[PATCH 0/6] [v2] asm-generic: strncpy_from_user/strnlen_user cleanup

Arnd Bergmann arnd at kernel.org
Sat May 15 03:17:57 PDT 2021

From: Arnd Bergmann <arnd at arndb.de>

As I've queued up some patches for asm-generic, I remembered an
older series that I created but never submitted.

These two functions appear to be unnecessarily different between
architectures, and the asm-generic version is a bit questionable,
even for NOMMU architectures.

Clean this up to just use the generic library version for anything
that uses the generic version today. I've expanded on the patch
descriptions a little, as suggested by Christoph Hellwig, but I
suspect a more detailed review would uncover additional problems
with the custom versions that are getting removed.


Arnd Bergmann (6):
  [v2] asm-generic/uaccess.h: remove __strncpy_from_user/__strnlen_user
  [v2] h8300: remove stale strncpy_from_user
  [v2] hexagon: use generic strncpy/strnlen from_user
  [v2] arc: use generic strncpy/strnlen from_user
  [v2] asm-generic: uaccess: remove inline
  [v2] asm-generic: remove extra strn{cpy_from,len}_user declarations

 arch/arc/Kconfig                    |   2 +
 arch/arc/include/asm/uaccess.h      |  72 ----------------
 arch/arc/mm/extable.c               |  12 ---
 arch/h8300/Kconfig                  |   2 +
 arch/h8300/kernel/h8300_ksyms.c     |   2 -
 arch/h8300/lib/Makefile             |   2 +-
 arch/h8300/lib/strncpy.S            |  35 --------
 arch/hexagon/Kconfig                |   2 +
 arch/hexagon/include/asm/uaccess.h  |  31 -------
 arch/hexagon/kernel/hexagon_ksyms.c |   1 -
 arch/hexagon/mm/Makefile            |   2 +-
 arch/hexagon/mm/strnlen_user.S      | 126 ----------------------------
 arch/m68k/Kconfig                   |   4 +-
 arch/riscv/Kconfig                  |   4 +-
 arch/um/include/asm/uaccess.h       |   5 +-
 arch/um/kernel/skas/uaccess.c       |   5 +-
 include/asm-generic/uaccess.h       |  52 ++----------
 17 files changed, 25 insertions(+), 334 deletions(-)
 delete mode 100644 arch/h8300/lib/strncpy.S
 delete mode 100644 arch/hexagon/mm/strnlen_user.S


Cc: Christoph Hellwig <hch at lst.de>
Cc: Al Viro <viro at zeniv.linux.org.uk>
Cc: Vineet Gupta <vgupta at synopsys.com>
Cc: Yoshinori Sato <ysato at users.sourceforge.jp>
Cc: Brian Cain <bcain at codeaurora.org>
Cc: Geert Uytterhoeven <geert at linux-m68k.org>
Cc: Paul Walmsley <paul.walmsley at sifive.com>
Cc: Palmer Dabbelt <palmer at dabbelt.com>
Cc: Albert Ou <aou at eecs.berkeley.edu>
Cc: Jeff Dike <jdike at addtoit.com>
Cc: Richard Weinberger <richard at nod.at>
Cc: Anton Ivanov <anton.ivanov at cambridgegreys.com>
Cc: Arnd Bergmann <arnd at arndb.de>
Cc: Sid Manning <sidneym at codeaurora.org>
Cc: Andrew Morton <akpm at linux-foundation.org>
Cc: Mike Rapoport <rppt at kernel.org>
Cc: linux-snps-arc at lists.infradead.org
Cc: linux-kernel at vger.kernel.org
Cc: uclinux-h8-devel at lists.sourceforge.jp
Cc: linux-hexagon at vger.kernel.org
Cc: linux-m68k at lists.linux-m68k.org
Cc: linux-riscv at lists.infradead.org
Cc: linux-um at lists.infradead.org
Cc: linux-arch at vger.kernel.org

More information about the linux-riscv mailing list