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* [PATCH v5 00/10] ARM: remove set_fs callers and implementation
@ 2021-07-26 14:11 Arnd Bergmann
  2021-07-26 14:11 ` [PATCH v5 01/10] mm/maccess: fix unaligned copy_{from,to}_kernel_nofault Arnd Bergmann
                   ` (10 more replies)
  0 siblings, 11 replies; 20+ messages in thread
From: Arnd Bergmann @ 2021-07-26 14:11 UTC (permalink / raw)
  To: Russell King
  Cc: Arnd Bergmann, linux-kernel, linux-arm-kernel, linux-arch,
	linux-mm, Alexander Viro, Linus Walleij

From: Arnd Bergmann <arnd@arndb.de>

Hi Christoph, Russell,

This is the rebased version of my ARM set_fs patches on top of
v5.14-rc2. There were a couple of minor conflicts that I resolved,
but otherwise this is still identical to the version I tested earlier.

The one notable change this time is that I rename thread_info->syscall
to thread_info->abi_syscall, to clarify that this field now contains
both the ABI bits (0x900000 for OABI, 0x000000 for EABI) in kernels
that support both, and every access to this has to mask out the bits
it needs. As Russell mentioned before, having a 'syscall' field that
not just contains the syscall number is confusing and error-prone, so
I hope this change is good enough.

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
those issues in the early versions.

Linus Walleij did additional testing of v4 on Footbridge with OABI
user space.

With this and the m68k changes getting merged, we are very close
to eliminating set_fs completely.

Russell, you can pull these from

 https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git arm-setfs_v5

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

     Arnd

v4: https://lore.kernel.org/linux-arm-kernel/20201030154519.1245983-1-arnd@kernel.org/
v3: https://lore.kernel.org/linux-arm-kernel/20201001141233.119343-1-arnd@arndb.de/
v2: https://lore.kernel.org/linux-arm-kernel/20200918124624.1469673-1-arnd@arndb.de/
v1: https://lore.kernel.org/linux-arm-kernel/20200907153701.2981205-1-arnd@arndb.de/

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->abi_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
  ARM: oabi-compat: fix oabi epoll sparse warning

 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 |   6 +-
 arch/arm/include/asm/uaccess-asm.h |   6 -
 arch/arm/include/asm/uaccess.h     | 169 ++++++++++++-----------
 arch/arm/include/uapi/asm/unistd.h |   1 +
 arch/arm/kernel/asm-offsets.c      |   3 +-
 arch/arm/kernel/entry-common.S     |  20 +--
 arch/arm/kernel/process.c          |   7 +-
 arch/arm/kernel/ptrace.c           |  14 +-
 arch/arm/kernel/signal.c           |   8 --
 arch/arm/kernel/sys_oabi-compat.c  | 214 +++++++++++++++++------------
 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 +++-
 22 files changed, 361 insertions(+), 298 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>

-- 
2.29.2



^ permalink raw reply	[flat|nested] 20+ messages in thread

end of thread, other threads:[~2023-08-09 19:43 UTC | newest]

Thread overview: 20+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-07-26 14:11 [PATCH v5 00/10] ARM: remove set_fs callers and implementation Arnd Bergmann
2021-07-26 14:11 ` [PATCH v5 01/10] mm/maccess: fix unaligned copy_{from,to}_kernel_nofault Arnd Bergmann
2021-07-26 14:11 ` [PATCH v5 02/10] ARM: traps: use get_kernel_nofault instead of set_fs() Arnd Bergmann
2021-07-26 14:11 ` [PATCH v5 03/10] ARM: oabi-compat: add epoll_pwait handler Arnd Bergmann
2021-07-26 14:11 ` [PATCH v5 04/10] ARM: syscall: always store thread_info->abi_syscall Arnd Bergmann
2023-08-03 23:17   ` Kees Cook
2023-08-04  8:13     ` Kees Cook
2023-08-09 19:42     ` Arnd Bergmann
2021-07-26 14:11 ` [PATCH v5 05/10] ARM: oabi-compat: rework epoll_wait/epoll_pwait emulation Arnd Bergmann
2021-07-26 14:11 ` [PATCH v5 06/10] ARM: oabi-compat: rework sys_semtimedop emulation Arnd Bergmann
2021-07-26 14:11 ` [PATCH v5 07/10] ARM: oabi-compat: rework fcntl64() emulation Arnd Bergmann
2021-07-26 14:11 ` [PATCH v5 08/10] ARM: uaccess: add __{get,put}_kernel_nofault Arnd Bergmann
2022-01-12 17:29   ` Daniel Thompson
     [not found]     ` <Yd8ZEbywqjXkAx9k@shell.armlinux.org.uk>
2022-01-13  9:47       ` Daniel Thompson
2022-01-13 11:14         ` Arnd Bergmann
2022-02-01 17:29           ` Daniel Thompson
2021-07-26 14:11 ` [PATCH v5 09/10] ARM: uaccess: remove set_fs() implementation Arnd Bergmann
2021-07-26 14:11 ` [PATCH v5 10/10] ARM: oabi-compat: fix oabi epoll sparse warning Arnd Bergmann
2021-08-11  6:39 ` [PATCH v5 00/10] ARM: remove set_fs callers and implementation Christoph Hellwig
2021-08-11  7:31   ` Arnd Bergmann

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