On Fri 2019-07-19 05:00:43, Christoph Hellwig wrote: > On Fri, Jul 19, 2019 at 08:48:53AM -0300, Jason Gunthorpe wrote: > > It is like MMU_NOTIFIERS, if something needs it, then it will select > > it. > > > > Maybe it should just be a hidden kconfig anyhow as there is no reason > > to turn it on without also turning on a using driver. > > We can't just select it due to the odd X86_64 || PPC64 dependency. > > Which also answers Pavels question: you never really need it, as we > can only use it for optional functionality due to that.
Okay, just explain it in the help text :-)..
Alternatively... you can have WANT_HMM_MIRROR option drivers select,
and option HMM_MIRROR which is yes if WANT_HMM_MIRROR && (X86_64 ||
PPC64), no?
Pavel
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