                                  CLOCK_EVT_FEAT_ONESHOT,
+        .set_state_shutdown     = itimer_shutdown,
+        .set_state_periodic     = itimer_set_periodic,
+        .set_state_oneshot      = itimer_shutdown,
+        .set_next_event         = itimer_next_event,
+        .shift                  = 32,
+        .irq                    = 0,
 };
 
 static irqreturn_t um_timer(int irq, void *dev)