Re: [PATCH v2 18/18] uaccess: drop maining CONFIG_SET_FS users

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On 2/16/22 07:13, Arnd Bergmann wrote:
From: Arnd Bergmann <arnd@xxxxxxxx>

There are no remaining callers of set_fs(), so CONFIG_SET_FS
can be removed globally, along with the thread_info field and
any references to it.

This turns access_ok() into a cheaper check against TASK_SIZE_MAX.

With CONFIG_SET_FS gone, so drop all remaining references to
set_fs()/get_fs(), mm_segment_t and uaccess_kernel().

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
  arch/Kconfig                              |  3 -
  arch/alpha/Kconfig                        |  1 -
  arch/alpha/include/asm/processor.h        |  4 --
  arch/alpha/include/asm/thread_info.h      |  2 -
  arch/alpha/include/asm/uaccess.h          | 19 ------
  arch/arc/Kconfig                          |  1 -
  arch/arc/include/asm/segment.h            | 20 -------
  arch/arc/include/asm/thread_info.h        |  3 -
  arch/arc/include/asm/uaccess.h            |  1 -
  arch/arm/lib/uaccess_with_memcpy.c        | 10 ----
  arch/csky/Kconfig                         |  1 -
  arch/csky/include/asm/processor.h         |  2 -
  arch/csky/include/asm/segment.h           | 10 ----
  arch/csky/include/asm/thread_info.h       |  2 -
  arch/csky/include/asm/uaccess.h           |  3 -
  arch/csky/kernel/asm-offsets.c            |  1 -
  arch/h8300/Kconfig                        |  1 -
  arch/h8300/include/asm/processor.h        |  1 -
  arch/h8300/include/asm/segment.h          | 40 -------------
  arch/h8300/include/asm/thread_info.h      |  3 -
  arch/h8300/kernel/entry.S                 |  1 -
  arch/h8300/kernel/head_ram.S              |  1 -
  arch/h8300/mm/init.c                      |  6 --
  arch/h8300/mm/memory.c                    |  1 -
  arch/hexagon/Kconfig                      |  1 -
  arch/hexagon/include/asm/thread_info.h    |  6 --
  arch/hexagon/kernel/process.c             |  1 -
  arch/microblaze/Kconfig                   |  1 -
  arch/microblaze/include/asm/thread_info.h |  6 --
  arch/microblaze/include/asm/uaccess.h     | 24 --------
  arch/microblaze/kernel/asm-offsets.c      |  1 -
  arch/microblaze/kernel/process.c          |  1 -
  arch/nds32/Kconfig                        |  1 -
  arch/nds32/include/asm/thread_info.h      |  4 --
  arch/nds32/include/asm/uaccess.h          | 15 +----
  arch/nds32/kernel/process.c               |  5 +-
  arch/nds32/mm/alignment.c                 |  3 -
  arch/nios2/Kconfig                        |  1 -
  arch/nios2/include/asm/thread_info.h      |  9 ---
  arch/nios2/include/asm/uaccess.h          | 12 ----

For NIOS2:

Acked-by: Dinh Nguyen <dinguyen@xxxxxxxxxx>



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