add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/hexagon/kernel/smp.c
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@@ -1,21 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * SMP support for Hexagon
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  *
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  * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 and
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- * only version 2 as published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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- * 02110-1301, USA.
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  */
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 #include <linux/err.h>
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@@ -127,12 +114,6 @@
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 	local_irq_restore(flags);
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 }
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-static struct irqaction ipi_intdesc = {
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-	.handler = handle_ipi,
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-	.flags = IRQF_TRIGGER_RISING,
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-	.name = "ipi_handler"
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-};
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-
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 void __init smp_prepare_boot_cpu(void)
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 {
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 }
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@@ -145,8 +126,8 @@
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 void start_secondary(void)
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 {
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-	unsigned int cpu;
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 	unsigned long thread_ptr;
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+	unsigned int cpu, irq;
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 	/*  Calculate thread_info pointer from stack pointer  */
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 	__asm__ __volatile__(
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@@ -168,7 +149,10 @@
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 	cpu = smp_processor_id();
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-	setup_irq(BASE_IPI_IRQ + cpu, &ipi_intdesc);
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+	irq = BASE_IPI_IRQ + cpu;
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+	if (request_irq(irq, handle_ipi, IRQF_TRIGGER_RISING, "ipi_handler",
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+			NULL))
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+		pr_err("Failed to request irq %u (ipi_handler)\n", irq);
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 	/*  Register the clock_event dummy  */
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 	setup_percpu_clockdev();
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@@ -214,7 +198,7 @@
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 void __init smp_prepare_cpus(unsigned int max_cpus)
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 {
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-	int i;
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+	int i, irq = BASE_IPI_IRQ;
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 	/*
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 	 * should eventually have some sort of machine
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@@ -226,8 +210,11 @@
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 		set_cpu_present(i, true);
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 	/*  Also need to register the interrupts for IPI  */
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-	if (max_cpus > 1)
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-		setup_irq(BASE_IPI_IRQ, &ipi_intdesc);
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+	if (max_cpus > 1) {
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+		if (request_irq(irq, handle_ipi, IRQF_TRIGGER_RISING,
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+				"ipi_handler", NULL))
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+			pr_err("Failed to request irq %d (ipi_handler)\n", irq);
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+	}
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 }
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 void smp_send_reschedule(int cpu)