+++ /dev/null
---- a/arch/mips/kernel/traps.c
-+++ b/arch/mips/kernel/traps.c
-@@ -1537,7 +1537,16 @@ void __cpuinit per_cpu_trap_init(void)
- */
- if (cpu_has_mips_r2) {
- cp0_compare_irq = (read_c0_intctl() >> 29) & 7;
-+ if (!cp0_compare_irq)
-+ cp0_compare_irq = CP0_LEGACY_COMPARE_IRQ;
-+
- cp0_perfcount_irq = (read_c0_intctl() >> 26) & 7;
-+ if (!cp0_perfcount_irq)
-+ cp0_perfcount_irq = CP0_LEGACY_PERFCNT_IRQ;
-+
-+ if (arch_fixup_c0_irqs)
-+ arch_fixup_c0_irqs();
-+
- if (cp0_perfcount_irq == cp0_compare_irq)
- cp0_perfcount_irq = -1;
- } else {
---- a/arch/mips/include/asm/irq.h
-+++ b/arch/mips/include/asm/irq.h
-@@ -158,8 +158,10 @@ extern void free_irqno(unsigned int irq)
- * IE7. Since R2 their number has to be read from the c0_intctl register.
- */
- #define CP0_LEGACY_COMPARE_IRQ 7
-+#define CP0_LEGACY_PERFCNT_IRQ 7
-
- extern int cp0_compare_irq;
- extern int cp0_perfcount_irq;
-+extern void __weak arch_fixup_c0_irqs(void);
-
- #endif /* _ASM_IRQ_H */