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[v4,0/9] ARM: remove set_fs callers and implementation

Message ID 20201030154519.1245983-1-arnd@kernel.org (mailing list archive)
Headers show
Series ARM: remove set_fs callers and implementation | expand

Message

Arnd Bergmann Oct. 30, 2020, 3:45 p.m. UTC 
From: Arnd Bergmann <arnd@arndb.de>

Hi Christoph, Russell,

This is the rebased version of my ARM set_fs patches on top of
v5.10-rc1, dropping the TASK_SIZE_MAX patch but leaving everything
else unchanged.

I have tested the oabi-compat changes using the LTP tests for the three
modified syscalls using an Armv7 kernel and a Debian 5 OABI user space.

I also tested the syscall_get_nr() in all combinations of OABI/EABI
kernel user space and fixed the bugs I found after Russell pointed
out one of those issues.

Russell, you can pull these from

 https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git arm-setfs_v4

or I can add them to the ARM patch tracker if you prefer.

     Arnd


Arnd Bergmann (9):
  mm/maccess: fix unaligned copy_{from,to}_kernel_nofault
  ARM: traps: use get_kernel_nofault instead of set_fs()
  ARM: oabi-compat: add epoll_pwait handler
  ARM: syscall: always store thread_info->syscall
  ARM: oabi-compat: rework epoll_wait/epoll_pwait emulation
  ARM: oabi-compat: rework sys_semtimedop emulation
  ARM: oabi-compat: rework fcntl64() emulation
  ARM: uaccess: add __{get,put}_kernel_nofault
  ARM: uaccess: remove set_fs() implementation

 arch/arm/Kconfig                   |   1 -
 arch/arm/include/asm/ptrace.h      |   1 -
 arch/arm/include/asm/syscall.h     |  16 ++-
 arch/arm/include/asm/thread_info.h |   4 -
 arch/arm/include/asm/uaccess-asm.h |   6 -
 arch/arm/include/asm/uaccess.h     | 169 ++++++++++++++-------------
 arch/arm/kernel/asm-offsets.c      |   3 +-
 arch/arm/kernel/entry-common.S     |  17 +--
 arch/arm/kernel/process.c          |   7 +-
 arch/arm/kernel/ptrace.c           |   9 +-
 arch/arm/kernel/signal.c           |   8 --
 arch/arm/kernel/sys_oabi-compat.c  | 181 ++++++++++++++++-------------
 arch/arm/kernel/traps.c            |  47 +++-----
 arch/arm/lib/copy_from_user.S      |   3 +-
 arch/arm/lib/copy_to_user.S        |   3 +-
 arch/arm/tools/syscall.tbl         |   2 +-
 fs/eventpoll.c                     |   5 +-
 include/linux/eventpoll.h          |  18 +++
 include/linux/syscalls.h           |   3 +
 ipc/sem.c                          |  84 ++++++++-----
 mm/maccess.c                       |  28 ++++-
 21 files changed, 332 insertions(+), 283 deletions(-)

Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-arch@vger.kernel.org
Cc: linux-mm@kvack.org
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>

Comments

Linus Walleij Nov. 6, 2020, 9:36 a.m. UTC | #1 
On Fri, Oct 30, 2020 at 4:45 PM Arnd Bergmann <arnd@kernel.org> wrote:

> This is the rebased version of my ARM set_fs patches on top of
> v5.10-rc1, dropping the TASK_SIZE_MAX patch but leaving everything
> else unchanged.
>
> I have tested the oabi-compat changes using the LTP tests for the three
> modified syscalls using an Armv7 kernel and a Debian 5 OABI user space.

I tested this patch set on the ARM Footbridge (SA110) with an ages old
Red Hat Linux OABI userspace.

It works.

Tested-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij