On Wed, Oct 22, 2014 at 02:53:04PM +0300, Kirill A. Shutemov wrote: > Em, no. In this case change_protection() will not touch the pte, since > it's pte_none() and the pte_same() check will pass just fine. Oh, that's what you meant. Yes that's a problem, yes vm_page_prot needs wrapping too. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>