linux-kernel - [PATCH] arch, x86, irq: purge useless handler declarations from hw

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Date:	Tue, 09 Feb 2016 02:43:02 +0100
From:	Nicolai Stange <nicstange@...il.com>
To:	x86@...nel.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] arch, x86, irq: purge useless handler declarations from hw_irq.h

Within arch/x86/include/asm/hw_irq.h, there are some declarations for the
C-level handlers called into directly from the IDT-referenced assembly
stubs.

These declarations are never used as they are referenced from assembly
only.

Furthermore, these declarations got their attributes wrong: there is no
'__irqentry' (parameter passing via stack) attached to them.

Also, the list of declarations isn't complete: none of the tracing-capable
variants is declared, for example.

Purge the handler declarations.

Signed-off-by: Nicolai Stange <nicstange@...il.com>
---
 Patch is against tip x86/core.

 Tested on x86_64, compiled on i386.

 arch/x86/include/asm/hw_irq.h | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index 8fef2ac..91ad899 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -163,20 +163,6 @@ extern atomic_t irq_mis_count;
 
 extern void elcr_set_level_irq(unsigned int irq);
 
-/* SMP */
-extern __visible void smp_apic_timer_interrupt(struct pt_regs *);
-extern __visible void smp_spurious_interrupt(struct pt_regs *);
-extern __visible void smp_x86_platform_ipi(struct pt_regs *);
-extern __visible void smp_error_interrupt(struct pt_regs *);
-#ifdef CONFIG_X86_IO_APIC
-extern asmlinkage void smp_irq_move_cleanup_interrupt(void);
-#endif
-#ifdef CONFIG_SMP
-extern __visible void smp_reschedule_interrupt(struct pt_regs *);
-extern __visible void smp_call_function_interrupt(struct pt_regs *);
-extern __visible void smp_call_function_single_interrupt(struct pt_regs *);
-#endif
-
 extern char irq_entries_start[];
 #ifdef CONFIG_TRACING
 #define trace_irq_entries_start irq_entries_start
-- 
2.7.0