Hi, [auto build test WARNING on robh/for-next] [also build test WARNING on v4.7-rc6 next-20160706] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Peter-Griffin/Add-support-for-FDMA-DMA-controller-and-slim-core-rproc-found-on-STi-chipsets/20160706-170304 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next config: arm-allyesconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (Debian 5.3.1-8) 5.3.1 20160205 reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=arm Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers/dma/st_fdma.c: In function 'st_fdma_prep_slave_sg': >> drivers/dma/st_fdma.c:550:19: warning: 'hw_node' may be used uninitialized in this function [-Wmaybe-uninitialized] hw_node->control |= FDMA_NODE_CTRL_INT_EON; ^ drivers/dma/st_fdma.c: In function 'st_fdma_probe': drivers/dma/st_fdma.c:759:5: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized] if (ret) { ^ vim +/hw_node +550 drivers/dma/st_fdma.c 534 535 hw_node->next = fdesc->node[(i + 1) % sg_len].pdesc; 536 hw_node->control = FDMA_NODE_CTRL_REQ_MAP_DREQ(fchan->dreq_line); 537 538 fill_hw_node(hw_node, fchan, direction); 539 540 if (direction == DMA_MEM_TO_DEV) 541 hw_node->saddr = sg_dma_address(sg); 542 else 543 hw_node->daddr = sg_dma_address(sg); 544 545 hw_node->nbytes = sg_dma_len(sg); 546 hw_node->generic.length = sg_dma_len(sg); 547 } 548 549 /* interrupt at end of last node */ > 550 hw_node->control |= FDMA_NODE_CTRL_INT_EON; 551 552 return vchan_tx_prep(&fchan->vchan, &fdesc->vdesc, flags); 553 } 554 555 static size_t st_fdma_desc_residue(struct st_fdma_chan *fchan, 556 struct virt_dma_desc *vdesc, 557 bool in_progress) 558 { --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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