On Wed 10-04-19 09:38:23, Pankaj Gupta wrote: > @@ -64,6 +65,10 @@ static inline bool dax_write_cache_enabled(struct dax_device *dax_dev) > { > return false; > } > +static inline bool dax_synchronous(struct dax_device *dax_dev) > +{ > + return true; > +} Is there a need to define dax_synchronous() for !CONFIG_DAX? Because that property of dax device is pretty much undefined and I don't see anything needing to call it for !CONFIG_DAX... Honza -- Jan Kara <jack@xxxxxxxx> SUSE Labs, CR