On Fri, Aug 09, 2019 at 03:58:29PM -0700, ira.weiny@xxxxxxxxx wrote: > From: Ira Weiny <ira.weiny@xxxxxxxxx> > > The addition of FOLL_LONGTERM has taken on additional meaning for CMA > pages. > > In addition subsystems such as RDMA require new information to be passed > to the GUP interface to track file owning information. As such a simple > FOLL_LONGTERM flag is no longer sufficient for these users to pin pages. > > Introduce a new GUP like call which takes the newly introduced vaddr_pin > information. Failure to pass the vaddr_pin object back to a vaddr_put* > call will result in a failure if pins were created on files during the > pin operation. Is this a 'vaddr' in the traditional sense, ie does it work with something returned by valloc? Maybe another name would be better? I also wish GUP like functions took in a 'void __user *' instead of the unsigned long to make this clear :\ Jason
