2 files changed, 23 insertions, 1 deletions

diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c
index 30ead135ff5f..e59bbd496c39 100644
--- a/arch/arm/kernel/machine_kexec.c
+++ b/arch/arm/kernel/machine_kexec.c
@@ -75,6 +75,11 @@ void machine_crash_shutdown(struct pt_regs *regs)
         printk(KERN_INFO "Loading crashdump kernel...\n");
 }
 
+/*
+ * Function pointer to optional machine-specific reinitialization
+ */
+void (*kexec_reinit)(void);
+
 void machine_kexec(struct kimage *image)
 {
         unsigned long page_list;
@@ -104,6 +109,8 @@ void machine_kexec(struct kimage *image)
                            (unsigned long) reboot_code_buffer + KEXEC_CONTROL_PAGE_SIZE);
         printk(KERN_INFO "Bye!\n");
 
+        if (kexec_reinit)
+                kexec_reinit();
         local_irq_disable();
         local_fiq_disable();
         setup_mm_for_reboot(0); /* mode is not used, so just pass 0*/
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index d150ad1ccb5d..22e194eb8536 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -377,9 +377,18 @@ validate_group(struct perf_event *event)
         return 0;
 }
 
+static irqreturn_t armpmu_platform_irq(int irq, void *dev)
+{
+        struct arm_pmu_platdata *plat = dev_get_platdata(&pmu_device->dev);
+
+        return plat->handle_irq(irq, dev, armpmu->handle_irq);
+}
+
 static int
 armpmu_reserve_hardware(void)
 {
+        struct arm_pmu_platdata *plat;
+        irq_handler_t handle_irq;
         int i, err = -ENODEV, irq;
 
         pmu_device = reserve_pmu(ARM_PMU_DEVICE_CPU);
@@ -390,6 +399,12 @@ armpmu_reserve_hardware(void)
 
         init_pmu(ARM_PMU_DEVICE_CPU);
 
+        plat = dev_get_platdata(&pmu_device->dev);
+        if (plat && plat->handle_irq)
+                handle_irq = armpmu_platform_irq;
+        else
+                handle_irq = armpmu->handle_irq;
+
         if (pmu_device->num_resources < 1) {
                 pr_err("no irqs for PMUs defined\n");
                 return -ENODEV;
@@ -400,7 +415,7 @@ armpmu_reserve_hardware(void)
                 if (irq < 0)
                         continue;
 
-                err = request_irq(irq, armpmu->handle_irq,
+                err = request_irq(irq, handle_irq,
                                   IRQF_DISABLED | IRQF_NOBALANCING,
                                   "armpmu", NULL);
                 if (err) {