linux-kernel - [PATCH AUTOSEL 3.18 2/4] RISC-V: include linux/ftrace.h in asm-prototypes.h

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Message-Id: <20181008152749.71018-2-sashal@kernel.org>
Date:   Mon,  8 Oct 2018 11:27:47 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     stable@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     James Cowgill <jcowgill@...ian.org>,
        Palmer Dabbelt <palmer@...ive.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH AUTOSEL 3.18 2/4] RISC-V: include linux/ftrace.h in asm-prototypes.h

From: James Cowgill <jcowgill@...ian.org>

[ Upstream commit 57a489786de9ec37d6e25ef1305dc337047f0236 ]

Building a riscv kernel with CONFIG_FUNCTION_TRACER and
CONFIG_MODVERSIONS enabled results in these two warnings:

  MODPOST vmlinux.o
WARNING: EXPORT symbol "return_to_handler" [vmlinux] version generation failed, symbol will not be versioned.
WARNING: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned.

When exporting symbols from an assembly file, the MODVERSIONS code
requires their prototypes to be defined in asm-prototypes.h (see
scripts/Makefile.build). Since both of these symbols have prototypes
defined in linux/ftrace.h, include this header from RISC-V's
asm-prototypes.h.

Reported-by: Karsten Merker <merker@...ian.org>
Signed-off-by: James Cowgill <jcowgill@...ian.org>
Signed-off-by: Palmer Dabbelt <palmer@...ive.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 arch/riscv/include/asm/asm-prototypes.h | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 arch/riscv/include/asm/asm-prototypes.h

diff --git a/arch/riscv/include/asm/asm-prototypes.h b/arch/riscv/include/asm/asm-prototypes.h
new file mode 100644
index 000000000000..c9fecd120d18
--- /dev/null
+++ b/arch/riscv/include/asm/asm-prototypes.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_RISCV_PROTOTYPES_H
+
+#include <linux/ftrace.h>
+#include <asm-generic/asm-prototypes.h>
+
+#endif /* _ASM_RISCV_PROTOTYPES_H */
-- 
2.17.1