From: Anders Roxell <anders.roxell@linaro.org>
To: tsbogend@alpha.franken.de, natechancellor@gmail.com,
ndesaulniers@google.com
Cc: linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
clang-built-linux@googlegroups.com,
Anders Roxell <anders.roxell@linaro.org>,
stable@vger.kernel.org
Subject: [PATCH] mips: vdso: fix DWARF2 warning
Date: Fri, 15 Jan 2021 20:13:30 +0100 [thread overview]
Message-ID: <20210115191330.2319352-1-anders.roxell@linaro.org> (raw)
When building mips tinyconifg the following warning show up
make --silent --keep-going --jobs=8 O=/home/anders/src/kernel/next/out/builddir ARCH=mips CROSS_COMPILE=mips-linux-gnu- HOSTCC=clang CC=clang
/srv/src/kernel/next/arch/mips/vdso/elf.S:14:1: warning: DWARF2 only supports one section per compilation unit
.pushsection .note.Linux, "a",@note ; .balign 4 ; .long 2f - 1f ; .long 4484f - 3f ; .long 0 ; 1:.asciz "Linux" ; 2:.balign 4 ; 3:
^
/srv/src/kernel/next/arch/mips/vdso/elf.S:34:2: warning: DWARF2 only supports one section per compilation unit
.section .mips_abiflags, "a"
^
Rework so the mips vdso Makefile adds flag '-no-integrated-as' unless
LLVM_IAS is defined.
Link: https://github.com/ClangBuiltLinux/linux/issues/1256
Cc: stable@vger.kernel.org # v4.19+
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
---
arch/mips/vdso/Makefile | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/mips/vdso/Makefile b/arch/mips/vdso/Makefile
index 5810cc12bc1d..83e8cf216ac8 100644
--- a/arch/mips/vdso/Makefile
+++ b/arch/mips/vdso/Makefile
@@ -26,6 +26,10 @@ ifdef CONFIG_CC_IS_CLANG
ccflags-vdso += $(filter --target=%,$(KBUILD_CFLAGS))
endif
+ifneq ($(LLVM_IAS),1)
+ccflags-vdso += -no-integrated-as
+endif
+
#
# The -fno-jump-tables flag only prevents the compiler from generating
# jump tables but does not prevent the compiler from emitting absolute
--
2.29.2
next reply other threads:[~2021-01-15 19:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-15 19:13 Anders Roxell [this message]
2021-01-15 19:28 ` [PATCH] mips: vdso: fix DWARF2 warning Nathan Chancellor
2021-01-15 19:35 ` Anders Roxell
2021-01-15 20:13 ` Fangrui Song
2021-01-15 20:20 ` Nick Desaulniers
2021-01-15 23:05 ` kernel test robot
2021-01-16 0:46 ` kernel test robot
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