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Message-Id: <20220620124745.846319559@linuxfoundation.org>
Date: Mon, 20 Jun 2022 14:52:19 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Andreas Schwab <schwab@...ux-m68k.org>,
Randy Dunlap <rdunlap@...radead.org>,
Arvind Sankar <nivedita@...m.mit.edu>,
Palmer Dabbelt <palmerdabbelt@...gle.com>,
Nick Desaulniers <ndesaulniers@...gle.com>,
Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH 5.4 238/240] RISC-V: fix barrier() use in <vdso/processor.h>
From: Randy Dunlap <rdunlap@...radead.org>
commit 30aca1bacb398dec6c1ed5eeca33f355bd7b6203 upstream.
riscv's <vdso/processor.h> uses barrier() so it should include
<asm/barrier.h>
Fixes this build error:
CC [M] drivers/net/ethernet/emulex/benet/be_main.o
In file included from ./include/vdso/processor.h:10,
from ./arch/riscv/include/asm/processor.h:11,
from ./include/linux/prefetch.h:15,
from drivers/net/ethernet/emulex/benet/be_main.c:14:
./arch/riscv/include/asm/vdso/processor.h: In function 'cpu_relax':
./arch/riscv/include/asm/vdso/processor.h:14:2: error: implicit declaration of function 'barrier' [-Werror=implicit-function-declaration]
14 | barrier();
This happens with a total of 5 networking drivers -- they all use
<linux/prefetch.h>.
rv64 allmodconfig now builds cleanly after this patch.
Fixes fallout from:
815f0ddb346c ("include/linux/compiler*.h: make compiler-*.h mutually exclusive")
Fixes: ad5d1122b82f ("riscv: use vDSO common flow to reduce the latency of the time-related functions")
Reported-by: Andreas Schwab <schwab@...ux-m68k.org>
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Acked-by: Arvind Sankar <nivedita@...m.mit.edu>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@...gle.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@...gle.com>
[sudip: change in old path]
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
arch/riscv/include/asm/processor.h | 2 ++
1 file changed, 2 insertions(+)
--- a/arch/riscv/include/asm/processor.h
+++ b/arch/riscv/include/asm/processor.h
@@ -22,6 +22,8 @@
#ifndef __ASSEMBLY__
+#include <asm/barrier.h>
+
struct task_struct;
struct pt_regs;
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