MIPS: Replace setup_irq() by request_irq()

request_irq() is preferred over setup_irq(). Invocations of setup_irq()
occur after memory allocators are ready.

Per tglx[1], setup_irq() existed in olden days when allocators were not
ready by the time early interrupts were initialized.

Hence replace setup_irq() by request_irq().

remove_irq() has been replaced by free_irq() as well.

There were build error's during previous version, couple of which was
reported by kbuild test robot <lkp@intel.com> of which one was reported
by Thomas Bogendoerfer <tsbogend@alpha.franken.de> as well. There were a
few more issues including build errors, those also have been fixed.

[1] https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos

Signed-off-by: afzal mohammed <afzal.mohd.ma@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

1 files changed, 12 insertions, 21 deletions

diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index f510c00bda88..d0e911f2421b 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -207,25 +207,13 @@ static irqreturn_t ipi_call_interrupt(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static struct irqaction irq_resched = {
-	.handler	= ipi_resched_interrupt,
-	.flags		= IRQF_PERCPU,
-	.name		= "IPI resched"
-};
-
-static struct irqaction irq_call = {
-	.handler	= ipi_call_interrupt,
-	.flags		= IRQF_PERCPU,
-	.name		= "IPI call"
-};
-
-static void smp_ipi_init_one(unsigned int virq,
-				    struct irqaction *action)
+static void smp_ipi_init_one(unsigned int virq, const char *name,
+			     irq_handler_t handler)
 {
 	int ret;
 
 	irq_set_handler(virq, handle_percpu_irq);
-	ret = setup_irq(virq, action);
+	ret = request_irq(virq, handler, IRQF_PERCPU, name, NULL);
 	BUG_ON(ret);
 }
 
@@ -278,12 +266,15 @@ int mips_smp_ipi_allocate(const struct cpumask *mask)
 		int cpu;
 
 		for_each_cpu(cpu, mask) {
-			smp_ipi_init_one(call_virq + cpu, &irq_call);
-			smp_ipi_init_one(sched_virq + cpu, &irq_resched);
+			smp_ipi_init_one(call_virq + cpu, "IPI call",
+					 ipi_call_interrupt);
+			smp_ipi_init_one(sched_virq + cpu, "IPI resched",
+					 ipi_resched_interrupt);
 		}
 	} else {
-		smp_ipi_init_one(call_virq, &irq_call);
-		smp_ipi_init_one(sched_virq, &irq_resched);
+		smp_ipi_init_one(call_virq, "IPI call", ipi_call_interrupt);
+		smp_ipi_init_one(sched_virq, "IPI resched",
+				 ipi_resched_interrupt);
 	}
 
 	return 0;
@@ -311,8 +302,8 @@ int mips_smp_ipi_free(const struct cpumask *mask)
 		int cpu;
 
 		for_each_cpu(cpu, mask) {
-			remove_irq(call_virq + cpu, &irq_call);
-			remove_irq(sched_virq + cpu, &irq_resched);
+			free_irq(call_virq + cpu, NULL);
+			free_irq(sched_virq + cpu, NULL);
 		}
 	}
 	irq_destroy_ipi(call_virq, mask);