efi_memattr_apply_permissions
efi_memattr_apply_permissions(NULL, efi_update_mem_attr);
if (efi_memattr_apply_permissions(&efi_mm, efi_set_mapping_permissions))
if (efi_memattr_apply_permissions(&efi_mm, efi_set_mapping_permissions))
extern int efi_memattr_apply_permissions(struct mm_struct *mm,