Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Wed, 23 Feb 2022 08:41:27 +0100
From:   Thomas Bogendoerfer <tsbogend@alpha.franken.de>
To:     Arnd Bergmann <arnd@kernel.org>
Cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        Christoph Hellwig <hch@lst.de>, linux-arch@vger.kernel.org,
        linux-mm@kvack.org, linux-api@vger.kernel.org, arnd@arndb.de,
        linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk,
        linux@armlinux.org.uk, will@kernel.org, guoren@kernel.org,
        bcain@codeaurora.org, geert@linux-m68k.org, monstr@monstr.eu,
        nickhu@andestech.com, green.hu@gmail.com, dinguyen@kernel.org,
        shorne@gmail.com, deller@gmx.de, mpe@ellerman.id.au,
        peterz@infradead.org, mingo@redhat.com, mark.rutland@arm.com,
        hca@linux.ibm.com, dalias@libc.org, davem@davemloft.net,
        richard@nod.at, x86@kernel.org, jcmvbkbc@gmail.com,
        ebiederm@xmission.com, akpm@linux-foundation.org, ardb@kernel.org,
        linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org,
        linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org,
        linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org,
        linux-mips@vger.kernel.org, openrisc@lists.librecores.org,
        linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
        linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org,
        linux-sh@vger.kernel.org, sparclinux@vger.kernel.org,
        linux-um@lists.infradead.org, linux-xtensa@linux-xtensa.org
Subject: Re: [PATCH v2 09/18] mips: use simpler access_ok()
Message-ID: <20220223074127.GA8287@alpha.franken.de>
References: <20220216131332.1489939-1-arnd@kernel.org>
 <20220216131332.1489939-10-arnd@kernel.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20220216131332.1489939-10-arnd@kernel.org>
User-Agent: Mutt/1.10.1 (2018-07-13)
Precedence: bulk

On Wed, Feb 16, 2022 at 02:13:23PM +0100, Arnd Bergmann wrote:
> diff --git a/arch/mips/include/asm/uaccess.h b/arch/mips/include/asm/uaccess.h
> index db9a8e002b62..d7c89dc3426c 100644
> --- a/arch/mips/include/asm/uaccess.h
> +++ b/arch/mips/include/asm/uaccess.h
> @@ -19,6 +19,7 @@
>  #ifdef CONFIG_32BIT
>  
>  #define __UA_LIMIT 0x80000000UL
> +#define TASK_SIZE_MAX	__UA_LIMIT

using KSEG0 instead would IMHO be the better choice. This gives the
chance to remove __UA_LIMIT completly after cleaning up ptrace.c

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]