tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 118b4e18ae4e19cd4e1245306fe243d21aee3d82 commit: 0db2fc397b9d432df0233d7bed29df427df74aac [3415/3415] iommu/ummu: Support UMMU device config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20251202/202512020558.hXS2BgSg-lkp@i...) compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251202/202512020558.hXS2BgSg-lkp@i...) 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@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512020558.hXS2BgSg-lkp@intel.com/ All warnings (new ones prefixed by >>):

...

drivers/iommu/hisilicon/ummu_main.c:267:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] 267 | default: | ^ drivers/iommu/hisilicon/ummu_main.c:267:2: note: insert 'break;' to avoid fall-through 267 | default: | ^ | break; drivers/iommu/hisilicon/ummu_main.c:280:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] 280 | default: | ^ drivers/iommu/hisilicon/ummu_main.c:280:2: note: insert 'break;' to avoid fall-through 280 | default: | ^ | break; 2 warnings generated.

vim +267 drivers/iommu/hisilicon/ummu_main.c 258 259 static void ummu_device_get_stall_model(struct ummu_device *ummu, u32 reg) 260 { 261 switch (FIELD_GET(CAP3_STALL_MODEL_MASK, reg)) { 262 case CAP3_STALL_MODE_FORCE: 263 ummu->cap.features |= UMMU_FEAT_STALL_FORCE; 264 fallthrough; 265 case CAP3_STALL_MODE: 266 ummu->cap.features |= UMMU_FEAT_STALLS;

267 default: 268 break; 269 } 270 } 271

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