Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH 1/4] mm/hmm: make full use of walk_page_range()
To:     Christoph Hellwig <hch@lst.de>
CC:     <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>,
        <amd-gfx@lists.freedesktop.org>, <dri-devel@lists.freedesktop.org>,
        <nouveau@lists.freedesktop.org>,
        =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= <jglisse@redhat.com>,
        Jason Gunthorpe <jgg@mellanox.com>,
        Andrew Morton <akpm@linux-foundation.org>
References: <20190911222829.28874-1-rcampbell@nvidia.com>
 <20190911222829.28874-2-rcampbell@nvidia.com> <20190912082613.GA14368@lst.de>
From:   Ralph Campbell <rcampbell@nvidia.com>
Message-ID: <973b7159-513f-0776-668d-8ba1adf87f1c@nvidia.com>
Date:   Thu, 12 Sep 2019 10:16:51 -0700
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101
 Thunderbird/60.7.0
MIME-Version: 1.0
In-Reply-To: <20190912082613.GA14368@lst.de>
Content-Type: text/plain; charset="utf-8"; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk


On 9/12/19 1:26 AM, Christoph Hellwig wrote:
>> +static int hmm_pfns_fill(unsigned long addr,
>> +			 unsigned long end,
>> +			 struct hmm_range *range,
>> +			 enum hmm_pfn_value_e value)
> 
> Nit: can we use the space a little more efficient, e.g.:
> 
> static int hmm_pfns_fill(unsigned long addr, unsigned long end,
> 		struct hmm_range *range, enum hmm_pfn_value_e value)
> 
>> +static int hmm_vma_walk_test(unsigned long start,
>> +			     unsigned long end,
>> +			     struct mm_walk *walk)
> 
> Same here.
> 
>> +	if (!(vma->vm_flags & VM_READ)) {
>> +		(void) hmm_pfns_fill(start, end, range, HMM_PFN_NONE);
> 
> There should be no need for the void cast here.
> 

OK. I'll post a v2 with the these changes.
Thanks for the reviews.