[Xen-devel] [PATCH 6/9] xen/time: Encapsulate the struct clock_event_device in another structure.

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

We don't do any code movement. We just encapsulate the struct clock_event_device
in a new structure which contains said structure and a pointer to
a char *name. The 'name' will be used in 'xen/time: Don't leak interrupt
name when offlining'.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
---
 arch/x86/xen/time.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index 3d88bfd..5190687 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -377,11 +377,16 @@ static const struct clock_event_device 
xen_vcpuop_clockevent = {
 
 static const struct clock_event_device *xen_clockevent =
        &xen_timerop_clockevent;
-static DEFINE_PER_CPU(struct clock_event_device, xen_clock_events) = { .irq = 
-1 };
+
+struct xen_clock_event_device {
+       struct clock_event_device evt;
+       char *name;
+};
+static DEFINE_PER_CPU(struct xen_clock_event_device, xen_clock_events) = { 
.evt.irq = -1 };
 
 static irqreturn_t xen_timer_interrupt(int irq, void *dev_id)
 {
-       struct clock_event_device *evt = &__get_cpu_var(xen_clock_events);
+       struct clock_event_device *evt = &__get_cpu_var(xen_clock_events).evt;
        irqreturn_t ret;
 
        ret = IRQ_NONE;
@@ -401,7 +406,7 @@ void xen_setup_timer(int cpu)
        struct clock_event_device *evt;
        int irq;
 
-       evt = &per_cpu(xen_clock_events, cpu);
+       evt = &per_cpu(xen_clock_events, cpu).evt;
        WARN(evt->irq >= 0, "IRQ%d for CPU%d is already allocated\n", evt->irq, 
cpu);
 
        printk(KERN_INFO "installing Xen timer for CPU %d\n", cpu);
@@ -426,7 +431,7 @@ void xen_teardown_timer(int cpu)
 {
        struct clock_event_device *evt;
        BUG_ON(cpu == 0);
-       evt = &per_cpu(xen_clock_events, cpu);
+       evt = &per_cpu(xen_clock_events, cpu).evt;
        unbind_from_irqhandler(evt->irq, NULL);
        evt->irq = -1;
 }
@@ -435,7 +440,7 @@ void xen_setup_cpu_clockevents(void)
 {
        BUG_ON(preemptible());
 
-       clockevents_register_device(&__get_cpu_var(xen_clock_events));
+       clockevents_register_device(&__get_cpu_var(xen_clock_events).evt);
 }
 
 void xen_timer_resume(void)
-- 
1.8.1.4


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