tree: git://git.infradead.org/users/hch/block.git remove-dma-mask-indirection head: 7f0f0d04b7c2d957bee8220cf37362ed7b956a3b commit: 7f0f0d04b7c2d957bee8220cf37362ed7b956a3b [2/2] device.h: make dma_mask a scalar instead of a pointer config: s390-randconfig-a001-20200311 (attached as .config) compiler: s390-linux-gcc (GCC) 9.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 7f0f0d04b7c2d957bee8220cf37362ed7b956a3b # save the attached .config to linux build tree GCC_VERSION=9.2.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/s390/cio/css.c: In function 'setup_css': 969 | css->device.dma_mask = &css->device.coherent_dma_mask; | ^ vim +969 drivers/s390/cio/css.c 495a5b45ac33b8 Cornelia Huck 2006-03-24 949 4d284cac76d0bf Heiko Carstens 2007-02-05 950 static int __init setup_css(int nr) a28c69448154a0 Cornelia Huck 2006-01-06 951 { 7c9f4e3aaae020 Cornelia Huck 2007-10-12 952 struct channel_subsystem *css; 15a2044d7f3c1e Sebastian Ott 2016-10-25 953 int ret; a28c69448154a0 Cornelia Huck 2006-01-06 954 15a2044d7f3c1e Sebastian Ott 2016-10-25 955 css = kzalloc(sizeof(*css), GFP_KERNEL); 15a2044d7f3c1e Sebastian Ott 2016-10-25 956 if (!css) d7b5a4c94f4913 Cornelia Huck 2006-12-08 957 return -ENOMEM; 15a2044d7f3c1e Sebastian Ott 2016-10-25 958 15a2044d7f3c1e Sebastian Ott 2016-10-25 959 channel_subsystems[nr] = css; 15a2044d7f3c1e Sebastian Ott 2016-10-25 960 dev_set_name(&css->device, "css%x", nr); 15a2044d7f3c1e Sebastian Ott 2016-10-25 961 css->device.groups = cssdev_attr_groups; 15a2044d7f3c1e Sebastian Ott 2016-10-25 962 css->device.release = channel_subsystem_release; bb99332a2b558e Halil Pasic 2019-04-02 963 /* bb99332a2b558e Halil Pasic 2019-04-02 964 * We currently allocate notifier bits with this (using bb99332a2b558e Halil Pasic 2019-04-02 965 * css->device as the device argument with the DMA API) bb99332a2b558e Halil Pasic 2019-04-02 966 * and are fine with 64 bit addresses. bb99332a2b558e Halil Pasic 2019-04-02 967 */ bb99332a2b558e Halil Pasic 2019-04-02 968 css->device.coherent_dma_mask = DMA_BIT_MASK(64); bb99332a2b558e Halil Pasic 2019-04-02 @969 css->device.dma_mask = &css->device.coherent_dma_mask; 15a2044d7f3c1e Sebastian Ott 2016-10-25 970 15a2044d7f3c1e Sebastian Ott 2016-10-25 971 mutex_init(&css->mutex); 15a2044d7f3c1e Sebastian Ott 2016-10-25 972 css->cssid = chsc_get_cssid(nr); 15a2044d7f3c1e Sebastian Ott 2016-10-25 973 css_generate_pgid(css, (u32) (get_tod_clock() >> 32)); 15a2044d7f3c1e Sebastian Ott 2016-10-25 974 15a2044d7f3c1e Sebastian Ott 2016-10-25 975 ret = device_register(&css->device); 15a2044d7f3c1e Sebastian Ott 2016-10-25 976 if (ret) { 15a2044d7f3c1e Sebastian Ott 2016-10-25 977 put_device(&css->device); 15a2044d7f3c1e Sebastian Ott 2016-10-25 978 goto out_err; 15a2044d7f3c1e Sebastian Ott 2016-10-25 979 } 15a2044d7f3c1e Sebastian Ott 2016-10-25 980 15a2044d7f3c1e Sebastian Ott 2016-10-25 981 css->pseudo_subchannel = kzalloc(sizeof(*css->pseudo_subchannel), 15a2044d7f3c1e Sebastian Ott 2016-10-25 982 GFP_KERNEL); 15a2044d7f3c1e Sebastian Ott 2016-10-25 983 if (!css->pseudo_subchannel) { 15a2044d7f3c1e Sebastian Ott 2016-10-25 984 device_unregister(&css->device); 15a2044d7f3c1e Sebastian Ott 2016-10-25 985 ret = -ENOMEM; 15a2044d7f3c1e Sebastian Ott 2016-10-25 986 goto out_err; 15a2044d7f3c1e Sebastian Ott 2016-10-25 987 } 15a2044d7f3c1e Sebastian Ott 2016-10-25 988 7c9f4e3aaae020 Cornelia Huck 2007-10-12 989 css->pseudo_subchannel->dev.parent = &css->device; 7c9f4e3aaae020 Cornelia Huck 2007-10-12 990 css->pseudo_subchannel->dev.release = css_subchannel_release; 5d6e6b6f6f3eac Peter Oberparleiter 2009-12-07 991 mutex_init(&css->pseudo_subchannel->reg_mutex); e5dcf0025d7af5 Sebastian Ott 2013-04-13 992 ret = css_sch_create_locks(css->pseudo_subchannel); d7b5a4c94f4913 Cornelia Huck 2006-12-08 993 if (ret) { 7c9f4e3aaae020 Cornelia Huck 2007-10-12 994 kfree(css->pseudo_subchannel); 15a2044d7f3c1e Sebastian Ott 2016-10-25 995 device_unregister(&css->device); 15a2044d7f3c1e Sebastian Ott 2016-10-25 996 goto out_err; d7b5a4c94f4913 Cornelia Huck 2006-12-08 997 } e2e0de9b579d47 Sebastian Ott 2016-06-17 998 15a2044d7f3c1e Sebastian Ott 2016-10-25 999 dev_set_name(&css->pseudo_subchannel->dev, "defunct"); 15a2044d7f3c1e Sebastian Ott 2016-10-25 1000 ret = device_register(&css->pseudo_subchannel->dev); 15a2044d7f3c1e Sebastian Ott 2016-10-25 1001 if (ret) { 15a2044d7f3c1e Sebastian Ott 2016-10-25 1002 put_device(&css->pseudo_subchannel->dev); 15a2044d7f3c1e Sebastian Ott 2016-10-25 1003 device_unregister(&css->device); 15a2044d7f3c1e Sebastian Ott 2016-10-25 1004 goto out_err; 15a2044d7f3c1e Sebastian Ott 2016-10-25 1005 } 15a2044d7f3c1e Sebastian Ott 2016-10-25 1006 15a2044d7f3c1e Sebastian Ott 2016-10-25 1007 return ret; 15a2044d7f3c1e Sebastian Ott 2016-10-25 1008 out_err: 15a2044d7f3c1e Sebastian Ott 2016-10-25 1009 channel_subsystems[nr] = NULL; 15a2044d7f3c1e Sebastian Ott 2016-10-25 1010 return ret; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1011 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1012 :::::: The code at line 969 was first introduced by commit :::::: bb99332a2b558e1f28b4c5011f9ea3b46f1c8806 s390/cio: introduce DMA pools to cio :::::: TO: Halil Pasic <pasic(a)linux.ibm.com&gt; :::::: CC: Heiko Carstens <heiko.carstens(a)de.ibm.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org