linux-kernel - [PATCH] genirq: Remove GENERIC_IRQ

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Message-ID: <20250814165949.hvtP03r4@linutronix.de>
Date: Thu, 14 Aug 2025 18:59:49 +0200
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: linux-kernel@...r.kernel.org
Cc: Thomas Gleixner <tglx@...utronix.de>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [PATCH] genirq: Remove GENERIC_IRQ_LEGACY

IA64 is gone and withit the last GENERIC_IRQ_LEGACY user.

Remove GENERIC_IRQ_LEGACY.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
---
 include/linux/irq.h  | 4 ----
 kernel/irq/Kconfig   | 4 ----
 kernel/irq/irqdesc.c | 7 -------
 3 files changed, 15 deletions(-)

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 1d6b606a81efe..c9bcdbf6bc635 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -976,10 +976,6 @@ static inline void irq_free_desc(unsigned int irq)
 	irq_free_descs(irq, 1);
 }
 
-#ifdef CONFIG_GENERIC_IRQ_LEGACY
-void irq_init_desc(unsigned int irq);
-#endif
-
 /**
  * struct irq_chip_regs - register offsets for struct irq_gci
  * @enable:	Enable register offset to reg_base
diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig
index 1da5e9d9da719..36673640c4fc2 100644
--- a/kernel/irq/Kconfig
+++ b/kernel/irq/Kconfig
@@ -6,10 +6,6 @@ menu "IRQ subsystem"
 config MAY_HAVE_SPARSE_IRQ
        bool
 
-# Legacy support, required for itanic
-config GENERIC_IRQ_LEGACY
-       bool
-
 # Enable the generic irq autoprobe mechanism
 config GENERIC_IRQ_PROBE
 	bool
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index b64c57b44c203..db714d3014b5f 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -653,13 +653,6 @@ void irq_mark_irq(unsigned int irq)
 	irq_insert_desc(irq, irq_desc + irq);
 }
 
-#ifdef CONFIG_GENERIC_IRQ_LEGACY
-void irq_init_desc(unsigned int irq)
-{
-	free_desc(irq);
-}
-#endif
-
 #endif /* !CONFIG_SPARSE_IRQ */
 
 int handle_irq_desc(struct irq_desc *desc)
-- 
2.50.1