On Wed, May 08, 2019 at 05:44:12PM +0300, Kirill A. Shutemov wrote: > +EXPORT_SYMBOL_GPL(__mem_encrypt_dma_set); > + > +phys_addr_t __mem_encrypt_dma_clear(phys_addr_t paddr) > +{ > + if (sme_active()) > + return __sme_clr(paddr); > + > + return paddr & ~mktme_keyid_mask; > +} > +EXPORT_SYMBOL_GPL(__mem_encrypt_dma_clear); In general nothing related to low-level dma address should ever be exposed to modules. What is your intended user for these two?