--- zzzz-none-000/linux-3.10.107/arch/mips/kernel/irq.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/mips/kernel/irq.c	2021-02-04 17:41:59.000000000 +0000
@@ -21,59 +21,15 @@
 #include <linux/kallsyms.h>
 #include <linux/kgdb.h>
 #include <linux/ftrace.h>
-
 #include <linux/atomic.h>
 #include <asm/uaccess.h>
 
-#ifdef CONFIG_KGDB
-int kgdb_early_setup;
-#endif
-
-static unsigned long irq_map[NR_IRQS / BITS_PER_LONG];
-
-int allocate_irqno(void)
-{
-	int irq;
-
-again:
-	irq = find_first_zero_bit(irq_map, NR_IRQS);
-
-	if (irq >= NR_IRQS)
-		return -ENOSPC;
-
-	if (test_and_set_bit(irq, irq_map))
-		goto again;
-
-	return irq;
-}
-
-/*
- * Allocate the 16 legacy interrupts for i8259 devices.	 This happens early
- * in the kernel initialization so treating allocation failure as BUG() is
- * ok.
- */
-void __init alloc_legacy_irqno(void)
-{
-	int i;
-
-	for (i = 0; i <= 16; i++)
-		BUG_ON(test_and_set_bit(i, irq_map));
-}
-
-void free_irqno(unsigned int irq)
-{
-	smp_mb__before_clear_bit();
-	clear_bit(irq, irq_map);
-	smp_mb__after_clear_bit();
-}
-
 /*
  * 'what should we do if we get a hw irq event on an illegal vector'.
  * each architecture has to answer this themselves.
  */
 void ack_bad_irq(unsigned int irq)
 {
-	smtc_im_ack_irq(irq);
 	printk("unexpected IRQ # %d\n", irq);
 }
 
@@ -94,20 +50,10 @@
 {
 	int i;
 
-#ifdef CONFIG_KGDB
-	if (kgdb_early_setup)
-		return;
-#endif
-
 	for (i = 0; i < NR_IRQS; i++)
 		irq_set_noprobe(i);
 
 	arch_init_irq();
-
-#ifdef CONFIG_KGDB
-	if (!kgdb_early_setup)
-		kgdb_early_setup = 1;
-#endif
 }
 
 #ifdef CONFIG_DEBUG_STACKOVERFLOW
@@ -142,23 +88,7 @@
 {
 	irq_enter();
 	check_stack_overflow();
-	if (!smtc_handle_on_other_cpu(irq))
-		generic_handle_irq(irq);
-	irq_exit();
-}
-
-#ifdef CONFIG_MIPS_MT_SMTC_IRQAFF
-/*
- * To avoid inefficient and in some cases pathological re-checking of
- * IRQ affinity, we have this variant that skips the affinity check.
- */
-
-void __irq_entry do_IRQ_no_affinity(unsigned int irq)
-{
-	irq_enter();
-	smtc_im_backstop(irq);
 	generic_handle_irq(irq);
 	irq_exit();
 }
 
-#endif /* CONFIG_MIPS_MT_SMTC_IRQAFF */