IRQ: Maintain regs pointer globally rather than passing to IRQ handlers

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / powerpc / kernel / irq.c

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index c3f58f2f9f525d15fcb12466c6d7321218b2fc80..5deaab3090b45def3f7f29dba9da8df6296d37aa 100644 (file)
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -187,6 +187,7 @@ void fixup_irqs(cpumask_t map)
 
 void do_IRQ(struct pt_regs *regs)
 {
+       struct pt_regs *old_regs = set_irq_regs(regs);
        unsigned int irq;
 #ifdef CONFIG_IRQSTACKS
        struct thread_info *curtp, *irqtp;
@@ -230,18 +231,19 @@ void do_IRQ(struct pt_regs *regs)
                                handler = &__do_IRQ;
                        irqtp->task = curtp->task;
                        irqtp->flags = 0;
-                       call_handle_irq(irq, desc, regs, irqtp, handler);
+                       call_handle_irq(irq, desc, irqtp, handler);
                        irqtp->task = NULL;
                        if (irqtp->flags)
                                set_bits(irqtp->flags, &curtp->flags);
                } else
 #endif
-                       generic_handle_irq(irq, regs);
+                       generic_handle_irq(irq);
        } else if (irq != NO_IRQ_IGNORE)
                /* That's not SMP safe ... but who cares ? */
                ppc_spurious_interrupts++;
 
         irq_exit();
+       set_irq_regs(old_regs);
 
 #ifdef CONFIG_PPC_ISERIES
        if (get_lppaca()->int_dword.fields.decr_int) {