Hi Bibek, kernel test robot noticed the following build warnings: [auto build test WARNING on linus/master] [also build test WARNING on joro-iommu/next v6.12-rc7 next-20241113] [cannot apply to arm64/for-next/core] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Bibek-Kumar-Patro/iommu-arm-smmu-re-enable-context-caching-in-smmu-reset-operation/20241113-042646 base: linus/master patch link: https://lore.kernel.org/r/20241112165454.2698269-2-quic_bibekkum%40quicinc.com patch subject: [PATCH v17 1/5] iommu/arm-smmu: re-enable context caching in smmu reset operation config: powerpc64-randconfig-r064-20241114 (https://download.01.org/0day-ci/archive/20241114/202411140748.6mcFdJdO-lkp@xxxxxxxxx/config) compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 592c0fe55f6d9a811028b5f3507be91458ab2713) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241114/202411140748.6mcFdJdO-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202411140748.6mcFdJdO-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from drivers/iommu/arm/arm-smmu/arm-smmu-impl.c:10: In file included from drivers/iommu/arm/arm-smmu/arm-smmu.h:18: In file included from include/linux/io-64-nonatomic-hi-lo.h:5: In file included from include/linux/io.h:14: In file included from arch/powerpc/include/asm/io.h:24: In file included from include/linux/mm.h:2213: include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ >> drivers/iommu/arm/arm-smmu/arm-smmu-impl.c:113:6: warning: unused variable 'i' [-Wunused-variable] 113 | int i; | ^ 2 warnings generated. vim +/i +113 drivers/iommu/arm/arm-smmu/arm-smmu-impl.c 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 109 759aaa10c76cba drivers/iommu/arm-smmu-impl.c Vivek Gautam 2019-09-20 110 int arm_mmu500_reset(struct arm_smmu_device *smmu) 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 111 { 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 112 u32 reg, major; 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 @113 int i; 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 114 /* 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 115 * On MMU-500 r2p0 onwards we need to clear ACR.CACHE_LOCK before 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 116 * writes to the context bank ACTLRs will stick. And we just hope that 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 117 * Secure has also cleared SACR.CACHE_LOCK for this to take effect... 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 118 */ 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 119 reg = arm_smmu_gr0_read(smmu, ARM_SMMU_GR0_ID7); fba6e960772b7b drivers/iommu/arm-smmu-impl.c Will Deacon 2020-01-10 120 major = FIELD_GET(ARM_SMMU_ID7_MAJOR, reg); 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 121 reg = arm_smmu_gr0_read(smmu, ARM_SMMU_GR0_sACR); 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 122 if (major >= 2) 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 123 reg &= ~ARM_MMU500_ACR_CACHE_LOCK; 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 124 /* 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 125 * Allow unmatched Stream IDs to allocate bypass 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 126 * TLB entries for reduced latency. 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 127 */ 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 128 reg |= ARM_MMU500_ACR_SMTNMB_TLBEN | ARM_MMU500_ACR_S2CRB_TLBEN; 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 129 arm_smmu_gr0_write(smmu, ARM_SMMU_GR0_sACR, reg); 62b993a36e4c2d drivers/iommu/arm-smmu-impl.c Robin Murphy 2019-08-15 130 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
