linux-kernel - [PATCH] x86/irq: Fix -Wmissing-prototypes warning for init

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Message-Id: <1542074189-3208-1-git-send-email-wang.yi59@zte.com.cn>
Date:   Tue, 13 Nov 2018 09:56:29 +0800
From:   Yi Wang <wang.yi59@....com.cn>
To:     tglx@...utronix.de
Cc:     mingo@...hat.com, bp@...en8.de, hpa@...or.com, x86@...nel.org,
        wang.yi59@....com.cn, linux-kernel@...r.kernel.org,
        zhong.weidong@....com.cn, bp@...e.de
Subject: [PATCH] x86/irq: Fix -Wmissing-prototypes warning for init_IRQ()

We get a warning when building kernel with W=1:
arch/x86/kernel/irqinit.c:79:13: warning: no previous prototype for ‘init_IRQ’ [-Wmissing-prototypes]
 void __init init_IRQ(void)
             ^

Add the missing declaration in head file to fix this.

Signed-off-by: Yi Wang <wang.yi59@....com.cn>
---
 arch/x86/include/asm/irq.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/include/asm/irq.h b/arch/x86/include/asm/irq.h
index 2395bb7..399a9c5 100644
--- a/arch/x86/include/asm/irq.h
+++ b/arch/x86/include/asm/irq.h
@@ -41,6 +41,8 @@ static inline int irq_canonicalize(int irq)
 
 extern void init_ISA_irqs(void);
 
+extern void __init init_IRQ(void);
+
 #ifdef CONFIG_X86_LOCAL_APIC
 void arch_trigger_cpumask_backtrace(const struct cpumask *mask,
 				    bool exclude_self);
-- 
1.8.3.1