Hi Arnd, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.10.y head: 5040520482a594e92d4f69141229a6dd26173511 commit: 87ae522e467e17a13b796e2cb595f9c3943e4d5e [644/1522] m68knommu: only set CONFIG_ISA_DMA_API for ColdFire sub-arch config: m68k-randconfig-r032-20211014 (attached as .config) compiler: m68k-linux-gcc (GCC) 11.2.0 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 # 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-5.10.y git checkout 87ae522e467e17a13b796e2cb595f9c3943e4d5e # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=m68k SHELL=/bin/bash drivers/scsi/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): drivers/scsi/BusLogic.c: In function 'blogic_rdconfig': 1735 | (void *) high_memory > (void *) MAX_DMA_ADDRESS) | ^ drivers/scsi/BusLogic.c:1748:46: warning: ordered comparison of pointer with null pointer [-Wextra] 1748 | (void *) high_memory > (void *) MAX_DMA_ADDRESS) | ^ drivers/scsi/BusLogic.c: In function 'blogic_getres': 2006 | set_dma_mode(adapter->dma_ch, DMA_MODE_CASCADE); | ^~~~~~~~~~~~~~~~ | DMA_MODE_READ drivers/scsi/BusLogic.c:2006:47: note: each undeclared identifier is reported only once for each function it appears in drivers/scsi/BusLogic.c: In function 'blogic_msg': drivers/scsi/BusLogic.c:3591:9: warning: function 'blogic_msg' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 3591 | len = vsprintf(buf, fmt, args); | ^~~ vim +2006 drivers/scsi/BusLogic.c ^1da177e4c3f41 Linus Torvalds 2005-04-16 1980 839cb99e8f7483 Khalid Aziz 2013-05-16 1981 static bool __init blogic_getres(struct blogic_adapter *adapter) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1982 { 839cb99e8f7483 Khalid Aziz 2013-05-16 1983 if (adapter->irq_ch == 0) { 839cb99e8f7483 Khalid Aziz 2013-05-16 1984 blogic_err("NO LEGAL INTERRUPT CHANNEL ASSIGNED - DETACHING\n", 839cb99e8f7483 Khalid Aziz 2013-05-16 1985 adapter); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1986 return false; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1987 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1988 /* ^1da177e4c3f41 Linus Torvalds 2005-04-16 1989 Acquire shared access to the IRQ Channel. ^1da177e4c3f41 Linus Torvalds 2005-04-16 1990 */ 839cb99e8f7483 Khalid Aziz 2013-05-16 1991 if (request_irq(adapter->irq_ch, blogic_inthandler, IRQF_SHARED, 839cb99e8f7483 Khalid Aziz 2013-05-16 1992 adapter->full_model, adapter) < 0) { 839cb99e8f7483 Khalid Aziz 2013-05-16 1993 blogic_err("UNABLE TO ACQUIRE IRQ CHANNEL %d - DETACHING\n", 839cb99e8f7483 Khalid Aziz 2013-05-16 1994 adapter, adapter->irq_ch); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1995 return false; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1996 } 839cb99e8f7483 Khalid Aziz 2013-05-16 1997 adapter->irq_acquired = true; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1998 /* ^1da177e4c3f41 Linus Torvalds 2005-04-16 1999 Acquire exclusive access to the DMA Channel. ^1da177e4c3f41 Linus Torvalds 2005-04-16 2000 */ 839cb99e8f7483 Khalid Aziz 2013-05-16 2001 if (adapter->dma_ch > 0) { 839cb99e8f7483 Khalid Aziz 2013-05-16 2002 if (request_dma(adapter->dma_ch, adapter->full_model) < 0) { 839cb99e8f7483 Khalid Aziz 2013-05-16 2003 blogic_err("UNABLE TO ACQUIRE DMA CHANNEL %d - DETACHING\n", adapter, adapter->dma_ch); ^1da177e4c3f41 Linus Torvalds 2005-04-16 2004 return false; ^1da177e4c3f41 Linus Torvalds 2005-04-16 2005 } 839cb99e8f7483 Khalid Aziz 2013-05-16 @2006 set_dma_mode(adapter->dma_ch, DMA_MODE_CASCADE); 839cb99e8f7483 Khalid Aziz 2013-05-16 2007 enable_dma(adapter->dma_ch); 839cb99e8f7483 Khalid Aziz 2013-05-16 2008 adapter->dma_chan_acquired = true; ^1da177e4c3f41 Linus Torvalds 2005-04-16 2009 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 2010 /* ^1da177e4c3f41 Linus Torvalds 2005-04-16 2011 Indicate the System Resource Acquisition completed successfully, ^1da177e4c3f41 Linus Torvalds 2005-04-16 2012 */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 2013 return true; ^1da177e4c3f41 Linus Torvalds 2005-04-16 2014 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 2015 :::::: The code at line 2006 was first introduced by commit :::::: 839cb99e8f748391059d10388c8aea48a88c142c [SCSI] BusLogic: Fix style issues :::::: TO: Khalid Aziz <khalid.aziz(a)oracle.com&gt; :::::: CC: James Bottomley <JBottomley(a)Parallels.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org