On Tue, Dec 03, 2019 at 08:54:46AM +0100, Thomas Hellström (VMware) wrote: > From: Thomas Hellstrom <thellstrom@xxxxxxxxxx> > > We were using an ugly hack to set the page protection correctly. > Fix that and instead use vmf_insert_mixed_prot() and / or > vmf_insert_pfn_prot(). > Also get the default page protection from > struct vm_area_struct::vm_page_prot rather than using vm_get_page_prot(). > This way we catch modifications done by the vm system for drivers that > want write-notification. Hm. Why doesn't your VMA have the right prot flags in the first place? Why do you need to override them? More context, please. -- Kirill A. Shutemov
