Re: ARC stable backport request

[Vineet Gupta]

On 08/22/2016 11:14 AM, Levin, Alexander wrote:
> On Mon, Aug 22, 2016 at 10:36:20AM -0700, Vineet Gupta wrote:
>> Hi Stable Team,
>>
>> Could you please backport upstream 20d780374c81c ("ARC: build: Better way to
>> detect ISA compatible toolchain")
>>
>> This is needed to let kernel building with newer gcc 6.x based tools.
>>
>> Thx,
>> -Vineet
> 
> What's the version range? It looks to me like it depends on 1f6ccfff6
> ("ARCv2: Support for ARCv2 ISA and HS38x cores") which means 4.2+?
> 

Correct - I realized that I missed out mentioning the range after pressing send.

Thx,
-Vineet

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Re: [PATCH] tools lib: Reinstate strlcpy() header guard with __UCLIBC__

[Arnaldo Carvalho de Melo]

Em Mon, Aug 22, 2016 at 06:01:08PM +, Alexey Brodkin escreveu:
> On Fri, 2016-08-19 at 20:02 -0300, Arnaldo Carvalho de Melo wrote:
> > Em Fri, Aug 19, 2016 at 06:42:07PM -0300, Arnaldo Carvalho de Melo escreveu:
> > > Em Fri, Aug 19, 2016 at 02:27:58PM -0700, Vineet Gupta escreveu:
> > > > corresponding buildroot package folder. Give this a shot - otherwise it 
> > > > is easier
> > > > to just build a custom toolchain with pre-req packages from buildroot. 
> > > > Or can be
> > > > provided if you so deem fit !

> > Please, if you do that, then I'll be able to test more stuff, I already
> > had enough fun trying to get elfutils, argp-standalone and libelf built
> > on this env :-\

> Please find a tarball with prebuilt toolchain for ARC HS38 by that link:
> https://www.dropbox.com/s/uvqla26pmq03h5u/br-2016.08-rc2-65-g11109fd-archs38.tar.gz?dl=0

Thanks for that, I'm behind a slow connection right now, will try later,
but can you consider leaving this on a permanent location? At some point
I'll publish my Dockerfiles, probably on the kernel sources, so that
other people can replicate my test build environment, and then it would
be nice for them to be able to audit what is in there, where the
toolchains/packages come from, etc.

For reference, this is how I have the ARC-uclibc set up right now, with
the previous toolchain Vineet provided me:

[root@jouet perf]# cat fedora/24/x-ARC-uClibc/Dockerfile
# docker.io/acmel/linux-perf-tools-build-fedora:24-x-ARC-uClibc
FROM docker.io/fedora:24
MAINTAINER Arnaldo Carvalho de Melo 
ENV TOOLCHAIN=arc_gnu_2016.03_prebuilt_uclibc_le_archs_linux_install
ENV CROSS=arc-linux-
# binutils for ar, used without cross compiler prefix in libelf build
RUN SOURCEFILE=${TOOLCHAIN}.tar.gz && \
dnf -y install make flex bison binutils wget tar bzip2 && \
dnf -y clean all && \
mkdir -m 777 -p /tmp/build/perf && \
curl -OL 
https://github.com/foss-for-synopsys-dwc-arc-processors/toolchain/releases/download/arc-2016.03/${SOURCEFILE}
 && \
tar xf ${SOURCEFILE} && \
rm -f ${SOURCEFILE} && \
export TARGET=arc-snps-linux-uclibc && \
export INSTALLDIR=/${TOOLCHAIN}/${TARGET}/sysroot/ && \
export PATH=/${TOOLCHAIN}/bin:$PATH && \
export TARGETMACH=${TARGET} && \
export CC=${CROSS}gcc && \
export LD=${CROSS}ld && \
export AS=${CROSS}as && \
export AR=${CROSS}ar && \
wget -q http://zlib.net/zlib-1.2.8.tar.gz && \
tar xf zlib-1.2.8.tar.gz && \
cd zlib-1.2.8 && \
./configure --prefix=${INSTALLDIR} && \
make && \
make install && \
cd .. && \
rm -rf zlib-1.2.8 && \
rm -f zlib-1.2.8.tar.gz && \
dnf -y remove tar wget bzip2 binutils && \
groupadd -r perfbuilder && \
useradd -r -g perfbuilder perfbuilder
USER perfbuilder
ENTRYPOINT make -C /git/linux/tools/perf O=/tmp/build/perf NO_LIBBPF=1
ARCH=arc CROSS_COMPILE=/${TOOLCHAIN}/bin/${CROSS}

- Arnaldo
 
> Just FYI I built it from today's BR sources, i.e. this is gcc6 based with all 
> latest fixes
> for ARC on top of vanilla gcc 6.1.1.
> 
> That's a defconfig I used in Buildroot:
> >8-
> BR2_arcle=y
> BR2_archs38=y
> BR2_TOOLCHAIN_BUILDROOT_INET_RPC=y
> BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
> BR2_PACKAGE_ELFUTILS=y
> >8-
> 
> -Alexey

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[GIT PULL] ARC fixes for 4.8 rc4

[Vineet Gupta]

Hi Linus,

Please pull.

Thx,
-Vineet

>
The following changes since commit 29b4817d4018df78086157ea3a55c1d9424a7cfc:

  Linux 4.8-rc1 (2016-08-07 18:18:00 -0700)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc.git/ 
tags/arc-4.8-rc4-fixes

for you to fetch changes up to c57653dc94d0db7bf63067433ceaa97bdcd0a312:

  ARC: export __udivdi3 for modules (2016-08-19 14:09:33 -0700)


ARC Fixes for 4.8-rc4

- Support for Syscall ABI v4 with upstream gcc 6.x

- Lockdep fix (Daniel Mentz)

- gdb register clobber (Liav Rehana)

- Couple of missing exports for modules

- Other fixes here and there


Daniel Mentz (1):
  ARC: Call trace_hardirqs_on() before enabling irqs

Liav Rehana (1):
  ARC: use correct offset in pt_regs for saving/restoring user mode r25

Vineet Gupta (5):
  ARC: Elide redundant setup of DMA callbacks
  ARC: Support syscall ABI v4
  ARC: export kmap
  ARC: mm: fix build breakage with STRICT_MM_TYPECHECKS
  ARC: export __udivdi3 for modules

 arch/arc/include/asm/entry.h|  4 ++--
 arch/arc/include/asm/irqflags-compact.h |  2 +-
 arch/arc/include/asm/pgtable.h  |  2 +-
 arch/arc/include/uapi/asm/elf.h | 11 +--
 arch/arc/kernel/arcksyms.c  |  2 ++
 arch/arc/kernel/process.c   |  2 +-
 arch/arc/kernel/setup.c |  6 --
 arch/arc/mm/cache.c |  9 +
 arch/arc/mm/highmem.c   |  1 +
 9 files changed, 30 insertions(+), 9 deletions(-)

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Re: [PATCH] tools lib: Reinstate strlcpy() header guard with __UCLIBC__

[Alexey Brodkin]

Hi Arnaldo,

On Fri, 2016-08-19 at 20:02 -0300, Arnaldo Carvalho de Melo wrote:
> Em Fri, Aug 19, 2016 at 06:42:07PM -0300, Arnaldo Carvalho de Melo escreveu:
> > 
> > Em Fri, Aug 19, 2016 at 02:27:58PM -0700, Vineet Gupta escreveu:
> > > 
> > > On 08/19/2016 02:10 PM, Arnaldo Carvalho de Melo wrote:
> > > > 
> > > > > 
> > > > > But one question: when you test build, do you have any extra devel
> > > > > > 
> > > > > > packages installed besides what is in this prebuilt toolchain 
> > > > > > tarball?
> > > > > > 
> > > > > > I'll add at least zlib and elfutils to the mix, building it in the
> > > > > > docker image creation process, and then testing with/without
> > > > > > NO_LIBELF=1, as I do to other cross-building images:
> > > > Trying to build elfutils 0.166:
> > > > 
> > > > checking whether gcc accepts -Wduplicated-cond... no
> > > > checking whether gcc accepts -Wnull-dereference... no
> > > > configure: WARNING: "libc does not have argp"
> > > > checking for argp_parse in -largp... no
> > > > configure: error: "no libargp found"
> > > > 
> > > > 
> > > > 
> > > > will go errands now, will try to check what is needed to build elfutils
> > > > with uclibc, ideas?
> > > 
> > > So back in 3.2 days I ran into these issues with elfutils - the 
> > > workaround was to
> > > use the standalone libelf
> > > http://www.mr511.de/software/libelf-0.8.9.tar.gz.
> > 
> > Ok, so I'll git it a try with libelf, lets see...
> 
> Argh, give up, now it is refusing to build shared libraries:
> 
>   checking for native ELF system... no
>   configure: warning: shared libraries not supported for arc-snps-linux-uclibc
> 
> And also it says ELF64 isn't support and thus GElf, some more details,
> anyway.
>   
> > 
> > > 
> > > Not sure if you will be willing to take that path.
> > > 
> > > OTOH, you could use standalone argp @ 
> > > http://www.lysator.liu.se/~nisse/archive but
> > > it seems that requires a bunch of patches too - from looking into the
> 
> > 
> > > 
> > > corresponding buildroot package folder. Give this a shot - otherwise it 
> > > is easier
> > > to just build a custom toolchain with pre-req packages from buildroot. Or 
> > > can be
> > > provided if you so deem fit !
> 
> Please, if you do that, then I'll be able to test more stuff, I already
> had enough fun trying to get elfutils, argp-standalone and libelf built
> on this env :-\

Please find a tarball with prebuilt toolchain for ARC HS38 by that link:
https://www.dropbox.com/s/uvqla26pmq03h5u/br-2016.08-rc2-65-g11109fd-archs38.tar.gz?dl=0

Just FYI I built it from today's BR sources, i.e. this is gcc6 based with all 
latest fixes
for ARC on top of vanilla gcc 6.1.1.

That's a defconfig I used in Buildroot:
>8-
BR2_arcle=y
BR2_archs38=y
BR2_TOOLCHAIN_BUILDROOT_INET_RPC=y
BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
BR2_PACKAGE_ELFUTILS=y
>8-

-Alexey
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ARC stable backport request

[Vineet Gupta]

Hi Stable Team,

Could you please backport upstream 20d780374c81c ("ARC: build: Better way to
detect ISA compatible toolchain")

This is needed to let kernel building with newer gcc 6.x based tools.

Thx,
-Vineet

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