On Sun, May 24, 2026 at 11:21:33PM -0700, Christoph Hellwig wrote:
> On Fri, May 22, 2026 at 03:58:53PM -0700, T.J. Mercier wrote:
> > After commit fd55edff8a0a ("dma-buf: heaps: system: Turn the heap into a
> > module") the system dma-buf heaps can be built as a module. The
> > system_cc_shared heap uses set_memory_encrypted and set_memory_decrypted
> > but those functions are not exported on powerpc. This can result in a
> > build error like:
>
> I'd much rather revert the above commit. Yes, x86 has exported these
> since 2017, but that's a really bad idea, and we should fix it instead
> of spreading the export.
>
> Setting memory decrypted is a dangerous operations and should only
> be available to core code. We should have various allocators for
> decrypted code, but not export the functionality to random code.
At the very least an EXPORT_SYMBOL_NS.
Looks like there are about 3 modules using it already..
Jason
