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genirq: Remove preflow handler support

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That was put in place for sparc64, and blackfin also used it for some time;
sparc64 no longer uses those, and blackfin is dead.

As there are no more users, remove preflow handlers.

Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200703155645.29703-3-valentin.schneider@arm.com
This commit is contained in:
Valentin Schneider 2020-07-03 16:56:45 +01:00 committed by Thomas Gleixner
parent 959f53bd90
commit 8fa88a88d5
4 changed files with 0 additions and 33 deletions
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15
include/linux/irqdesc.h
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@ -22,7 +22,6 @@ struct pt_regs;
* @irq_common_data: per irq and chip data passed down to chip functions * @irq_common_data: per irq and chip data passed down to chip functions
* @kstat_irqs: irq stats per cpu * @kstat_irqs: irq stats per cpu
* @handle_irq: highlevel irq-events handler * @handle_irq: highlevel irq-events handler
* @preflow_handler: handler called before the flow handler (currently used by sparc)
* @action: the irq action chain * @action: the irq action chain
* @status_use_accessors: status information * @status_use_accessors: status information
* @core_internal_state__do_not_mess_with_it: core internal status information * @core_internal_state__do_not_mess_with_it: core internal status information
@ -58,9 +57,6 @@ struct irq_desc {
struct irq_data irq_data; struct irq_data irq_data;
unsigned int __percpu *kstat_irqs; unsigned int __percpu *kstat_irqs;
irq_flow_handler_t handle_irq; irq_flow_handler_t handle_irq;
#ifdef CONFIG_IRQ_PREFLOW_FASTEOI
irq_preflow_handler_t preflow_handler;
#endif
struct irqaction *action; /* IRQ action list */ struct irqaction *action; /* IRQ action list */
unsigned int status_use_accessors; unsigned int status_use_accessors;
unsigned int core_internal_state__do_not_mess_with_it; unsigned int core_internal_state__do_not_mess_with_it;
@ -268,15 +264,4 @@ irq_set_lockdep_class(unsigned int irq, struct lock_class_key *lock_class,
} }
} }
#ifdef CONFIG_IRQ_PREFLOW_FASTEOI
static inline void
__irq_set_preflow_handler(unsigned int irq, irq_preflow_handler_t handler)
{
struct irq_desc *desc;
desc = irq_to_desc(irq);
desc->preflow_handler = handler;
}
#endif
#endif #endif

1
include/linux/irqhandler.h
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@ -10,6 +10,5 @@
struct irq_desc; struct irq_desc;
struct irq_data; struct irq_data;
typedef void (*irq_flow_handler_t)(struct irq_desc *desc); typedef void (*irq_flow_handler_t)(struct irq_desc *desc);
typedef void (*irq_preflow_handler_t)(struct irq_data *data);
#endif #endif

4
kernel/irq/Kconfig
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@ -51,10 +51,6 @@ config GENERIC_IRQ_INJECTION
config HARDIRQS_SW_RESEND config HARDIRQS_SW_RESEND
bool bool
# Preflow handler support for fasteoi (sparc64)
config IRQ_PREFLOW_FASTEOI
bool
# Edge style eoi based handler (cell) # Edge style eoi based handler (cell)
config IRQ_EDGE_EOI_HANDLER config IRQ_EDGE_EOI_HANDLER
bool bool

13
kernel/irq/chip.c
View File

@ -656,16 +656,6 @@ out_unlock:
} }
EXPORT_SYMBOL_GPL(handle_level_irq); EXPORT_SYMBOL_GPL(handle_level_irq);
#ifdef CONFIG_IRQ_PREFLOW_FASTEOI
static inline void preflow_handler(struct irq_desc *desc)
{
if (desc->preflow_handler)
desc->preflow_handler(&desc->irq_data);
}
#else
static inline void preflow_handler(struct irq_desc *desc) { }
#endif
static void cond_unmask_eoi_irq(struct irq_desc *desc, struct irq_chip *chip) static void cond_unmask_eoi_irq(struct irq_desc *desc, struct irq_chip *chip)
{ {
if (!(desc->istate & IRQS_ONESHOT)) { if (!(desc->istate & IRQS_ONESHOT)) {
@ -721,7 +711,6 @@ void handle_fasteoi_irq(struct irq_desc *desc)
if (desc->istate & IRQS_ONESHOT) if (desc->istate & IRQS_ONESHOT)
mask_irq(desc); mask_irq(desc);
preflow_handler(desc);
handle_irq_event(desc); handle_irq_event(desc);
cond_unmask_eoi_irq(desc, chip); cond_unmask_eoi_irq(desc, chip);
@ -1231,7 +1220,6 @@ void handle_fasteoi_ack_irq(struct irq_desc *desc)
/* Start handling the irq */ /* Start handling the irq */
desc->irq_data.chip->irq_ack(&desc->irq_data); desc->irq_data.chip->irq_ack(&desc->irq_data);
preflow_handler(desc);
handle_irq_event(desc); handle_irq_event(desc);
cond_unmask_eoi_irq(desc, chip); cond_unmask_eoi_irq(desc, chip);
@ -1281,7 +1269,6 @@ void handle_fasteoi_mask_irq(struct irq_desc *desc)
if (desc->istate & IRQS_ONESHOT) if (desc->istate & IRQS_ONESHOT)
mask_irq(desc); mask_irq(desc);
preflow_handler(desc);
handle_irq_event(desc); handle_irq_event(desc);
cond_unmask_eoi_irq(desc, chip); cond_unmask_eoi_irq(desc, chip);