[PATCH 5/5] Revert "genirq: Add fasteoi IPI flow"

From: Valentin Schneider
Date: Mon Nov 09 2020 - 04:43:06 EST


handle_percpu_devid_fasteoi_ipi() has no more users, and
handle_percpu_devid_irq() can do all that it was supposed to do. Get rid of
it.

This reverts commit c5e5ec033c4ab25c53f1fd217849e75deb0bf7bf.

Signed-off-by: Valentin Schneider <valentin.schneider@xxxxxxx>
---
include/linux/irq.h | 1 -
kernel/irq/chip.c | 27 ---------------------------
2 files changed, 28 deletions(-)

diff --git a/include/linux/irq.h b/include/linux/irq.h
index c54365309e97..ca26bec51cec 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -647,7 +647,6 @@ static inline int irq_set_parent(int irq, int parent_irq)
*/
extern void handle_level_irq(struct irq_desc *desc);
extern void handle_fasteoi_irq(struct irq_desc *desc);
-extern void handle_percpu_devid_fasteoi_ipi(struct irq_desc *desc);
extern void handle_edge_irq(struct irq_desc *desc);
extern void handle_edge_eoi_irq(struct irq_desc *desc);
extern void handle_simple_irq(struct irq_desc *desc);
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index b9b9618e1aca..0ae308efa604 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -944,33 +944,6 @@ void handle_percpu_devid_irq(struct irq_desc *desc)
chip->irq_eoi(&desc->irq_data);
}

-/**
- * handle_percpu_devid_fasteoi_ipi - Per CPU local IPI handler with per cpu
- * dev ids
- * @desc: the interrupt description structure for this irq
- *
- * The biggest difference with the IRQ version is that the interrupt is
- * EOIed early, as the IPI could result in a context switch, and we need to
- * make sure the IPI can fire again. We also assume that the arch code has
- * registered an action. If not, we are positively doomed.
- */
-void handle_percpu_devid_fasteoi_ipi(struct irq_desc *desc)
-{
- struct irq_chip *chip = irq_desc_get_chip(desc);
- struct irqaction *action = desc->action;
- unsigned int irq = irq_desc_get_irq(desc);
- irqreturn_t res;
-
- __kstat_incr_irqs_this_cpu(desc);
-
- if (chip->irq_eoi)
- chip->irq_eoi(&desc->irq_data);
-
- trace_irq_handler_entry(irq, action);
- res = action->handler(irq, raw_cpu_ptr(action->percpu_dev_id));
- trace_irq_handler_exit(irq, action, res);
-}
-
/**
* handle_percpu_devid_fasteoi_nmi - Per CPU local NMI handler with per cpu
* dev ids
--
2.27.0