From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ren Qiaowei <qiaowei.ren@intel.com>
Date: Tue, 28 Oct 2014 05:57:16 +0000
Subject: Re: [PATCH v9 10/12] x86, mpx: add prctl commands PR_MPX_ENABLE_MANAGEMENT, PR_MPX_DISABLE_MANAGEMEN
Message-Id: <544F303C.10903@intel.com>
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To: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>, "Hansen, Dave" <dave.hansen@intel.com>, "x86@kernel.org" <x86@kernel.org>, "linux-mm@kvack.org" <linux-mm@kvack.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-ia64@vger.kernel.org" <linux-ia64@vger.kernel.org>, "linux-mips@linux-mips.org" <linux-mips@linux-mips.org>

On 10/28/2014 04:38 AM, Thomas Gleixner wrote:
> On Mon, 27 Oct 2014, Ren, Qiaowei wrote:
>> On 2014-10-24, Thomas Gleixner wrote:
>>> On Sun, 12 Oct 2014, Qiaowei Ren wrote:
>>>> +int mpx_enable_management(struct task_struct *tsk) {
>>>> +	struct mm_struct *mm = tsk->mm;
>>>> +	void __user *bd_base = MPX_INVALID_BOUNDS_DIR;
>>>
>>> What's the point of initializing bd_base here. I had to look twice to
>>> figure out that it gets overwritten by task_get_bounds_dir()
>>>
>>
>> I just want to put task_get_bounds_dir() outside mm->mmap_sem holding.
>
> What you want is not interesting at all. What's interesting is what
> you do and what you send for review.
>

I see. Thanks.

- Qiaowei