On 06/12/18 14:21, lantianyu1986@xxxxxxxxx wrote: > static inline int hyperv_flush_guest_mapping(u64 as) { return -1; } > +static inline int hyperv_flush_guest_mapping_range(u64 as, > + hyperv_fill_flush_list_func fill_func, void *data); > +{ > + return -1; This part for !IS_ENABLED(CONFIG_HYPERV) does not compile. No big deal, but please add that to your testing procedures. Paolo