tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y head: e864f43593ccf9180c61738abdf1c1dde091367d commit: b92e5db0f492026778cb31dfc479e50f33f75bca [5303/9999] powerpc/32: Avoid unsupported flags with clang config: powerpc64-randconfig-r026-20201230 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 6b316febb4388764789677f81f03aff373ec35b2) 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 # install powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.gi... git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc linux-4.19.y git checkout b92e5db0f492026778cb31dfc479e50f33f75bca # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from drivers/ata/pata_atiixp.c:15: In file included from include/linux/kernel.h:11: In file included from include/linux/bitops.h:19: In file included from arch/powerpc/include/asm/bitops.h:247: In file included from include/asm-generic/bitops/le.h:6: In file included from arch/powerpc/include/uapi/asm/byteorder.h:14: In file included from include/linux/byteorder/big_endian.h:11: include/linux/byteorder/generic.h:195:16: warning: comparison of integers of different signs: 'int' and 'size_t' (aka 'unsigned int') [-Wsign-compare] for (i = 0; i < len; i++) ~ ^ ~~~ include/linux/byteorder/generic.h:203:16: warning: comparison of integers of different signs: 'int' and 'size_t' (aka 'unsigned int') [-Wsign-compare] for (i = 0; i < len; i++) ~ ^ ~~~ In file included from drivers/ata/pata_atiixp.c:16: In file included from include/linux/module.h:10: In file included from include/linux/stat.h:19: In file included from include/linux/time.h:6: In file included from include/linux/seqlock.h:36: In file included from include/linux/spinlock.h:51: In file included from include/linux/preempt.h:81: In file included from ./arch/powerpc/include/generated/asm/preempt.h:1: In file included from include/asm-generic/preempt.h:5: include/linux/thread_info.h:141:29: warning: comparison of integers of different signs: 'int' and 'size_t' (aka 'unsigned int') [-Wsign-compare] if (unlikely(sz >= 0 && sz < bytes)) { ~~ ^ ~~~~~ include/linux/compiler.h:77:42: note: expanded from macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ In file included from drivers/ata/pata_atiixp.c:16: In file included from include/linux/module.h:13: In file included from include/linux/kmod.h:22: In file included from include/linux/umh.h:4: In file included from include/linux/gfp.h:6: include/linux/mmzone.h:984:44: warning: comparison of integers of different signs: 'int' and 'enum zone_type' [-Wsign-compare] if (likely(!nodes && zonelist_zone_idx(z) <= highest_zoneidx)) ~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~ include/linux/compiler.h:76:40: note: expanded from macro 'likely' # define likely(x) __builtin_expect(!!(x), 1) ^ In file included from drivers/ata/pata_atiixp.c:17: In file included from include/linux/pci.h:1348: In file included from include/linux/dmapool.h:14: In file included from include/linux/scatterlist.h:8: In file included from include/linux/mm.h:26: In file included from include/linux/page_ref.h:7: include/linux/page-flags.h:162:21: warning: comparison of integers of different signs: 'const unsigned long' and 'long' [-Wsign-compare] return page->flags == PAGE_POISON_PATTERN; ~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~ In file included from drivers/ata/pata_atiixp.c:17: In file included from include/linux/pci.h:1348: In file included from include/linux/dmapool.h:14: In file included from include/linux/scatterlist.h:8: include/linux/mm.h:560:14: warning: comparison of integers of different signs: 'unsigned long' and 'long' [-Wsign-compare] return addr >= VMALLOC_START && addr < VMALLOC_END; ~~~~ ^ ~~~~~~~~~~~~~ In file included from drivers/ata/pata_atiixp.c:17: In file included from include/linux/pci.h:1348: In file included from include/linux/dmapool.h:14: In file included from include/linux/scatterlist.h:8: In file included from include/linux/mm.h:1162: include/linux/vmstat.h:221:2: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare] for_each_online_cpu(cpu) ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/cpumask.h:778:36: note: expanded from macro 'for_each_online_cpu' #define for_each_online_cpu(cpu) for_each_cpu((cpu), cpu_online_mask) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/cpumask.h:243:9: note: expanded from macro 'for_each_cpu' (cpu) < nr_cpu_ids;) ~~~ ^ ~~~~~~~~~~ In file included from drivers/ata/pata_atiixp.c:18: In file included from include/linux/blkdev.h:11: include/linux/genhd.h:314:2: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare] for_each_possible_cpu(i) ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/cpumask.h:777:36: note: expanded from macro 'for_each_possible_cpu' #define for_each_possible_cpu(cpu) for_each_cpu((cpu), cpu_possible_mask) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/cpumask.h:243:9: note: expanded from macro 'for_each_cpu' (cpu) < nr_cpu_ids;) ~~~ ^ ~~~~~~~~~~ In file included from drivers/ata/pata_atiixp.c:18: In file included from include/linux/blkdev.h:21: include/linux/bio.h:412:14: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare] if (sectors >= bio_sectors(bio)) ~~~~~~~ ^ ~~~~~~~~~~~~~~~~ In file included from drivers/ata/pata_atiixp.c:21: include/linux/libata.h:113:23: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare] if (dval < 0 || dval >= (sizeof(u32) * 8)) ~~~~ ^ ~~~~~~~~~~~~~~~ drivers/ata/pata_atiixp.c:254:19: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] .sg_tablesize = LIBATA_DUMB_MAX_PRD, ^~~~~~~~~~~~~~~~~~~ drivers/ata/pata_atiixp.c:253:2: note: previous initialization is here ATA_BMDMA_SHT(DRV_NAME), ^~~~~~~~~~~~~~~~~~~~~~~ include/linux/libata.h:1910:19: note: expanded from macro 'ATA_BMDMA_SHT' .sg_tablesize = LIBATA_MAX_PRD, \ ^~~~~~~~~~~~~~ if((pdev->device == PCI_DEVICE_ID_ATI_IXP600_IDE)) ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/ata/pata_atiixp.c:282:19: note: remove extraneous parentheses around the comparison to silence this warning if((pdev->device == PCI_DEVICE_ID_ATI_IXP600_IDE)) ~ ^ ~ drivers/ata/pata_atiixp.c:282:19: note: use '=' to turn this equality comparison into an assignment if((pdev->device == PCI_DEVICE_ID_ATI_IXP600_IDE)) ^~ = 12 warnings generated. Assembler messages: Fatal error: invalid listing option `3' clang-12: error: assembler command failed with exit code 1 (use -v to see invocation) Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for HOTPLUG_CPU Depends on SMP && (PPC_PSERIES || PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE Selected by - PM_SLEEP_SMP && SMP && (ARCH_SUSPEND_POSSIBLE || ARCH_HIBERNATION_POSSIBLE && PM_SLEEP vim +282 drivers/ata/pata_atiixp.c 669a5db411d85a1 Jeff Garzik 2006-08-29 251 669a5db411d85a1 Jeff Garzik 2006-08-29 252 static struct scsi_host_template atiixp_sht = { 68d1d07b510bb57 Tejun Heo 2008-03-25 253 ATA_BMDMA_SHT(DRV_NAME), 635adc28087ced0 Alan Cox 2008-02-20 @254 .sg_tablesize = LIBATA_DUMB_MAX_PRD, 669a5db411d85a1 Jeff Garzik 2006-08-29 255 }; 669a5db411d85a1 Jeff Garzik 2006-08-29 256 669a5db411d85a1 Jeff Garzik 2006-08-29 257 static struct ata_port_operations atiixp_port_ops = { 029cfd6b74fc5c5 Tejun Heo 2008-03-25 258 .inherits = &ata_bmdma_port_ops, 669a5db411d85a1 Jeff Garzik 2006-08-29 259 f47451c45fe0032 Tejun Heo 2010-05-10 260 .qc_prep = ata_bmdma_dumb_qc_prep, 669a5db411d85a1 Jeff Garzik 2006-08-29 261 .bmdma_start = atiixp_bmdma_start, 669a5db411d85a1 Jeff Garzik 2006-08-29 262 .bmdma_stop = atiixp_bmdma_stop, bda3028813bd07f Jeff Garzik 2006-09-27 263 46b9e77076a609d Bartlomiej Zolnierkiewicz 2011-10-11 264 .prereset = atiixp_prereset, 029cfd6b74fc5c5 Tejun Heo 2008-03-25 265 .cable_detect = atiixp_cable_detect, 029cfd6b74fc5c5 Tejun Heo 2008-03-25 266 .set_piomode = atiixp_set_piomode, 029cfd6b74fc5c5 Tejun Heo 2008-03-25 267 .set_dmamode = atiixp_set_dmamode, 669a5db411d85a1 Jeff Garzik 2006-08-29 268 }; 669a5db411d85a1 Jeff Garzik 2006-08-29 269 16028232bf6dc5e Tejun Heo 2009-01-16 270 static int atiixp_init_one(struct pci_dev *pdev, const struct pci_device_id *id) 669a5db411d85a1 Jeff Garzik 2006-08-29 271 { 1626aeb881236c8 Tejun Heo 2007-05-04 272 static const struct ata_port_info info = { 1d2808fd3d2d5d2 Jeff Garzik 2007-05-28 273 .flags = ATA_FLAG_SLAVE_POSS, 14bdef982caeda1 Erik Inge Bolsø 2009-03-14 274 .pio_mask = ATA_PIO4, 14bdef982caeda1 Erik Inge Bolsø 2009-03-14 275 .mwdma_mask = ATA_MWDMA12_ONLY, 14bdef982caeda1 Erik Inge Bolsø 2009-03-14 276 .udma_mask = ATA_UDMA5, 669a5db411d85a1 Jeff Garzik 2006-08-29 277 .port_ops = &atiixp_port_ops 669a5db411d85a1 Jeff Garzik 2006-08-29 278 }; 16028232bf6dc5e Tejun Heo 2009-01-16 279 const struct ata_port_info *ppi[] = { &info, &info }; 16028232bf6dc5e Tejun Heo 2009-01-16 280 e47ecd4e48030c5 Darren Stevens 2017-12-31 281 /* SB600 doesn't have secondary port wired */ e47ecd4e48030c5 Darren Stevens 2017-12-31 @282 if((pdev->device == PCI_DEVICE_ID_ATI_IXP600_IDE)) e47ecd4e48030c5 Darren Stevens 2017-12-31 283 ppi[1] = &ata_dummy_port_info; e47ecd4e48030c5 Darren Stevens 2017-12-31 284 1c5afdf7a629d2e Tejun Heo 2010-05-19 285 return ata_pci_bmdma_init_one(pdev, ppi, &atiixp_sht, NULL, 1d3a8118b049252 Alan Cox 2010-02-17 286 ATA_HOST_PARALLEL_SCAN); 669a5db411d85a1 Jeff Garzik 2006-08-29 287 } 669a5db411d85a1 Jeff Garzik 2006-08-29 288 :::::: The code at line 282 was first introduced by commit :::::: e47ecd4e48030c516e7521403f98903ea1c8f9a7 libata:pata_atiixp: Don't use unconnected secondary port on SB600 :::::: TO: Darren Stevens <darren(a)stevens-zone.net&gt; :::::: CC: Tejun Heo <tj(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org