--- zzzz-none-000/linux-3.10.107/arch/mips/pmcs-msp71xx/msp_irq_per.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/mips/pmcs-msp71xx/msp_irq_per.c	2021-02-04 17:41:59.000000000 +0000
@@ -113,9 +113,6 @@
 	/* initialize all the IRQ descriptors */
 	for (i = MSP_PER_INTBASE; i < MSP_PER_INTBASE + 32; i++) {
 		irq_set_chip(i, &msp_per_irq_controller);
-#ifdef CONFIG_MIPS_MT_SMTC
-		irq_hwmask[i] = C_IRQ4;
-#endif
 	}
 }