Hi Eric, I love your patch! Yet something to improve: [auto build test ERROR on iommu/next] [also build test ERROR on linus/master v5.6-rc6 next-20200320] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Eric-Auger/SMMUv3-Nested-Stage-Setup-IOMMU-part/20200321-040627 base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next config: arm-exynos_defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=9.2.0 make.cross ARCH=arm If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from drivers/gpu/drm/exynos/exynos_drm_dma.c:7: >> include/linux/dma-iommu.h:90:1: error: expected identifier or '(' before '{' token 90 | { | ^ In file included from drivers/gpu/drm/exynos/exynos_drm_dma.c:7: include/linux/dma-iommu.h:89:1: warning: 'iommu_dma_unbind_guest_msi' declared 'static' but never defined [-Wunused-function] 89 | iommu_dma_unbind_guest_msi(struct iommu_domain *domain, dma_addr_t giova); | ^~~~~~~~~~~~~~~~~~~~~~~~~~ vim +90 include/linux/dma-iommu.h 87 88 static inline void 89 iommu_dma_unbind_guest_msi(struct iommu_domain *domain, dma_addr_t giova); > 90 { 91 } 92 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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