[kbuild-all] drivers/iommu/sun50i-iommu.c:561:13: warning: variable 'pte_dma' set but not used

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 4a87b197c1da6b16608d5110709e0b3308e25dcd commit: 4100b8c229b328358cc4a82f5042dbf22f1c1ccb iommu: Add Allwinner H6 IOMMU driver date: 4 weeks ago :::::: branch date: 60 minutes ago :::::: commit date: 4 weeks ago config: arm-randconfig-r022-20200614 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 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 git checkout 4100b8c229b328358cc4a82f5042dbf22f1c1ccb # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): drivers/iommu/sun50i-iommu.c: In function 'sun50i_dte_get_page_table': drivers/iommu/sun50i-iommu.c:486:16: warning: unused variable 'flags' [-Wunused-variable] 486 | unsigned long flags; | ^~~~~ drivers/iommu/sun50i-iommu.c: In function 'sun50i_iommu_unmap': 561 | dma_addr_t pte_dma; | ^~~~~~~ drivers/iommu/sun50i-iommu.c:559:23: warning: unused variable 'iommu' [-Wunused-variable] 559 | struct sun50i_iommu *iommu = sun50i_domain->iommu; | ^~~~~ drivers/iommu/sun50i-iommu.c: In function 'sun50i_iommu_probe_device': drivers/iommu/sun50i-iommu.c:749:22: warning: unused variable 'group' [-Wunused-variable] 749 | struct iommu_group *group; | ^~~~~ drivers/iommu/sun50i-iommu.c: In function 'sun50i_iommu_irq': 890 | phys_addr_t iova; | ^~~~ # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git remote update linus git checkout 4100b8c229b328358cc4a82f5042dbf22f1c1ccb vim +/pte_dma +561 drivers/iommu/sun50i-iommu.c 4100b8c229b328 Maxime Ripard 2020-05-13 554 4100b8c229b328 Maxime Ripard 2020-05-13 555 static size_t sun50i_iommu_unmap(struct iommu_domain *domain, unsigned long iova, 4100b8c229b328 Maxime Ripard 2020-05-13 556 size_t size, struct iommu_iotlb_gather *gather) 4100b8c229b328 Maxime Ripard 2020-05-13 557 { 4100b8c229b328 Maxime Ripard 2020-05-13 558 struct sun50i_iommu_domain *sun50i_domain = to_sun50i_domain(domain); 4100b8c229b328 Maxime Ripard 2020-05-13 559 struct sun50i_iommu *iommu = sun50i_domain->iommu; 4100b8c229b328 Maxime Ripard 2020-05-13 560 phys_addr_t pt_phys; 4100b8c229b328 Maxime Ripard 2020-05-13 @561 dma_addr_t pte_dma; 4100b8c229b328 Maxime Ripard 2020-05-13 562 u32 *pte_addr; 4100b8c229b328 Maxime Ripard 2020-05-13 563 u32 dte; 4100b8c229b328 Maxime Ripard 2020-05-13 564 4100b8c229b328 Maxime Ripard 2020-05-13 565 dte = sun50i_domain->dt[sun50i_iova_get_dte_index(iova)]; 4100b8c229b328 Maxime Ripard 2020-05-13 566 if (!sun50i_dte_is_pt_valid(dte)) 4100b8c229b328 Maxime Ripard 2020-05-13 567 return 0; 4100b8c229b328 Maxime Ripard 2020-05-13 568 4100b8c229b328 Maxime Ripard 2020-05-13 569 pt_phys = sun50i_dte_get_pt_address(dte); 4100b8c229b328 Maxime Ripard 2020-05-13 570 pte_addr = (u32 *)phys_to_virt(pt_phys) + sun50i_iova_get_pte_index(iova); 4100b8c229b328 Maxime Ripard 2020-05-13 571 pte_dma = pt_phys + sun50i_iova_get_pte_index(iova) * PT_ENTRY_SIZE; 4100b8c229b328 Maxime Ripard 2020-05-13 572 4100b8c229b328 Maxime Ripard 2020-05-13 573 if (!sun50i_pte_is_page_valid(*pte_addr)) 4100b8c229b328 Maxime Ripard 2020-05-13 574 return 0; 4100b8c229b328 Maxime Ripard 2020-05-13 575 4100b8c229b328 Maxime Ripard 2020-05-13 576 memset(pte_addr, 0, sizeof(*pte_addr)); 4100b8c229b328 Maxime Ripard 2020-05-13 577 sun50i_table_flush(sun50i_domain, pte_addr, 1); 4100b8c229b328 Maxime Ripard 2020-05-13 578 4100b8c229b328 Maxime Ripard 2020-05-13 579 return SZ_4K; 4100b8c229b328 Maxime Ripard 2020-05-13 580 } 4100b8c229b328 Maxime Ripard 2020-05-13 581 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org _______________________________________________ kbuild mailing list -- kbuild(a)lists.01.org To unsubscribe send an email to kbuild-leave(a)lists.01.org