Merge tag 'irq-core-2026-02-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq core updates from Thomas Gleixner:
 "Updates for the interrupt core subsystem:

   - Remove the interrupt timing infrastructure

     This was added seven years ago to be used for power management
     purposes, but that integration never happened.

   - Clean up the remaining setup_percpu_irq() users

     The memory allocator is available when interrupts can be requested
     so there is not need for static irq_action. Move the remaining
     users to request_percpu_irq() and delete the historical cruft.

   - Warn when interrupt flag inconsistencies are detected in
     request*_irq().

     Inconsistent flags can lead to hard to diagnose malfunction. The
     fallout of this new warning has been addressed in next and the
     fixes are coming in via the maintainer trees and the tip
     irq/cleanup pull requests.

   - Invoke affinity notifier when CPU hotplug breaks affinity

     Otherwise the code using the notifier misses the affinity change
     and operates on stale information.

   - The usual cleanups and improvements"

* tag 'irq-core-2026-02-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq/proc: Replace snprintf with strscpy in register_handler_proc
  genirq/cpuhotplug: Notify about affinity changes breaking the affinity mask
  genirq: Move clear of kstat_irqs to free_desc()
  genirq: Warn about using IRQF_ONESHOT without a threaded handler
  irqdomain: Fix up const problem in irq_domain_set_name()
  genirq: Remove setup_percpu_irq()
  clocksource/drivers/mips-gic-timer: Move GIC timer to request_percpu_irq()
  MIPS: Move IP27 timer to request_percpu_irq()
  MIPS: Move IP30 timer to request_percpu_irq()
  genirq: Remove __request_percpu_irq() helper
  genirq: Remove IRQ timing tracking infrastructure

2 files changed, 4 insertions, 23 deletions

diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index b2bb878abd11..6cd26ffb0505 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -181,9 +181,8 @@ request_any_context_irq(unsigned int irq, irq_handler_t handler,
 			unsigned long flags, const char *name, void *dev_id);
 
 extern int __must_check
-__request_percpu_irq(unsigned int irq, irq_handler_t handler,
-		     unsigned long flags, const char *devname,
-		     const cpumask_t *affinity, void __percpu *percpu_dev_id);
+request_percpu_irq_affinity(unsigned int irq, irq_handler_t handler, const char *devname,
+			    const cpumask_t *affinity, void __percpu *percpu_dev_id);
 
 extern int __must_check
 request_nmi(unsigned int irq, irq_handler_t handler, unsigned long flags,
@@ -193,17 +192,8 @@ static inline int __must_check
 request_percpu_irq(unsigned int irq, irq_handler_t handler,
 		   const char *devname, void __percpu *percpu_dev_id)
 {
-	return __request_percpu_irq(irq, handler, 0,
-				    devname, NULL, percpu_dev_id);
-}
-
-static inline int __must_check
-request_percpu_irq_affinity(unsigned int irq, irq_handler_t handler,
-			    const char *devname, const cpumask_t *affinity,
-			    void __percpu *percpu_dev_id)
-{
-	return __request_percpu_irq(irq, handler, 0,
-				    devname, affinity, percpu_dev_id);
+	return request_percpu_irq_affinity(irq, handler, devname,
+					   NULL, percpu_dev_id);
 }
 
 extern int __must_check
@@ -871,12 +861,6 @@ static inline void init_irq_proc(void)
 }
 #endif
 
-#ifdef CONFIG_IRQ_TIMINGS
-void irq_timings_enable(void);
-void irq_timings_disable(void);
-u64 irq_timings_next_event(u64 now);
-#endif
-
 struct seq_file;
 int show_interrupts(struct seq_file *p, void *v);
 int arch_show_interrupts(struct seq_file *p, int prec);
diff --git a/include/linux/irq.h b/include/linux/irq.h
index ef0816fdc6f2..91afd25faa28 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -595,9 +595,6 @@ enum {
 
 #define IRQ_DEFAULT_INIT_FLAGS	ARCH_IRQ_INIT_FLAGS
 
-struct irqaction;
-extern int setup_percpu_irq(unsigned int irq, struct irqaction *new);
-
 #ifdef CONFIG_DEPRECATED_IRQ_CPU_ONOFFLINE
 extern void irq_cpu_online(void);
 extern void irq_cpu_offline(void);