ARM: 9298/1: Drop custom mdesc->handle_irq()

ARM exclusively uses GENERIC_IRQ_MULTI_HANDLER, so at some point
set_handle_irq() needs to be called to handle system-wide
interrupts.

For all DT-enabled boards, this call happens down in the
drivers/irqchip subsystem, after locating the target irqchip
driver from the device tree.

We still have a few instances of the boardfiles with machine
descriptors passing a machine-specific .handle_irq() to the
ARM kernel core.

Get rid of this by letting the few remaining machines consistently
call set_handle_irq() from the end of the .init_irq() callback
instead and diet down one member from the machine descriptor.

Cc: Marc Zyngier <maz@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

arch/arm/include/asm/mach/arch.h

@@ -56,7 +56,6 @@ struct machine_desc {
 	void			(*init_time)(void);
 	void			(*init_machine)(void);
 	void			(*init_late)(void);
-	void			(*handle_irq)(struct pt_regs *);
 	void			(*restart)(enum reboot_mode, const char *);
 };
 

arch/arm/kernel/setup.c

@@ -1198,10 +1198,6 @@ void __init setup_arch(char **cmdline_p)
 
 	reserve_crashkernel();
 
-#ifdef CONFIG_GENERIC_IRQ_MULTI_HANDLER
-	handle_arch_irq = mdesc->handle_irq;
-#endif
-
 #ifdef CONFIG_VT
 #if defined(CONFIG_VGA_CONSOLE)
 	conswitchp = &vga_con;

arch/arm/mach-mxs/mach-mxs.c

@@ -11,7 +11,6 @@
 #include <linux/err.h>
 #include <linux/gpio.h>
 #include <linux/init.h>
-#include <linux/irqchip/mxs.h>
 #include <linux/reboot.h>
 #include <linux/micrel_phy.h>
 #include <linux/of_address.h>
@@ -472,7 +471,6 @@ static const char *const mxs_dt_compat[] __initconst = {
 };
 
 DT_MACHINE_START(MXS, "Freescale MXS (Device Tree)")
-	.handle_irq	= icoll_handle_irq,
 	.init_machine	= mxs_machine_init,
 	.init_late      = mxs_pm_init,
 	.dt_compat	= mxs_dt_compat,

arch/arm/mach-omap1/board-ams-delta.c

@@ -877,7 +877,6 @@ MACHINE_START(AMS_DELTA, "Amstrad E3 (Delta)")
 	.map_io		= ams_delta_map_io,
 	.init_early	= omap1_init_early,
 	.init_irq	= omap1_init_irq,
-	.handle_irq	= omap1_handle_irq,
 	.init_machine	= ams_delta_init,
 	.init_late	= ams_delta_init_late,
 	.init_time	= omap1_timer_init,

arch/arm/mach-omap1/board-nokia770.c

@@ -291,7 +291,6 @@ MACHINE_START(NOKIA770, "Nokia 770")
 	.map_io		= omap1_map_io,
 	.init_early     = omap1_init_early,
 	.init_irq	= omap1_init_irq,
-	.handle_irq	= omap1_handle_irq,
 	.init_machine	= omap_nokia770_init,
 	.init_late	= omap1_init_late,
 	.init_time	= omap1_timer_init,

arch/arm/mach-omap1/board-osk.c

@@ -389,7 +389,6 @@ MACHINE_START(OMAP_OSK, "TI-OSK")
 	.map_io		= omap1_map_io,
 	.init_early	= omap1_init_early,
 	.init_irq	= omap1_init_irq,
-	.handle_irq	= omap1_handle_irq,
 	.init_machine	= osk_init,
 	.init_late	= omap1_init_late,
 	.init_time	= omap1_timer_init,

arch/arm/mach-omap1/board-palmte.c

@@ -259,7 +259,6 @@ MACHINE_START(OMAP_PALMTE, "OMAP310 based Palm Tungsten E")
 	.map_io		= omap1_map_io,
 	.init_early     = omap1_init_early,
 	.init_irq	= omap1_init_irq,
-	.handle_irq	= omap1_handle_irq,
 	.init_machine	= omap_palmte_init,
 	.init_late	= omap1_init_late,
 	.init_time	= omap1_timer_init,

arch/arm/mach-omap1/board-sx1.c

@@ -338,7 +338,6 @@ MACHINE_START(SX1, "OMAP310 based Siemens SX1")
 	.map_io		= omap1_map_io,
 	.init_early     = omap1_init_early,
 	.init_irq	= omap1_init_irq,
-	.handle_irq	= omap1_handle_irq,
 	.init_machine	= omap_sx1_init,
 	.init_late	= omap1_init_late,
 	.init_time	= omap1_timer_init,

arch/arm/mach-omap1/irq.c

@@ -37,6 +37,7 @@
  */
 #include <linux/gpio.h>
 #include <linux/init.h>
+#include <linux/irq.h>
 #include <linux/module.h>
 #include <linux/sched.h>
 #include <linux/interrupt.h>
@@ -254,4 +255,6 @@ void __init omap1_init_irq(void)
 		ct = irq_data_get_chip_type(d);
 		ct->chip.irq_unmask(d);
 	}
+
+	set_handle_irq(omap1_handle_irq);
 }

arch/arm/mach-pxa/gumstix.c

@@ -233,7 +233,6 @@ MACHINE_START(GUMSTIX, "Gumstix")
 	.map_io		= pxa25x_map_io,
 	.nr_irqs	= PXA_NR_IRQS,
 	.init_irq	= pxa25x_init_irq,
-	.handle_irq	= pxa25x_handle_irq,
 	.init_time	= pxa_timer_init,
 	.init_machine	= gumstix_init,
 	.restart	= pxa_restart,

arch/arm/mach-pxa/pxa25x.c

@@ -143,6 +143,7 @@ static int pxa25x_set_wake(struct irq_data *d, unsigned int on)
 void __init pxa25x_init_irq(void)
 {
 	pxa_init_irq(32, pxa25x_set_wake);
+	set_handle_irq(pxa25x_handle_irq);
 }
 
 static int __init __init

arch/arm/mach-pxa/pxa27x.c

@@ -228,6 +228,7 @@ static int pxa27x_set_wake(struct irq_data *d, unsigned int on)
 void __init pxa27x_init_irq(void)
 {
 	pxa_init_irq(34, pxa27x_set_wake);
+	set_handle_irq(pxa27x_handle_irq);
 }
 
 static int __init

arch/arm/mach-pxa/spitz.c

@@ -1043,7 +1043,6 @@ MACHINE_START(SPITZ, "SHARP Spitz")
 	.map_io		= pxa27x_map_io,
 	.nr_irqs	= PXA_NR_IRQS,
 	.init_irq	= pxa27x_init_irq,
-	.handle_irq	= pxa27x_handle_irq,
 	.init_machine	= spitz_init,
 	.init_time	= pxa_timer_init,
 	.restart	= spitz_restart,
@@ -1056,7 +1055,6 @@ MACHINE_START(BORZOI, "SHARP Borzoi")
 	.map_io		= pxa27x_map_io,
 	.nr_irqs	= PXA_NR_IRQS,
 	.init_irq	= pxa27x_init_irq,
-	.handle_irq	= pxa27x_handle_irq,
 	.init_machine	= spitz_init,
 	.init_time	= pxa_timer_init,
 	.restart	= spitz_restart,
@@ -1069,7 +1067,6 @@ MACHINE_START(AKITA, "SHARP Akita")
 	.map_io		= pxa27x_map_io,
 	.nr_irqs	= PXA_NR_IRQS,
 	.init_irq	= pxa27x_init_irq,
-	.handle_irq	= pxa27x_handle_irq,
 	.init_machine	= spitz_init,
 	.init_time	= pxa_timer_init,
 	.restart	= spitz_restart,

drivers/irqchip/irq-mxs.c

@@ -201,6 +201,7 @@ static int __init icoll_of_init(struct device_node *np,
 	stmp_reset_block(icoll_priv.ctrl);
 
 	icoll_add_domain(np, ICOLL_NUM_IRQS);
+	set_handle_irq(icoll_handle_irq);
 
 	return 0;
 }

include/linux/irqchip/mxs.h

-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (C) 2013 Freescale Semiconductor, Inc.
- */
-
-#ifndef __LINUX_IRQCHIP_MXS_H
-#define __LINUX_IRQCHIP_MXS_H
-
-extern void icoll_handle_irq(struct pt_regs *);
-
-#endif