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>

4 files changed, 30 insertions, 30 deletions

diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index ae1433da09b2..9d09f0ad6efe 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -89,12 +89,12 @@ _GLOBAL(call_do_softirq)
         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
diff --git a/arch/ppc64/kernel/irq.c b/arch/ppc64/kernel/irq.c
index 87474584033f..b61497d5be28 100644
--- a/arch/ppc64/kernel/irq.c
+++ b/arch/ppc64/kernel/irq.c
@@ -157,9 +157,6 @@ void ppc_irq_dispatch_handler(struct pt_regs *regs, int irq)
         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 @@ void ppc_irq_dispatch_handler(struct pt_regs *regs, int irq)
         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)
 void do_IRQ(struct pt_regs *regs)
 {
         int irq;
+#ifdef CONFIG_IRQSTACKS
+        struct thread_info *curtp, *irqtp;
+#endif
 
         irq_enter();
 
@@ -330,9 +317,22 @@ void do_IRQ(struct pt_regs *regs)
 
         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 914632ec587d..d82a30dc26f8 100644
--- a/arch/ppc64/kernel/misc.S
+++ b/arch/ppc64/kernel/misc.S
@@ -78,12 +78,12 @@ _GLOBAL(call_do_softirq)
         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
diff --git a/include/asm-powerpc/irq.h b/include/asm-powerpc/irq.h
index b3935ea28fff..2a768e096067 100644
--- a/include/asm-powerpc/irq.h
+++ b/include/asm-powerpc/irq.h
@@ -488,8 +488,8 @@ extern struct thread_info *softirq_ctx[NR_CPUS];
 
 extern void irq_ctx_init(void);
 extern void call_do_softirq(struct thread_info *tp);
-extern int call_handle_IRQ_event(int irq, struct pt_regs *regs,
-                        struct irqaction *action, struct thread_info *tp);
+extern int call_ppc_irq_dispatch_handler(struct pt_regs *regs, int irq,
+                struct thread_info *tp);
 
 #define __ARCH_HAS_DO_SOFTIRQ