Re: [PATCH v3 4/9] arc: use generic strncpy/strnlen from_user

[PATCH v3 0/6] asm-generic: strncpy_from_user/strnlen_user cleanup · Arnd Bergmann <arnd@kernel.org> · 2021-07-22
[PATCH v3 1/9] asm-generic/uaccess.h: remove __strncpy_from_user/__strnlen_user · Arnd Bergmann <arnd@kernel.org> · 2021-07-22
Re: [PATCH v3 1/9] asm-generic/uaccess.h: remove __strncpy_from_user/__strnlen_user · Christoph Hellwig <hch@lst.de> · 2021-07-22
[PATCH v3 2/9] h8300: remove stale strncpy_from_user · Arnd Bergmann <arnd@kernel.org> · 2021-07-22
Re: [PATCH v3 2/9] h8300: remove stale strncpy_from_user · Christoph Hellwig <hch@lst.de> · 2021-07-22
[PATCH v3 3/9] hexagon: use generic strncpy/strnlen from_user · Arnd Bergmann <arnd@kernel.org> · 2021-07-22
Re: [PATCH v3 3/9] hexagon: use generic strncpy/strnlen from_user · Christoph Hellwig <hch@lst.de> · 2021-07-22
[PATCH v3 4/9] arc: use generic strncpy/strnlen from_user · Arnd Bergmann <arnd@kernel.org> · 2021-07-22
Re: [PATCH v3 4/9] arc: use generic strncpy/strnlen from_user · Christoph Hellwig <hch@lst.de> · 2021-07-22
Re: [PATCH v3 4/9] arc: use generic strncpy/strnlen from_user · Vineet Gupta <hidden> · 2021-07-22
[PATCH v3 5/9] csky: use generic strncpy/strnlen from_user · Arnd Bergmann <arnd@kernel.org> · 2021-07-22
Re: [PATCH v3 5/9] csky: use generic strncpy/strnlen from_user · Christoph Hellwig <hch@lst.de> · 2021-07-22
[PATCH v3 6/9] microblaze: use generic strncpy/strnlen from_user · Arnd Bergmann <arnd@kernel.org> · 2021-07-22
Re: [PATCH v3 6/9] microblaze: use generic strncpy/strnlen from_user · Christoph Hellwig <hch@lst.de> · 2021-07-22
[PATCH v3 7/9] asm-generic: uaccess: remove inline strncpy_from_user/strnlen_user · Arnd Bergmann <arnd@kernel.org> · 2021-07-22
Re: [PATCH v3 7/9] asm-generic: uaccess: remove inline strncpy_from_user/strnlen_user · Christoph Hellwig <hch@lst.de> · 2021-07-22
[PATCH v3 9/9] asm-generic: reverse GENERIC_{STRNCPY_FROM,STRNLEN}_USER symbols · Arnd Bergmann <arnd@kernel.org> · 2021-07-22
Re: [PATCH v3 9/9] asm-generic: reverse GENERIC_{STRNCPY_FROM,STRNLEN}_USER symbols · Christoph Hellwig <hch@lst.de> · 2021-07-22
Re: [PATCH v3 9/9] asm-generic: reverse GENERIC_{STRNCPY_FROM, STRNLEN}_USER symbols · Johannes Berg <johannes@sipsolutions.net> · 2021-07-22
Re: [PATCH v3 9/9] asm-generic: reverse GENERIC_{STRNCPY_FROM, STRNLEN}_USER symbols · Arnd Bergmann <arnd@kernel.org> · 2021-07-22
Re: [PATCH v3 9/9] asm-generic: reverse GENERIC_{STRNCPY_FROM, STRNLEN}_USER symbols · Heiko Carstens <hca@linux.ibm.com> · 2021-07-22
Re: [PATCH v3 9/9] asm-generic: reverse GENERIC_{STRNCPY_FROM, STRNLEN}_USER symbols · Arnd Bergmann <arnd@kernel.org> · 2021-07-23
Re: [PATCH v3 9/9] asm-generic: reverse GENERIC_{STRNCPY_FROM,STRNLEN}_USER symbols · Geert Uytterhoeven <geert@linux-m68k.org> · 2021-07-24
Re: [PATCH v3 9/9] asm-generic: reverse GENERIC_{STRNCPY_FROM,STRNLEN}_USER symbols · Helge Deller <deller@gmx.de> · 2021-07-26
[PATCH v3 8/9] asm-generic: remove extra strn{cpy_from,len}_user declarations · Arnd Bergmann <arnd@kernel.org> · 2021-07-22
Re: [PATCH v3 8/9] asm-generic: remove extra strn{cpy_from,len}_user declarations · Christoph Hellwig <hch@lst.de> · 2021-07-22

From: Christoph Hellwig <hch@lst.de>
Date: 2021-07-22 13:01:13
Also in: linux-arch, linux-s390, linux-um, lkml

On Thu, Jul 22, 2021 at 02:48:09PM +0200, Arnd Bergmann wrote:

From: Arnd Bergmann <arnd@arndb.de>

Remove the arc implemenation of strncpy/strnlen and instead use the
generic versions.  The arc version is fairly slow because it always does
byte accesses even for aligned data, and its checks for user_addr_max()
differ from the generic code.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Looks good,

Reviewed-by: Christoph Hellwig <hch@lst.de>

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