1 files changed, 14 insertions, 1 deletions

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 292163f5b39a..4617b65d464d 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -310,8 +310,21 @@ void do_IRQ(struct pt_regs *regs)
                                 handler = &__do_IRQ;
                         irqtp->task = curtp->task;
                         irqtp->flags = 0;
+
+                        /* Copy the softirq bits in preempt_count so that the
+                         * softirq checks work in the hardirq context.
+                         */
+                        irqtp->preempt_count =
+                                (irqtp->preempt_count & ~SOFTIRQ_MASK) |
+                                (curtp->preempt_count & SOFTIRQ_MASK);
+
                         call_handle_irq(irq, desc, irqtp, handler);
                         irqtp->task = NULL;
+
+
+                        /* Set any flag that may have been set on the
+                         * alternate stack
+                         */
                         if (irqtp->flags)
                                 set_bits(irqtp->flags, &curtp->flags);
                 } else
@@ -357,7 +370,7 @@ void irq_ctx_init(void)
                 memset((void *)softirq_ctx[i], 0, THREAD_SIZE);
                 tp = softirq_ctx[i];
                 tp->cpu = i;
-                tp->preempt_count = SOFTIRQ_OFFSET;
+                tp->preempt_count = 0;
 
                 memset((void *)hardirq_ctx[i], 0, THREAD_SIZE);
                 tp = hardirq_ctx[i];