This is a note to let you know that I've just added the patch titled
MIPS: VDSO: Use CLANG_FLAGS instead of filtering out '--target='
to the 5.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mips-vdso-use-clang_flags-instead-of-filtering-out-target.patch
and it can be found in the queue-5.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 76d7fff22be3e4185ee5f9da2eecbd8188e76b2c Mon Sep 17 00:00:00 2001
From: Nathan Chancellor <natechancellor@xxxxxxxxx>
Date: Fri, 15 Jan 2021 12:26:22 -0700
Subject: MIPS: VDSO: Use CLANG_FLAGS instead of filtering out '--target='
From: Nathan Chancellor <natechancellor@xxxxxxxxx>
commit 76d7fff22be3e4185ee5f9da2eecbd8188e76b2c upstream.
Commit ee67855ecd9d ("MIPS: vdso: Allow clang's --target flag in VDSO
cflags") allowed the '--target=' flag from the main Makefile to filter
through to the vDSO. However, it did not bring any of the other clang
specific flags for controlling the integrated assembler and the GNU
tools locations (--prefix=, --gcc-toolchain=, and -no-integrated-as).
Without these, we will get a warning (visible with tinyconfig):
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:
^
arch/mips/vdso/elf.S:34:2: warning: DWARF2 only supports one section per
compilation unit
.section .mips_abiflags, "a"
^
All of these flags are bundled up under CLANG_FLAGS in the main Makefile
and exported so that they can be added to Makefiles that set their own
CFLAGS. Use this value instead of filtering out '--target=' so there is
no warning and all of the tools are properly used.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: ee67855ecd9d ("MIPS: vdso: Allow clang's --target flag in VDSO cflags")
Link: https://github.com/ClangBuiltLinux/linux/issues/1256
Reported-by: Anders Roxell <anders.roxell@xxxxxxxxxx>
Signed-off-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
Tested-by: Anders Roxell <anders.roxell@xxxxxxxxxx>
Signed-off-by: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/mips/vdso/Makefile | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
--- a/arch/mips/vdso/Makefile
+++ b/arch/mips/vdso/Makefile
@@ -16,16 +16,13 @@ ccflags-vdso := \
$(filter -march=%,$(KBUILD_CFLAGS)) \
$(filter -m%-float,$(KBUILD_CFLAGS)) \
$(filter -mno-loongson-%,$(KBUILD_CFLAGS)) \
+ $(CLANG_FLAGS) \
-D__VDSO__
ifndef CONFIG_64BIT
ccflags-vdso += -DBUILD_VDSO32
endif
-ifdef CONFIG_CC_IS_CLANG
-ccflags-vdso += $(filter --target=%,$(KBUILD_CFLAGS))
-endif
-
#
# The -fno-jump-tables flag only prevents the compiler from generating
# jump tables but does not prevent the compiler from emitting absolute
Patches currently in stable-queue which might be from natechancellor@xxxxxxxxx are
queue-5.11/mips-vmlinux.lds.s-add-missing-page_aligned_data-section.patch
queue-5.11/dmaengine-qcom-always-inline-gpi_update_reg.patch
queue-5.11/mips-compare-__sync_loongson3_war-against-0.patch
queue-5.11/mips-properly-stop-.eh_frame-generation.patch
queue-5.11/mips-lantiq-explicitly-compare-ltq_ebu_pcc_istat-aga.patch
queue-5.11/mips-c-r4k-fix-section-mismatch-for-loongson2_sc_ini.patch
queue-5.11/jffs2-fix-use-after-free-in-jffs2_sum_write_data.patch
queue-5.11/mips-vdso-use-clang_flags-instead-of-filtering-out-target.patch
queue-5.11/mm-rmap-fix-potential-pte_unmap-on-an-not-mapped-pte.patch
queue-5.11/ubifs-replay-fix-high-stack-usage-again.patch
