linux-kernel - Re: [PATCH v11 0/8] Disable compat cruft on ppc64le v11

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Message-ID: <c5f30914-4d0c-5437-e8c4-9d62d08061e1@c-s.fr>
Date:   Thu, 19 Mar 2020 13:36:56 +0100
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Michal Suchanek <msuchanek@...e.de>, linuxppc-dev@...ts.ozlabs.org
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Arnd Bergmann <arnd@...db.de>,
        Nayna Jain <nayna@...ux.ibm.com>,
        Eric Richter <erichte@...ux.ibm.com>,
        Claudio Carvalho <cclaudio@...ux.ibm.com>,
        Nicholas Piggin <npiggin@...il.com>,
        Hari Bathini <hbathini@...ux.ibm.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Thiago Jung Bauermann <bauerman@...ux.ibm.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Valentin Schneider <valentin.schneider@....com>,
        Jordan Niethe <jniethe5@...il.com>,
        Michael Neuling <mikey@...ling.org>,
        Gustavo Luiz Duarte <gustavold@...ux.ibm.com>,
        Allison Randal <allison@...utok.net>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH v11 0/8] Disable compat cruft on ppc64le v11

You sent it twice ? Any difference between the two dispatch ?

Christophe

Le 19/03/2020 à 13:19, Michal Suchanek a écrit :
> Less code means less bugs so add a knob to skip the compat stuff.
> 
> Changes in v2: saner CONFIG_COMPAT ifdefs
> Changes in v3:
>   - change llseek to 32bit instead of builing it unconditionally in fs
>   - clanup the makefile conditionals
>   - remove some ifdefs or convert to IS_DEFINED where possible
> Changes in v4:
>   - cleanup is_32bit_task and current_is_64bit
>   - more makefile cleanup
> Changes in v5:
>   - more current_is_64bit cleanup
>   - split off callchain.c 32bit and 64bit parts
> Changes in v6:
>   - cleanup makefile after split
>   - consolidate read_user_stack_32
>   - fix some checkpatch warnings
> Changes in v7:
>   - add back __ARCH_WANT_SYS_LLSEEK to fix build with llseek
>   - remove leftover hunk
>   - add review tags
> Changes in v8:
>   - consolidate valid_user_sp to fix it in the split callchain.c
>   - fix build errors/warnings with PPC64 !COMPAT and PPC32
> Changes in v9:
>   - remove current_is_64bit()
> Chanegs in v10:
>   - rebase, sent together with the syscall cleanup
> Changes in v11:
>   - rebase
>   - add MAINTAINERS pattern for ppc perf
> 
> Michal Suchanek (8):
>    powerpc: Add back __ARCH_WANT_SYS_LLSEEK macro
>    powerpc: move common register copy functions from signal_32.c to
>      signal.c
>    powerpc/perf: consolidate read_user_stack_32
>    powerpc/perf: consolidate valid_user_sp
>    powerpc/64: make buildable without CONFIG_COMPAT
>    powerpc/64: Make COMPAT user-selectable disabled on littleendian by
>      default.
>    powerpc/perf: split callchain.c by bitness
>    MAINTAINERS: perf: Add pattern that matches ppc perf to the perf
>      entry.
> 
>   MAINTAINERS                            |   2 +
>   arch/powerpc/Kconfig                   |   5 +-
>   arch/powerpc/include/asm/thread_info.h |   4 +-
>   arch/powerpc/include/asm/unistd.h      |   1 +
>   arch/powerpc/kernel/Makefile           |   6 +-
>   arch/powerpc/kernel/entry_64.S         |   2 +
>   arch/powerpc/kernel/signal.c           | 144 +++++++++-
>   arch/powerpc/kernel/signal_32.c        | 140 ----------
>   arch/powerpc/kernel/syscall_64.c       |   6 +-
>   arch/powerpc/kernel/vdso.c             |   3 +-
>   arch/powerpc/perf/Makefile             |   5 +-
>   arch/powerpc/perf/callchain.c          | 356 +------------------------
>   arch/powerpc/perf/callchain.h          |  20 ++
>   arch/powerpc/perf/callchain_32.c       | 196 ++++++++++++++
>   arch/powerpc/perf/callchain_64.c       | 174 ++++++++++++
>   fs/read_write.c                        |   3 +-
>   16 files changed, 556 insertions(+), 511 deletions(-)
>   create mode 100644 arch/powerpc/perf/callchain.h
>   create mode 100644 arch/powerpc/perf/callchain_32.c
>   create mode 100644 arch/powerpc/perf/callchain_64.c
>