linux-kernel - [PATCH 0/2] Support compiling out the prctl syscall

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Message-ID: <cover.c693f10dfc19e12c214758e4b13ca9b4e4cf9668.1478650356.git-series.josh@joshtriplett.org>
Date:   Tue, 8 Nov 2016 16:17:47 -0800
From:   Josh Triplett <josh@...htriplett.org>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Kees Cook <keescook@...omium.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Arnd Bergmann <arnd@...db.de>, Ingo Molnar <mingo@...nel.org>,
        Andy Lutomirski <luto@...nel.org>,
        Petr Mladek <pmladek@...e.com>,
        Thomas Garnier <thgarnie@...gle.com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Nicolas Pitre <nicolas.pitre@...aro.org>,
        Zefan Li <lizefan@...wei.com>,
        Li Bin <huawei.libin@...wei.com>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Alex Thorlton <athorlton@....com>,
        Michal Hocko <mhocko@...e.com>,
        Mateusz Guzik <mguzik@...hat.com>,
        Cyrill Gorcunov <gorcunov@...nvz.org>,
        John Stultz <john.stultz@...aro.org>,
        Al Viro <viro@...iv.linux.org.uk>, Zach Brown <zab@...hat.com>,
        Anna Schumaker <Anna.Schumaker@...app.com>,
        Dave Hansen <dave.hansen@...el.com>,
        linux-kernel@...r.kernel.org, linux-api@...r.kernel.org
Subject: [PATCH 0/2] Support compiling out the prctl syscall

Some embedded systems can do without the prctl syscall, saving some space.

This also avoids regular increases in tinyconfig size as people add more
non-optional functionality to prctl (observed via the 0-day kernel
infrastructure).

The first patch moves prctl and all its helpers into a separate source file,
kernel/prctl.c, to allow making it optional via the Makefile without any
ifdefs.  The second patch adds the Kconfig option to make prctl optional.

Josh Triplett (2):
  kernel: Move prctl and helpers from kernel/sys.c to new kernel/prctl.c
  kernel: Support compiling out the prctl syscall

 init/Kconfig    |  12 +-
 kernel/Makefile |   1 +-
 kernel/prctl.c  | 684 +++++++++++++++++++++++++++++++++++++++++++++++++-
 kernel/sys.c    | 672 +------------------------------------------------
 kernel/sys_ni.c |   1 +-
 5 files changed, 698 insertions(+), 672 deletions(-)
 create mode 100644 kernel/prctl.c

base-commit: e3a00f68e426df24a5fb98956a1bd1b23943aa1e
-- 
git-series 0.8.11