From mboxrd@z Thu Jan  1 00:00:00 1970
From: Catalin Marinas <catalin.marinas@arm.com>
Subject: Re: [PATCH v15 05/17] arms64: untag user pointers passed to memory
 syscalls
Date: Sat, 25 May 2019 10:57:55 +0100
Message-ID: <20190525095753.caehqipafdc5m3yp@mbp>
References: <cover.1557160186.git.andreyknvl@google.com>
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To: Andrey Konovalov <andreyknvl@google.com>
Cc: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, Vincenzo Frascino <vincenzo.frascino@arm.com>, Will Deacon <will.deacon@arm.com>, Mark Rutland <mark.rutland@arm.com>, Andrew Morton <akpm@linux-foundation.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Kees Cook <keescook@chromium.org>, Yishai Hadas <yishaih@mellanox.com>, Felix Kuehling <Felix.Kuehling@amd.com>, Alexander Deucher <Alexander.Deucher@amd.com>, Christian Koenig <Christian.Koenig@amd.com>, Mauro Carvalho Chehab <mchehab@kernel.org>, Jens Wiklander <jens.wiklander@linaro.org>
List-Id: linux-rdma@vger.kernel.org

On Mon, May 06, 2019 at 06:30:51PM +0200, Andrey Konovalov wrote:
> +SYSCALL_DEFINE5(arm64_get_mempolicy, int __user *, policy,
> +		unsigned long __user *, nmask, unsigned long, maxnode,
> +		unsigned long, addr, unsigned long, flags)
> +{
> +	addr = untagged_addr(addr);
> +	return ksys_get_mempolicy(policy, nmask, maxnode, addr, flags);
> +}
[...]
> +SYSCALL_DEFINE6(arm64_mbind, unsigned long, start, unsigned long, len,
> +		unsigned long, mode, const unsigned long __user *, nmask,
> +		unsigned long, maxnode, unsigned int, flags)
> +{
> +	start = untagged_addr(start);
> +	return ksys_mbind(start, len, mode, nmask, maxnode, flags);
> +}

The kernel fails to build with CONFIG_NUMA disabled because the above
are in mm/mempolicy.c which is no longer compiled in.

-- 
Catalin