Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Thu, 22 Jul 2021 15:02:09 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Arnd Bergmann <arnd@kernel.org>
Cc:     linux-arch@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
        "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
        Al Viro <viro@zeniv.linux.org.uk>,
        Anton Ivanov <anton.ivanov@cambridgegreys.com>,
        Brian Cain <bcain@codeaurora.org>,
        Chris Zankel <chris@zankel.net>,
        Christian Borntraeger <borntraeger@de.ibm.com>,
        Christoph Hellwig <hch@lst.de>, Guo Ren <guoren@kernel.org>,
        Heiko Carstens <hca@linux.ibm.com>,
        Helge Deller <deller@gmx.de>, Jeff Dike <jdike@addtoit.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        Max Filippov <jcmvbkbc@gmail.com>,
        Michal Simek <monstr@monstr.eu>,
        Richard Weinberger <richard@nod.at>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        Vasily Gorbik <gor@linux.ibm.com>,
        Vineet Gupta <vgupta@synopsys.com>,
        Yoshinori Sato <ysato@users.sourceforge.jp>,
        linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org,
        linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org,
        linux-s390@vger.kernel.org, linux-snps-arc@lists.infradead.org,
        linux-um@lists.infradead.org, linux-xtensa@linux-xtensa.org,
        uclinux-h8-devel@lists.sourceforge.jp,
        Geert Uytterhoeven <geert@linux-m68k.org>
Subject: Re: [PATCH v3 7/9] asm-generic: uaccess: remove inline
 strncpy_from_user/strnlen_user
Message-ID: <20210722130209.GG26225@lst.de>
References: <20210722124814.778059-1-arnd@kernel.org> <20210722124814.778059-8-arnd@kernel.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20210722124814.778059-8-arnd@kernel.org>
User-Agent: Mutt/1.5.17 (2007-11-01)
Precedence: bulk

On Thu, Jul 22, 2021 at 02:48:12PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> The inline version is used on three NOMMU architectures and is
> particularly inefficient when it scans the string one byte at a time
> twice. It also lacks a check for user_addr_max(), but this is
> probably ok on NOMMU targets.
> 
> Consolidate the asm-generic implementation with the library version
> that is used everywhere else.  This version is generalized enough to
> work efficiently on both MMU and NOMMU targets, and using the
> same code everywhere reduces the potential for subtle bugs.
> 
> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Looks good,

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