linux-kernel - [PATCH 03/24] x86/traps: Move declaration of native_irq_return

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Date:   Wed,  1 Sep 2021 01:50:04 +0800
From:   Lai Jiangshan <jiangshanlai@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Lai Jiangshan <laijs@...ux.alibaba.com>,
        Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH 03/24] x86/traps: Move declaration of native_irq_return_iret up

From: Lai Jiangshan <laijs@...ux.alibaba.com>

The declaration of native_irq_return_iret is used in exc_double_fault()
only by now.  But it will be used in other place later, so the declaration
is moved up for preparation.

Signed-off-by: Lai Jiangshan <laijs@...ux.alibaba.com>
---
 arch/x86/entry/traps.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/entry/traps.c b/arch/x86/entry/traps.c
index a58800973aed..7869343473b7 100644
--- a/arch/x86/entry/traps.c
+++ b/arch/x86/entry/traps.c
@@ -65,6 +65,9 @@
 #ifdef CONFIG_X86_64
 #include <asm/x86_init.h>
 #include <asm/proto.h>
+
+extern unsigned char native_irq_return_iret[];
+
 #else
 #include <asm/processor-flags.h>
 #include <asm/setup.h>
@@ -356,8 +359,6 @@ DEFINE_IDTENTRY_DF(exc_double_fault)
 #endif
 
 #ifdef CONFIG_X86_ESPFIX64
-	extern unsigned char native_irq_return_iret[];
-
 	/*
 	 * If IRET takes a non-IST fault on the espfix64 stack, then we
 	 * end up promoting it to a doublefault.  In that case, take
-- 
2.19.1.6.gb485710b