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Message-Id: <20200527134847.1014162-1-arnd@arndb.de>
Date: Wed, 27 May 2020 15:48:33 +0200
From: Arnd Bergmann <arnd@...db.de>
To: Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
x86@...nel.org, Alexandre Chartre <alexandre.chartre@...cle.com>,
Andy Lutomirski <luto@...nel.org>,
Peter Zijlstra <peterz@...radead.org>
Cc: Arnd Bergmann <arnd@...db.de>, "H. Peter Anvin" <hpa@...or.com>,
"Eric W. Biederman" <ebiederm@...ssion.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH] x86/entry: Fix unused-function warning
The new 'address' variable is only used in some configurations:
arch/x86/kernel/traps.c:332:16: error: unused variable 'address' [-Werror,-Wunused-variable]
unsigned long address = read_cr2();
Change the #ifdef guard to cover this case as well.
Fixes: 095b7a3e7745 ("x86/entry: Convert double fault exception to IDTENTRY_DF")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
arch/x86/kernel/traps.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 35298c1df32f..c9d0d466641a 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -328,7 +328,7 @@ DEFINE_IDTENTRY_DF(exc_double_fault)
static const char str[] = "double fault";
struct task_struct *tsk = current;
-#ifdef CONFIG_X86_64
+#if defined(CONFIG_X86_64) && defined(CONFIG_VMAP_STACK)
unsigned long address = read_cr2();
#endif
--
2.26.2
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