[PATCH 3/3] x86: error_inject: make just_return_func globally visible

From: Arnd Bergmann <arnd@arndb.de>
To: x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>
Cc: Nicolas Pitre <nico@linaro.org>, Andi Kleen <ak@linux.intel.com>,
	linux-kernel@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	Josef Bacik <jbacik@fb.com>, Alexei Starovoitov <ast@kernel.org>
Subject: [PATCH 3/3] x86: error_inject: make  just_return_func globally visible
Date: Fri,  2 Feb 2018 15:56:19 +0100	[thread overview]
Message-ID: <20180202145634.200291-3-arnd@arndb.de> (raw)
In-Reply-To: <20180202145634.200291-1-arnd@arndb.de>

With link time optimizations enabled, I get a link failure:

./ccLbOEHX.ltrans19.ltrans.o: In function `override_function_with_return':
<artificial>:(.text+0x7f3): undefined reference to `just_return_func'

Marking the symbol .globl makes it work as expected.

Fixes: 540adea3809f ("error-injection: Separate error-injection from kprobe")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/x86/lib/error-inject.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/lib/error-inject.c b/arch/x86/lib/error-inject.c
index 7b881d03d0dd..3cdf06128d13 100644
--- a/arch/x86/lib/error-inject.c
+++ b/arch/x86/lib/error-inject.c
@@ -7,6 +7,7 @@ asmlinkage void just_return_func(void);
 
 asm(
 	".type just_return_func, @function\n"
+	".globl just_return_func\n"
 	"just_return_func:\n"
 	"	ret\n"
 	".size just_return_func, .-just_return_func\n"
-- 
2.9.0
