Hi Jason, On Tue, Apr 24, 2018 at 05:56:39PM +0200, Jason A. Donenfeld wrote: > On Tue, Apr 24, 2018 at 5:40 PM, Will Deacon <will.deacon@xxxxxxx> wrote: > > On Tue, Apr 24, 2018 at 03:43:04PM +0200, Jason A. Donenfeld wrote: > >> On Tue, Apr 24, 2018 at 3:34 PM, Will Deacon <will.deacon@xxxxxxx> wrote: > >> > I've not run into any build issues here -- is this specifically with some > >> > out-of-tree module? > >> > >> I received a bug report email about this. I'm not sure which specific > >> module, and I assumed from the email that it was actually a result of > >> in-tree configuration options rather than an out-of-tree module, but > >> I'm not sure exactly. Either way, I was able to reproduce the problem > >> by coding up a little PoC out-of-tree module, so it is certainly a > >> real problem. > > > > Any chance you could share the module, please? I tried to write one but > > the compiler just inlines the __in128 arithmetic. > > Sure. I didn't save my original but just cooked a new one up and > verified it errors out. The below will get these errors on mainline > when compiled as a module, even as an in-tree module: Thanks for sharing the module source, I can reproduce the issue on my machine. Putting both the prototype and the EXPORT_SYMBOL in arm64ksyms.c appears to resolve the issue and is my preference since these functions shouldn't be called directly anyway. Would you be able to spin a v2 doing that, please? I can take it as fix. I've also queued your clang int128 patch. Cheers, Will