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[PATCH] IRQ: drop (effectively) unused flag constants
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 24 Jun 2026 10:09:58 +0200
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Wed, 24 Jun 2026 08:10:09 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
IRQ_PER_CPU and IRQ_GUEST_EOI_PENDING are entirely unused. x86 uses
IRQ_REPLAY, but only ever to clear the bit. Drop all three constants.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
--- a/xen/arch/x86/irq.c
+++ b/xen/arch/x86/irq.c
@@ -2075,7 +2075,6 @@ void do_IRQ(struct cpu_user_regs *regs)
goto out_no_end;
}
- desc->status &= ~IRQ_REPLAY;
desc->status |= IRQ_PENDING;
/*
--- a/xen/include/xen/irq.h
+++ b/xen/include/xen/irq.h
@@ -33,20 +33,15 @@ struct irqaction {
#define _IRQ_INPROGRESS 0 /* IRQ handler active - do not enter! */
#define _IRQ_DISABLED 1 /* IRQ disabled - do not enter! */
#define _IRQ_PENDING 2 /* IRQ pending - replay on enable */
-#define _IRQ_REPLAY 3 /* IRQ has been replayed but not acked yet */
+/* 3 unused */
#define _IRQ_GUEST 4 /* IRQ is handled by guest OS(es) */
#define _IRQ_MOVE_PENDING 5 /* IRQ is migrating to another CPUs */
-#define _IRQ_PER_CPU 6 /* IRQ is per CPU */
-#define _IRQ_GUEST_EOI_PENDING 7 /* IRQ was disabled, pending a guest EOI */
-#define _IRQF_SHARED 8 /* IRQ is shared */
+#define _IRQF_SHARED 6 /* IRQ is shared */
#define IRQ_INPROGRESS (1u<<_IRQ_INPROGRESS)
#define IRQ_DISABLED (1u<<_IRQ_DISABLED)
#define IRQ_PENDING (1u<<_IRQ_PENDING)
-#define IRQ_REPLAY (1u<<_IRQ_REPLAY)
#define IRQ_GUEST (1u<<_IRQ_GUEST)
#define IRQ_MOVE_PENDING (1u<<_IRQ_MOVE_PENDING)
-#define IRQ_PER_CPU (1u<<_IRQ_PER_CPU)
-#define IRQ_GUEST_EOI_PENDING (1u<<_IRQ_GUEST_EOI_PENDING)
#define IRQF_SHARED (1u<<_IRQF_SHARED)
/* Special IRQ numbers. */
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