1 files changed, 33 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 2f73f705d564..b5199752ac60 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -356,9 +356,42 @@ void __init init_IRQ(void)
 {
         if (ppc_md.init_IRQ)
                 ppc_md.init_IRQ();
+
+        exc_lvl_ctx_init();
+
         irq_ctx_init();
 }
 
+#if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
+struct thread_info   *critirq_ctx[NR_CPUS] __read_mostly;
+struct thread_info    *dbgirq_ctx[NR_CPUS] __read_mostly;
+struct thread_info *mcheckirq_ctx[NR_CPUS] __read_mostly;
+
+void exc_lvl_ctx_init(void)
+{
+        struct thread_info *tp;
+        int i;
+
+        for_each_possible_cpu(i) {
+                memset((void *)critirq_ctx[i], 0, THREAD_SIZE);
+                tp = critirq_ctx[i];
+                tp->cpu = i;
+                tp->preempt_count = 0;
+
+#ifdef CONFIG_BOOKE
+                memset((void *)dbgirq_ctx[i], 0, THREAD_SIZE);
+                tp = dbgirq_ctx[i];
+                tp->cpu = i;
+                tp->preempt_count = 0;
+
+                memset((void *)mcheckirq_ctx[i], 0, THREAD_SIZE);
+                tp = mcheckirq_ctx[i];
+                tp->cpu = i;
+                tp->preempt_count = HARDIRQ_OFFSET;
+#endif
+        }
+}
+#endif
 
 #ifdef CONFIG_IRQSTACKS
 struct thread_info *softirq_ctx[NR_CPUS] __read_mostly;