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Commiteeb934137d("iommu/amd: Report SEV-TIO support") was confused about the config options that expose amd_iommu_sev_tio_supported(), and made the declaration (and alternative dummy function) conditional on the CONFIG_AMD_IOMMU config option. But the code is actually dependent on CONFIG_KVM_AMD_SEV, resulting in ERROR: modpost: "amd_iommu_sev_tio_supported" [drivers/crypto/ccp/ccp.ko] undefined! make[2]: *** [scripts/Makefile.modpost:147: Module.symvers] Error 1 if you have the AMD iommu enabled, but don't enable KVM_AMD_SEV support. Fix it by moving the declaration into the right #ifdef section in the header file. Fixes:eeb934137d("iommu/amd: Report SEV-TIO support") Cc: Alexey Kardashevskiy <aik@amd.com> Cc: Joerg Roedel <joerg.roedel@amd.com> Cc: Vasant Hegde <vasant.hegde@amd.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>