tree: https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git topic/tasklet head: 59cd818763e8b12e85f28e27fa0a6821faf45660 commit: 59cd818763e8b12e85f28e27fa0a6821faf45660 [81/81] dmaengine: fsl: convert tasklets to use new tasklet_setup() API config: powerpc-randconfig-r014-20200917 (attached as .config) compiler: powerpc-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 git checkout 59cd818763e8b12e85f28e27fa0a6821faf45660 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc 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 >>): drivers/dma/fsl_raid.c: In function 'fsl_re_dequeue': 166 | re_chan = dev_get_drvdata((struct device *)data); | ^~~~ | _data drivers/dma/fsl_raid.c:166:45: note: each undeclared identifier is reported only once for each function it appears in drivers/dma/fsl_raid.c: In function 'fsl_re_prep_dma_genq': drivers/dma/fsl_raid.c:338:11: warning: ordered comparison of pointer with integer zero [-Wextra] 338 | if (desc <= 0) | ^~ drivers/dma/fsl_raid.c: In function 'fsl_re_prep_dma_pq': drivers/dma/fsl_raid.c:462:11: warning: ordered comparison of pointer with integer zero [-Wextra] 462 | if (desc <= 0) | ^~ drivers/dma/fsl_raid.c: In function 'fsl_re_prep_dma_memcpy': drivers/dma/fsl_raid.c:546:11: warning: ordered comparison of pointer with integer zero [-Wextra] 546 | if (desc <= 0) | ^~ # https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git/commi... git remote add vkoul-dmaengine https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git git fetch --no-tags vkoul-dmaengine topic/tasklet git checkout 59cd818763e8b12e85f28e27fa0a6821faf45660 vim +166 drivers/dma/fsl_raid.c ad80da658bbcaa Xuelin Shi 2015-03-03 156 59cd818763e8b1 Allen Pais 2020-08-31 157 static void fsl_re_dequeue(struct tasklet_struct *t) ad80da658bbcaa Xuelin Shi 2015-03-03 158 { 59cd818763e8b1 Allen Pais 2020-08-31 159 struct fsl_re_chan *re_chan = from_tasklet(re_chan, t, irqtask); ad80da658bbcaa Xuelin Shi 2015-03-03 160 struct fsl_re_desc *desc, *_desc; ad80da658bbcaa Xuelin Shi 2015-03-03 161 struct fsl_re_hw_desc *hwdesc; ad80da658bbcaa Xuelin Shi 2015-03-03 162 unsigned long flags; ad80da658bbcaa Xuelin Shi 2015-03-03 163 unsigned int count, oub_count; ad80da658bbcaa Xuelin Shi 2015-03-03 164 int found; ad80da658bbcaa Xuelin Shi 2015-03-03 165 ad80da658bbcaa Xuelin Shi 2015-03-03 @166 re_chan = dev_get_drvdata((struct device *)data); ad80da658bbcaa Xuelin Shi 2015-03-03 167 ad80da658bbcaa Xuelin Shi 2015-03-03 168 fsl_re_cleanup_descs(re_chan); ad80da658bbcaa Xuelin Shi 2015-03-03 169 ad80da658bbcaa Xuelin Shi 2015-03-03 170 spin_lock_irqsave(&re_chan->desc_lock, flags); ad80da658bbcaa Xuelin Shi 2015-03-03 171 count = FSL_RE_SLOT_FULL(in_be32(&re_chan->jrregs->oubring_slot_full)); ad80da658bbcaa Xuelin Shi 2015-03-03 172 while (count--) { ad80da658bbcaa Xuelin Shi 2015-03-03 173 found = 0; ad80da658bbcaa Xuelin Shi 2015-03-03 174 hwdesc = &re_chan->oub_ring_virt_addr[re_chan->oub_count]; ad80da658bbcaa Xuelin Shi 2015-03-03 175 list_for_each_entry_safe(desc, _desc, &re_chan->active_q, ad80da658bbcaa Xuelin Shi 2015-03-03 176 node) { ad80da658bbcaa Xuelin Shi 2015-03-03 177 /* compare the hw dma addr to find the completed */ ad80da658bbcaa Xuelin Shi 2015-03-03 178 if (desc->hwdesc.lbea32 == hwdesc->lbea32 && ad80da658bbcaa Xuelin Shi 2015-03-03 179 desc->hwdesc.addr_low == hwdesc->addr_low) { ad80da658bbcaa Xuelin Shi 2015-03-03 180 found = 1; ad80da658bbcaa Xuelin Shi 2015-03-03 181 break; ad80da658bbcaa Xuelin Shi 2015-03-03 182 } ad80da658bbcaa Xuelin Shi 2015-03-03 183 } ad80da658bbcaa Xuelin Shi 2015-03-03 184 ad80da658bbcaa Xuelin Shi 2015-03-03 185 if (found) { ad80da658bbcaa Xuelin Shi 2015-03-03 186 fsl_re_desc_done(desc); ad80da658bbcaa Xuelin Shi 2015-03-03 187 list_move_tail(&desc->node, &re_chan->ack_q); ad80da658bbcaa Xuelin Shi 2015-03-03 188 } else { ad80da658bbcaa Xuelin Shi 2015-03-03 189 dev_err(re_chan->dev, ad80da658bbcaa Xuelin Shi 2015-03-03 190 "found hwdesc not in sw queue, discard it\n"); ad80da658bbcaa Xuelin Shi 2015-03-03 191 } ad80da658bbcaa Xuelin Shi 2015-03-03 192 ad80da658bbcaa Xuelin Shi 2015-03-03 193 oub_count = (re_chan->oub_count + 1) & FSL_RE_RING_SIZE_MASK; ad80da658bbcaa Xuelin Shi 2015-03-03 194 re_chan->oub_count = oub_count; ad80da658bbcaa Xuelin Shi 2015-03-03 195 ad80da658bbcaa Xuelin Shi 2015-03-03 196 out_be32(&re_chan->jrregs->oubring_job_rmvd, ad80da658bbcaa Xuelin Shi 2015-03-03 197 FSL_RE_RMVD_JOB(1)); ad80da658bbcaa Xuelin Shi 2015-03-03 198 } ad80da658bbcaa Xuelin Shi 2015-03-03 199 spin_unlock_irqrestore(&re_chan->desc_lock, flags); ad80da658bbcaa Xuelin Shi 2015-03-03 200 } ad80da658bbcaa Xuelin Shi 2015-03-03 201 :::::: The code at line 166 was first introduced by commit :::::: ad80da658bbcaaac1d3617ea6cb0f4d5e16da422 dmaengine: Driver support for FSL RaidEngine device. :::::: TO: Xuelin Shi <xuelin.shi(a)freescale.com&gt; :::::: CC: Vinod Koul <vinod.koul(a)intel.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org