Re: [PATCH 3/5] dma-direct: refine dma_direct_alloc zone selection

[Christoph Hellwig]

On Thu, Sep 27, 2018 at 03:30:20PM +0100, Robin Murphy wrote:
>>   +static gfp_t __dma_direct_optimal_gfp_mask(struct device *dev, u64 
>> dma_mask,
>> +		u64 *phys_mask)
>> +{
>> +	if (force_dma_unencrypted())
>> +		*phys_mask = __dma_to_phys(dev, dma_mask);
>> +	else
>> +		*phys_mask = dma_to_phys(dev, dma_mask);
>
> Maybe make phys_to_dma_direct() take u64 instead of phys_addr_t so we can 
> reuse it here?

This is a dma_to_phys and not a phys_to_dma.