On Sun, Mar 28, 2021 at 03:06:40AM +0800, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > master > head: 0f4498cef9f5cd18d7c6639a2a902ec1edc5be4e > commit: 179209fa12709a3df8888c323b37315da2683c24 vfio: IOMMU_API should be > selected > date: 11 days ago > config: powerpc64-randconfig-r031-20210328 (attached as .config) > compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project > d50fe9f0d6b9ee61df8830a67ea0a33c27a637e7) > reproduce (this is a W=1 build): > wget > https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O > ~/bin/make.cross > chmod +x ~/bin/make.cross > # install powerpc64 cross compiling tool for clang build > # apt-get install binutils-powerpc64-linux-gnu > # > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=179209fa12709a3df8888c323b37315da2683c24 > git remote add linus > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > git fetch --no-tags linus master > git checkout 179209fa12709a3df8888c323b37315da2683c24 > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross > ARCH=powerpc64 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <[email protected]> > > All errors (new ones prefixed by >>): > > >> drivers/vfio/pci/vfio_pci_nvlink2.c:101:10: error: implicit declaration of > >> function 'mm_iommu_put' [-Werror,-Wimplicit-function-declaration] > ret = mm_iommu_put(data->mm, data->mem); > ^ > drivers/vfio/pci/vfio_pci_nvlink2.c:101:10: note: did you mean > 'mm_iommu_init'? > arch/powerpc/include/asm/mmu_context.h:57:20: note: 'mm_iommu_init' > declared here > static inline void mm_iommu_init(struct mm_struct *mm) { } > ^ > >> drivers/vfio/pci/vfio_pci_nvlink2.c:165:14: error: implicit declaration of > >> function 'mm_iommu_newdev' [-Werror,-Wimplicit-function-declaration] > ret = (int) mm_iommu_newdev(data->mm, data->useraddr, > ^ > 2 errors generated.
This is because of a missing CONFIG_SPAPR_TCE_IOMMU combined incomplete function stubbing in arch/powerpc/include/asm/mmu_context.h I'll send a patch to 'add && SPAPR_TCE_IOMMU' to 'config VFIO_PCI_NVLINK2' (it is interesting we are seeing these now as these patches sat on my github which is linked to 0-day too for quite a long time) Jason
