[PATCH v2] irqchip/irq-brcmstb-l2: Replace brcmstb_l2_mask_and_ack() by generic function

[linux@treblig.org]

From: "Dr. David Alan Gilbert" <linux@treblig.org>

Replace brcmstb_l2_mask_and_ack() by the generic
irq_gc_mask_disable_and_ack_set().

brcmstb_l2_mask_and_ack() was added in commit 49aa6ef0b439
("irqchip/brcmstb-l2: Remove some processing from the handler") in
September 2017 with a comment saying it was actually generic and someone
should add it to the generic code.

commit 20608924cc2e ("genirq: generic chip: Add
irq_gc_mask_disable_and_ack_set()") did that a few weeks later, however no
one went back and took the brcmstb variant out.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://lore.kernel.org/all/20241224001727.149337-1-linux@treblig.org
---
v2
  Add EXPORT_SYMBOL_GPL as spotted by kernel test robot and
  fix suggested by Florian

 drivers/irqchip/irq-brcmstb-l2.c | 28 +---------------------------
 kernel/irq/generic-chip.c        |  1 +
 2 files changed, 2 insertions(+), 27 deletions(-)

diff --git a/drivers/irqchip/irq-brcmstb-l2.c b/drivers/irqchip/irq-brcmstb-l2.c
index c988886917f7..db4c9721fcf2 100644
--- a/drivers/irqchip/irq-brcmstb-l2.c
+++ b/drivers/irqchip/irq-brcmstb-l2.c
@@ -61,32 +61,6 @@ struct brcmstb_l2_intc_data {
 	u32 saved_mask; /* for suspend/resume */
 };
 
-/**
- * brcmstb_l2_mask_and_ack - Mask and ack pending interrupt
- * @d: irq_data
- *
- * Chip has separate enable/disable registers instead of a single mask
- * register and pending interrupt is acknowledged by setting a bit.
- *
- * Note: This function is generic and could easily be added to the
- * generic irqchip implementation if there ever becomes a will to do so.
- * Perhaps with a name like irq_gc_mask_disable_and_ack_set().
- *
- * e.g.: https://patchwork.kernel.org/patch/9831047/
- */
-static void brcmstb_l2_mask_and_ack(struct irq_data *d)
-{
-	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
-	struct irq_chip_type *ct = irq_data_get_chip_type(d);
-	u32 mask = d->mask;
-
-	irq_gc_lock(gc);
-	irq_reg_writel(gc, mask, ct->regs.disable);
-	*ct->mask_cache &= ~mask;
-	irq_reg_writel(gc, mask, ct->regs.ack);
-	irq_gc_unlock(gc);
-}
-
 static void brcmstb_l2_intc_irq_handle(struct irq_desc *desc)
 {
 	struct brcmstb_l2_intc_data *b = irq_desc_get_handler_data(desc);
@@ -248,7 +222,7 @@ static int __init brcmstb_l2_intc_of_init(struct device_node *np,
 	if (init_params->cpu_clear >= 0) {
 		ct->regs.ack = init_params->cpu_clear;
 		ct->chip.irq_ack = irq_gc_ack_set_bit;
-		ct->chip.irq_mask_ack = brcmstb_l2_mask_and_ack;
+		ct->chip.irq_mask_ack = irq_gc_mask_disable_and_ack_set;
 	} else {
 		/* No Ack - but still slightly more efficient to define this */
 		ct->chip.irq_mask_ack = irq_gc_mask_disable_reg;
diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c
index 32ffcbb87fa1..c4a8bca5f2b0 100644
--- a/kernel/irq/generic-chip.c
+++ b/kernel/irq/generic-chip.c
@@ -162,6 +162,7 @@ void irq_gc_mask_disable_and_ack_set(struct irq_data *d)
 	irq_reg_writel(gc, mask, ct->regs.ack);
 	irq_gc_unlock(gc);
 }
+EXPORT_SYMBOL_GPL(irq_gc_mask_disable_and_ack_set);
 
 /**
  * irq_gc_eoi - EOI interrupt
-- 
2.48.0