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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>,
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References: <20190911222829.28874-1-rcampbell@nvidia.com>
 <20190911222829.28874-2-rcampbell@nvidia.com> <20190912082613.GA14368@lst.de>
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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.