Re: [PATCH v2] mm/hmm: bypass devmap pte when all pfn requested flags are fulfilled

On 30/08/2021 15:32, Christoph Hellwig wrote:

On Sat, Aug 28, 2021 at 09:04:41AM +0800, Li Zhijian wrote:

quoted

+	if (!pte_devmap(pte) && pte_special(pte) &&
+	    !is_zero_pfn(pte_pfn(pte))) {

Maybe this is a little too superficial and nitpicky, but I find the
ordering of the checks a little strange.  Why not do the pte_special
first and then the exlusions from it later?

It sounds good to me, let's update it

Thanks
Zhijian