linux-kernel - [PATCH AUTOSEL 6.1 11/17] LoongArch: Define ARCH_IRQ_INIT_FLAGS as IRQ

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Message-ID: <20240903192600.1108046-11-sashal@kernel.org>
Date: Tue,  3 Sep 2024 15:25:25 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Huacai Chen <chenhuacai@...ngson.cn>,
	Thomas Gleixner <tglx@...utronix.de>,
	Tianyang Zhang <zhangtianyang@...ngson.cn>,
	Sasha Levin <sashal@...nel.org>,
	chenhuacai@...nel.org,
	wangliupu@...ngson.cn,
	lvjianmin@...ngson.cn,
	maobibo@...ngson.cn,
	yangtiezhu@...ngson.cn,
	loongarch@...ts.linux.dev
Subject: [PATCH AUTOSEL 6.1 11/17] LoongArch: Define ARCH_IRQ_INIT_FLAGS as IRQ_NOPROBE

From: Huacai Chen <chenhuacai@...ngson.cn>

[ Upstream commit 274ea3563e5ab9f468c15bfb9d2492803a66d9be ]

Currently we call irq_set_noprobe() in a loop for all IRQs, but indeed
it only works for IRQs below NR_IRQS_LEGACY because at init_IRQ() only
legacy interrupts have been allocated.

Instead, we can define ARCH_IRQ_INIT_FLAGS as IRQ_NOPROBE in asm/hwirq.h
and the core will automatically set the flag for all interrupts.

Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Huacai Chen <chenhuacai@...ngson.cn>
Signed-off-by: Tianyang Zhang <zhangtianyang@...ngson.cn>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/loongarch/include/asm/hw_irq.h | 2 ++
 arch/loongarch/kernel/irq.c         | 3 ---
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/loongarch/include/asm/hw_irq.h b/arch/loongarch/include/asm/hw_irq.h
index af4f4e8fbd858..8156ffb674159 100644
--- a/arch/loongarch/include/asm/hw_irq.h
+++ b/arch/loongarch/include/asm/hw_irq.h
@@ -9,6 +9,8 @@
 
 extern atomic_t irq_err_count;
 
+#define ARCH_IRQ_INIT_FLAGS	IRQ_NOPROBE
+
 /*
  * interrupt-retrigger: NOP for now. This may not be appropriate for all
  * machines, we'll see ...
diff --git a/arch/loongarch/kernel/irq.c b/arch/loongarch/kernel/irq.c
index 0524bf1169b74..4496649c9e68b 100644
--- a/arch/loongarch/kernel/irq.c
+++ b/arch/loongarch/kernel/irq.c
@@ -122,9 +122,6 @@ void __init init_IRQ(void)
 		panic("IPI IRQ request failed\n");
 #endif
 
-	for (i = 0; i < NR_IRQS; i++)
-		irq_set_noprobe(i);
-
 	for_each_possible_cpu(i) {
 		page = alloc_pages_node(cpu_to_node(i), GFP_KERNEL, order);
 
-- 
2.43.0