disable cpu isolcpus

hc

2023-12-09 958e46acc8e900e8569dd467c1af9b8d2d019394

 kernel/arch/powerpc/platforms/powermac/pic.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  *  Support for the interrupt controllers found on Power Macintosh,
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  *  currently Apple's "Grand Central" interrupt controller in all
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@@ -7,12 +8,6 @@
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  *  Copyright (C) 1997 Paul Mackerras (paulus@samba.org)
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  *  Copyright (C) 2005 Benjamin Herrenschmidt (benh@kernel.crashing.org)
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  *                     IBM, Corp.
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- *
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- *  This program is free software; you can redistribute it and/or
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- *  modify it under the terms of the GNU General Public License
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- *  as published by the Free Software Foundation; either version
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- *  2 of the License, or (at your option) any later version.
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- *
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  */
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12
 
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 #include <linux/stddef.h>
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@@ -255,20 +250,6 @@
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 	return irq_linear_revmap(pmac_pic_host, irq);
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 }
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-#ifdef CONFIG_XMON
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-static struct irqaction xmon_action = {
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-	.handler	= xmon_irq,
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-	.flags		= IRQF_NO_THREAD,
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-	.name		= "NMI - XMON"
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-};
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-#endif
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-
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-static struct irqaction gatwick_cascade_action = {
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-	.handler	= gatwick_action,
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-	.flags		= IRQF_NO_THREAD,
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-	.name		= "cascade",
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-};
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-
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 static int pmac_pic_host_match(struct irq_domain *h, struct device_node *node,
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 			       enum irq_domain_bus_token bus_token)
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 {
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@@ -389,12 +370,17 @@
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 		out_le32(&pmac_irq_hw[i]->enable, 0);
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 	/* Hookup cascade irq */
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-	if (slave && pmac_irq_cascade)
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-		setup_irq(pmac_irq_cascade, &gatwick_cascade_action);
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+	if (slave && pmac_irq_cascade) {
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+		if (request_irq(pmac_irq_cascade, gatwick_action,
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+				IRQF_NO_THREAD, "cascade", NULL))
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+			pr_err("Failed to register cascade interrupt\n");
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+	}
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378
 
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 	printk(KERN_INFO "irq: System has %d possible interrupts\n", max_irqs);
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 #ifdef CONFIG_XMON
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-	setup_irq(irq_create_mapping(NULL, 20), &xmon_action);
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+	i = irq_create_mapping(NULL, 20);
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+	if (request_irq(i, xmon_irq, IRQF_NO_THREAD, "NMI - XMON", NULL))
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+		pr_err("Failed to register NMI-XMON interrupt\n");
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 #endif
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 }
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@@ -417,7 +403,7 @@
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 		if (ints != NULL)
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 			break;
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 		device = device->parent;
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-		if (device && strcmp(device->type, "pci") != 0)
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+		if (!of_node_is_type(device, "pci"))
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 			break;
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 	}
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 	if (ints == NULL)
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@@ -446,7 +432,9 @@
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 		nmi_irq = irq_of_parse_and_map(pswitch, 0);
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 		if (nmi_irq) {
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 			mpic_irq_set_priority(nmi_irq, 9);
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-			setup_irq(nmi_irq, &xmon_action);
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+			if (request_irq(nmi_irq, xmon_irq, IRQF_NO_THREAD,
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+					"NMI - XMON", NULL))
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+				pr_err("Failed to register NMI-XMON interrupt\n");
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 		}
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 		of_node_put(pswitch);
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 	}
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@@ -553,13 +541,13 @@
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541
 
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 		for_each_node_with_property(np, "interrupt-controller") {
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 			/* Skip /chosen/interrupt-controller */
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-			if (strcmp(np->name, "chosen") == 0)
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+			if (of_node_name_eq(np, "chosen"))
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 				continue;
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 			/* It seems like at least one person wants
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 			 * to use BootX on a machine with an AppleKiwi
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 			 * controller which happens to pretend to be an
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 			 * interrupt controller too. */
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-			if (strcmp(np->name, "AppleKiwi") == 0)
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+			if (of_node_name_eq(np, "AppleKiwi"))
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 				continue;
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 			/* I think we found one ! */
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 			of_irq_dflt_pic = np;