tree: https://git.linaro.org/people/jens.wiklander/linux-tee.git testing/tuxbuild head: 64b34f1f528483a323edea85a568a5edd5c5995f commit: 563d58a2fc7eb34648cd7b57e30b15dfc03677e5 [2/9] tee: simplify shm pool handling config: sparc64-randconfig-s032-20210416 (attached as .config) compiler: sparc64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-280-g2cd6d34e-dirty git remote add jens.wiklander https://git.linaro.org/people/jens.wiklander/linux-tee.git git fetch --no-tags jens.wiklander testing/tuxbuild git checkout 563d58a2fc7eb34648cd7b57e30b15dfc03677e5 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=sparc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) vim +17 drivers/tee/tee_shm_pool.c 11 12 static int pool_op_gen_alloc(struct tee_shm_pool_mgr *poolm, 13 struct tee_shm *shm, size_t size, size_t align) 14 { 15 unsigned long va; 16 struct gen_pool *genpool = poolm->private_data; 18 struct genpool_data_align data = { .align = a }; 19 size_t s = roundup(size, a); 20 21 va = gen_pool_alloc_algo(genpool, s, gen_pool_first_fit_align, &data); 22 if (!va) 23 return -ENOMEM; 24 25 memset((void *)va, 0, s); 26 shm->kaddr = (void *)va; 27 shm->paddr = gen_pool_virt_to_phys(genpool, va); 28 shm->size = s; 29 /* 30 * This is from a static shared memory pool so no need to register 31 * each chunk, and no need to unregister later either. 32 */ 33 shm->flags &= ~TEE_SHM_REGISTER; 34 return 0; 35 } 36 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org