linux-kernel - [PATCH 1/3] irqchip: xilinx: Avoid __init macro usage for xilinx_intc_of

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Date:   Tue, 27 Apr 2021 17:01:34 +0530
From:   Anirudha Sarangi <anirudha.sarangi@...inx.com>
To:     Marc Zyngier <maz@...nel.org>
CC:     Thomas Gleixner <tglx@...utronix.de>,
        Michal Simek <michal.simek@...inx.com>,
        Valentin Schneider <valentin.schneider@....com>,
        Douglas Anderson <dianders@...omium.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Maulik Shah <mkshah@...eaurora.org>,
        Zhen Lei <thunder.leizhen@...wei.com>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        <devicetree@...r.kernel.org>, <git@...inx.com>,
        Anirudha Sarangi <anirudha.sarangi@...inx.com>
Subject: [PATCH 1/3] irqchip: xilinx: Avoid __init macro usage for xilinx_intc_of_init

This patch ensures that xilinx_intc_of_init API is not allocated into
the .init.text section. Since this API calls the API set_handle_irq
which uses __init macro to be put into .init.text section, this patch
makes changes to ensure that set_handle_irq also does not stay in
.init.text section.
This patch is in preparation for the patch through which the xilinx
intc driver will be loaded and unloaded as a module.

Signed-off-by: Anirudha Sarangi <anirudha.sarangi@...inx.com>
---
 drivers/irqchip/irq-xilinx-intc.c | 4 ++--
 include/linux/irq.h               | 2 +-
 kernel/irq/handle.c               | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/irqchip/irq-xilinx-intc.c b/drivers/irqchip/irq-xilinx-intc.c
index 1d3d273309bd..642733a6cbdf 100644
--- a/drivers/irqchip/irq-xilinx-intc.c
+++ b/drivers/irqchip/irq-xilinx-intc.c
@@ -177,8 +177,8 @@ static void xil_intc_irq_handler(struct irq_desc *desc)
 	chained_irq_exit(chip, desc);
 }
 
-static int __init xilinx_intc_of_init(struct device_node *intc,
-					     struct device_node *parent)
+static int xilinx_intc_of_init(struct device_node *intc,
+			       struct device_node *parent)
 {
 	struct xintc_irq_chip *irqc;
 	int ret, irq;
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 2efde6a79b7e..252fab8074de 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -1250,7 +1250,7 @@ int ipi_send_mask(unsigned int virq, const struct cpumask *dest);
  * Returns 0 on success, or -EBUSY if an IRQ handler has already been
  * registered.
  */
-int __init set_handle_irq(void (*handle_irq)(struct pt_regs *));
+int set_handle_irq(void (*handle_irq)(struct pt_regs *));
 
 /*
  * Allows interrupt handlers to find the irqchip that's been registered as the
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 762a928e18f9..a0b18e8f5af0 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -218,7 +218,7 @@ irqreturn_t handle_irq_event(struct irq_desc *desc)
 }
 
 #ifdef CONFIG_GENERIC_IRQ_MULTI_HANDLER
-int __init set_handle_irq(void (*handle_irq)(struct pt_regs *))
+int set_handle_irq(void (*handle_irq)(struct pt_regs *))
 {
 	if (handle_arch_irq)
 		return -EBUSY;
-- 
2.17.1