Hi Dave I was looking in the file arm64.c at function arm64_translate_pte and saw the line: if (!page_present && (pte & PTE_FILE)) { I also saw that there are two versions of the value PTE_FILE (see also defs.h) and the following code is included in arm64.c in arm64_init: if (THIS_KERNEL_VERSION >= LINUX(3,10,0)) { machdep->machspec->pte_protnone = PTE_PROT_NONE_3_10; machdep->machspec->pte_file = PTE_FILE_3_10; } else { machdep->machspec->pte_protnone = PTE_PROT_NONE; machdep->machspec->pte_file = PTE_FILE; } So should not the first mentioned line be changed to: if (!page_present && (pte & machdep->machspec->pte_file)) { Jan Jan Karlsson Senior Software Engineer System Assurance Sony Mobile Communications Tel: +46 703 062 174 jan.karlsson@sonymobile.com<mailto:Firstname.Lastname@sonymobile.com> sonymobile.com<http://sonymobile.com/> [cid:image001.gif@01D08325.5A5F0670]