On Wed, Aug 19, 2020 at 12:22:05PM +0800, Coly Li wrote: > On 2020/8/19 03:49, Christoph Hellwig wrote: > > On Wed, Aug 19, 2020 at 12:33:37AM +0800, Coly Li wrote: > >> On 2020/8/19 00:24, Christoph Hellwig wrote: > >>> I think we should go for something simple like this instead: > >> > >> This idea is fine to me. Should a warning message be through here? IMHO > >> the driver still sends an improper page in, fix it in silence is too > >> kind or over nice to the buggy driver(s). > > > > I don't think a warning is a good idea. An API that does the right > > thing underneath and doesn't require boiler plate code in most callers > > is the right API. > > > > Then I don't have more comment. So given the feedback from Dave I suspect we should actually resurrect this series, sorry for the noise. And in this case I think we do need the warning in kernel_sendpage.