tree: git://git.infradead.org/users/hch/misc.git blkdev_get-cleanups head: 55dac63d56fe4cf5e47acc2fa99ac6213d6c96c1 commit: 2acfd13168491a99627a7452856a49c851a3e165 [8/14] dasd: cleanup dasd_scan_partitions config: s390-allyesconfig (attached as .config) compiler: s390-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 2acfd13168491a99627a7452856a49c851a3e165 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 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/s390/block/dasd_int.h:56, from drivers/s390/block/dasd_genhd.c:25: drivers/s390/block/dasd_genhd.c: In function 'dasd_scan_partitions': 107 | "scan partitions error, blkdev_get returned %ld", | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 108 | IS_ERR(bdev)); | ~~~~~~~~~~~~ | | | int arch/s390/include/asm/debug.h:256:12: note: in definition of macro 'debug_sprintf_event' 256 | _fmt, ## __VA_ARGS__); \ | ^~~~ drivers/s390/block/dasd_genhd.c:106:3: note: in expansion of macro 'DBF_DEV_EVENT' 106 | DBF_DEV_EVENT(DBF_ERR, block->base, | ^~~~~~~~~~~~~ drivers/s390/block/dasd_genhd.c:107:56: note: format string is defined here 107 | "scan partitions error, blkdev_get returned %ld", | ~~^ | | | long int | %d git remote add hch-misc git://git.infradead.org/users/hch/misc.git git fetch --no-tags hch-misc blkdev_get-cleanups git checkout 2acfd13168491a99627a7452856a49c851a3e165 vim +107 drivers/s390/block/dasd_genhd.c 95 96 /* 97 * Trigger a partition detection. 98 */ 99 int dasd_scan_partitions(struct dasd_block *block) 100 { 101 struct block_device *bdev; 102 int rc; 103 104 bdev = blkdev_get_by_dev(disk_devt(block->gdp), FMODE_READ, NULL); 105 if (IS_ERR(bdev)) { 106 DBF_DEV_EVENT(DBF_ERR, block->base, 108 IS_ERR(bdev)); 109 return -ENODEV; 110 } 111 112 mutex_lock(&bdev->bd_mutex); 113 rc = bdev_disk_changed(bdev, false); 114 mutex_unlock(&bdev->bd_mutex); 115 if (rc) 116 DBF_DEV_EVENT(DBF_ERR, block->base, 117 "scan partitions error, rc %d", rc); 118 119 /* 120 * Since the matching blkdev_put call to the blkdev_get in 121 * this function is not called before dasd_destroy_partitions 122 * the offline open_count limit needs to be increased from 123 * 0 to 1. This is done by setting device->bdev (see 124 * dasd_generic_set_offline). As long as the partition 125 * detection is running no offline should be allowed. That 126 * is why the assignment to device->bdev is done AFTER 127 * the BLKRRPART ioctl. 128 */ 129 block->bdev = bdev; 130 return 0; 131 } 132 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org