[irqchip: irq/irqchip-next] irq: arc: avoid CONFIG_HANDLE_DOMAIN_IRQ

[irqchip-bot for Mark Rutland]

The following commit has been merged into the irq/irqchip-next branch of irqchip:

Commit-ID:     e54957fa3b3b374c63c66f60a8236dd95cf5e2be
Gitweb:        https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/e54957fa3b3b374c63c66f60a8236dd95cf5e2be
Author:        Mark Rutland <mark.rutland@xxxxxxx>
AuthorDate:    Tue, 19 Oct 2021 12:26:41 +01:00
Committer:     Mark Rutland <mark.rutland@xxxxxxx>
CommitterDate: Mon, 25 Oct 2021 10:05:28 +01:00

irq: arc: avoid CONFIG_HANDLE_DOMAIN_IRQ

In preparation for removing HANDLE_DOMAIN_IRQ, have arch/arc perform all
the necessary IRQ entry accounting in its entry code.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@xxxxxxx>
Reviewed-by: Marc Zyngier <maz@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Vineet Gupta <vgupta@xxxxxxxxxx>
---
 arch/arc/Kconfig      |  1 -
 arch/arc/kernel/irq.c | 10 +++++++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 3a5a80f..b4ae605 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -40,7 +40,6 @@ config ARC
 	select HAVE_KRETPROBES
 	select HAVE_MOD_ARCH_SPECIFIC
 	select HAVE_PERF_EVENTS
-	select HANDLE_DOMAIN_IRQ
 	select IRQ_DOMAIN
 	select MODULES_USE_ELF_RELA
 	select OF
diff --git a/arch/arc/kernel/irq.c b/arch/arc/kernel/irq.c
index ef909dd..dd09b58 100644
--- a/arch/arc/kernel/irq.c
+++ b/arch/arc/kernel/irq.c
@@ -6,6 +6,8 @@
 #include <linux/interrupt.h>
 #include <linux/irqchip.h>
 #include <asm/mach_desc.h>
+
+#include <asm/irq_regs.h>
 #include <asm/smp.h>
 
 /*
@@ -39,5 +41,11 @@ void __init init_IRQ(void)
  */
 void arch_do_IRQ(unsigned int hwirq, struct pt_regs *regs)
 {
-	handle_domain_irq(NULL, hwirq, regs);
+	struct pt_regs *old_regs;
+
+	irq_enter();
+	old_regs = set_irq_regs(regs);
+	generic_handle_domain_irq(NULL, hwirq);
+	set_irq_regs(old_regs);
+	irq_exit();
 }