Hi Bob, Thank you for the patch! Yet something to improve: [auto build test ERROR on rdma/for-next] [also build test ERROR on next-20200814] [cannot apply to v5.8] [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] url: https://github.com/0day-ci/linux/commits/Bob-Pearson/Added-ib_uverbs_wc_o... base: https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git for-next config: xtensa-allyesconfig (attached as .config) compiler: xtensa-linux-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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=xtensa If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from include/linux/kernel.h:11, from include/linux/list.h:9, from include/linux/module.h:12, from drivers/infiniband/sw/rxe/rxe.h:17, from drivers/infiniband/sw/rxe/rxe_mw.c:10: include/linux/scatterlist.h: In function 'sg_set_buf': arch/xtensa/include/asm/page.h:193:9: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] 193 | ((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr) | ^~ include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' 78 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/linux/scatterlist.h:143:2: note: in expansion of macro 'BUG_ON' 143 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~ arch/xtensa/include/asm/page.h:201:32: note: in expansion of macro 'pfn_valid' 201 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | ^~~~~~~~~ include/linux/scatterlist.h:143:10: note: in expansion of macro 'virt_addr_valid' 143 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~~~~~~~~~~ In file included from ./arch/xtensa/include/generated/asm/bug.h:1, from include/linux/bug.h:5, from include/linux/thread_info.h:12, from include/asm-generic/preempt.h:5, from ./arch/xtensa/include/generated/asm/preempt.h:1, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:13, from drivers/infiniband/sw/rxe/rxe.h:17, from drivers/infiniband/sw/rxe/rxe_mw.c:10: include/linux/dma-mapping.h: In function 'dma_map_resource': arch/xtensa/include/asm/page.h:193:9: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] 193 | ((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr) | ^~ include/asm-generic/bug.h:144:27: note: in definition of macro 'WARN_ON_ONCE' 144 | int __ret_warn_once = !!(condition); \ | ^~~~~~~~~ include/linux/dma-mapping.h:352:19: note: in expansion of macro 'pfn_valid' 352 | if (WARN_ON_ONCE(pfn_valid(PHYS_PFN(phys_addr)))) | ^~~~~~~~~ drivers/infiniband/sw/rxe/rxe_mw.c: In function 'do_bind_mw': 227 | duplicate_mw = rxe_get_key(rxe, &new_key); | ^~~~~~~~~~~ | rxe_get_av 227 | duplicate_mw = rxe_get_key(rxe, &new_key); | ^~~~~~~ | new_rkey drivers/infiniband/sw/rxe/rxe_mw.c:227:35: note: each undeclared identifier is reported only once for each function it appears in drivers/infiniband/sw/rxe/rxe_mw.c:211:6: warning: unused variable 'ret' [-Wunused-variable] 211 | int ret; | ^~~ cc1: some warnings being treated as errors vim +227 drivers/infiniband/sw/rxe/rxe_mw.c 207 208 static int do_bind_mw(struct rxe_qp *qp, struct rxe_send_wqe *wqe, 209 struct rxe_mw *mw, struct rxe_mr *mr) 210 { 211 int ret; 212 u32 rkey; 213 u32 new_rkey; 214 struct rxe_mw *duplicate_mw; 215 struct rxe_dev *rxe = to_rdev(qp->ibqp.device); 216 217 /* 218 * key part of new rkey is provided by user for type 2 219 * and ibv_bind_mw() for type 1 MWs 220 * there is a very rare chance that the new rkey will 221 * collide with an existing MW. Return an error if this 222 * occurs 223 */ 224 rkey = mw->ibmw.rkey; 225 new_rkey = (rkey & 0xffffff00) | (wqe->wr.wr.umw.rkey & 0x000000ff); 226 228 if (duplicate_mw) { 229 pr_err_once("new MW key is a duplicate, try another\n"); 230 rxe_drop_ref(duplicate_mw); 231 return -EINVAL; 232 } 233 234 rxe_drop_key(mw); 235 rxe_add_key(mw, &new_rkey); 236 237 mw->access = wqe->wr.wr.umw.access; 238 mw->state = RXE_MEM_STATE_VALID; 239 mw->addr = wqe->wr.wr.umw.addr; 240 mw->length = wqe->wr.wr.umw.length; 241 242 if (mw->mr) { 243 rxe_drop_ref(mw->mr); 244 atomic_dec(&mw->mr->num_mw); 245 mw->mr = NULL; 246 } 247 248 if (mw->length) { 249 mw->mr = mr; 250 atomic_inc(&mr->num_mw); 251 rxe_add_ref(mr); 252 } 253 254 if (mw->ibmw.type == IB_MW_TYPE_2) 255 mw->qp = qp; 256 257 return 0; 258 } 259 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org