ppc64: move stack switching up in interrupt processing
This will make the ppc64 multiplatform irq handling more like
the generic handling.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
diff --git a/arch/ppc64/kernel/irq.c b/arch/ppc64/kernel/irq.c
index 8747458..b61497d 100644
--- a/arch/ppc64/kernel/irq.c
+++ b/arch/ppc64/kernel/irq.c
@@ -157,9 +157,6 @@
int cpu = smp_processor_id();
irq_desc_t *desc = get_irq_desc(irq);
irqreturn_t action_ret;
-#ifdef CONFIG_IRQSTACKS
- struct thread_info *curtp, *irqtp;
-#endif
kstat_cpu(cpu).irqs[irq]++;
@@ -227,20 +224,7 @@
for (;;) {
spin_unlock(&desc->lock);
-#ifdef CONFIG_IRQSTACKS
- /* Switch to the irq stack to handle this */
- curtp = current_thread_info();
- irqtp = hardirq_ctx[smp_processor_id()];
- if (curtp != irqtp) {
- irqtp->task = curtp->task;
- irqtp->flags = 0;
- action_ret = call_handle_IRQ_event(irq, regs, action, irqtp);
- irqtp->task = NULL;
- if (irqtp->flags)
- set_bits(irqtp->flags, &curtp->flags);
- } else
-#endif
- action_ret = handle_IRQ_event(irq, regs, action);
+ action_ret = handle_IRQ_event(irq, regs, action);
spin_lock(&desc->lock);
if (!noirqdebug)
@@ -310,6 +294,9 @@
void do_IRQ(struct pt_regs *regs)
{
int irq;
+#ifdef CONFIG_IRQSTACKS
+ struct thread_info *curtp, *irqtp;
+#endif
irq_enter();
@@ -330,9 +317,22 @@
irq = ppc_md.get_irq(regs);
- if (irq >= 0)
- ppc_irq_dispatch_handler(regs, irq);
- else
+ if (irq >= 0) {
+#ifdef CONFIG_IRQSTACKS
+ /* Switch to the irq stack to handle this */
+ curtp = current_thread_info();
+ irqtp = hardirq_ctx[smp_processor_id()];
+ if (curtp != irqtp) {
+ irqtp->task = curtp->task;
+ irqtp->flags = 0;
+ call_ppc_irq_dispatch_handler(regs, irq, irqtp);
+ irqtp->task = NULL;
+ if (irqtp->flags)
+ set_bits(irqtp->flags, &curtp->flags);
+ } else
+#endif
+ ppc_irq_dispatch_handler(regs, irq);
+ } else
/* That's not SMP safe ... but who cares ? */
ppc_spurious_interrupts++;
diff --git a/arch/ppc64/kernel/misc.S b/arch/ppc64/kernel/misc.S
index 914632e..d82a30d 100644
--- a/arch/ppc64/kernel/misc.S
+++ b/arch/ppc64/kernel/misc.S
@@ -78,12 +78,12 @@
mtlr r0
blr
-_GLOBAL(call_handle_IRQ_event)
+_GLOBAL(call_ppc_irq_dispatch_handler)
mflr r0
std r0,16(r1)
- stdu r1,THREAD_SIZE-112(r6)
- mr r1,r6
- bl .handle_IRQ_event
+ stdu r1,THREAD_SIZE-112(r5)
+ mr r1,r5
+ bl .ppc_irq_dispatch_handler
ld r1,0(r1)
ld r0,16(r1)
mtlr r0
