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Date: Thu, 11 Sep 2014 08:03:25 -0700
From: Dave Hansen <dave.hansen@intel.com>
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To: Qiaowei Ren <qiaowei.ren@intel.com>, "H. Peter Anvin" <hpa@zytor.com>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>
CC: x86@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v8 08/10] x86, mpx: add prctl commands PR_MPX_REGISTER,
 PR_MPX_UNREGISTER
References: <1410425210-24789-1-git-send-email-qiaowei.ren@intel.com> <1410425210-24789-9-git-send-email-qiaowei.ren@intel.com>
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On 09/11/2014 01:46 AM, Qiaowei Ren wrote:
> +
> +	return (void __user *)(unsigned long)(xsave_buf->bndcsr.cfg_reg_u &
> +			MPX_BNDCFG_ADDR_MASK);
> +}

I don't think casting a u64 to a ulong, then to a pointer is useful.
Just take the '(unsigned long)' out.