tree: https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git simple_copy head: d6f32b90156624ae9dc06ef5873334a48e9b9806 commit: 8fcfa60ee742c99c9aeb2cc6efbc8c51ca435a77 [3/5] nvme: add simple copy support config: arm-randconfig-s032-20210209 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-215-g0fb77bb6-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git/commit/?id... git remote add chao-linux https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git git fetch --no-tags chao-linux simple_copy git checkout 8fcfa60ee742c99c9aeb2cc6efbc8c51ca435a77 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; "sparse warnings: (new ones prefixed by >>)" drivers/nvme/host/core.c: note: in included file (through include/linux/notifier.h, include/linux/memory_hotplug.h, include/linux/mmzone.h, ...): include/linux/srcu.h:179:9: sparse: sparse: context imbalance in 'nvme_put_ns_from_disk' - unexpected unlock vim +2009 drivers/nvme/host/core.c 1990 1991 static void nvme_config_copy(struct gendisk *disk, struct nvme_ns *ns, 1992 struct nvme_id_ns *id) 1993 { 1994 struct nvme_ctrl *ctrl = ns->ctrl; 1995 struct request_queue *queue = disk->queue; 1996 1997 if (!(ctrl->oncs & NVME_CTRL_ONCS_COPY)) { 1998 queue->limits.copy_offload = 0; 1999 queue->limits.max_copy_sectors = 0; 2000 queue->limits.max_copy_range_sectors = 0; 2001 queue->limits.max_copy_nr_ranges = 0; 2002 blk_queue_flag_clear(QUEUE_FLAG_COPY, queue); 2003 return; 2004 } 2005 2006 /* setting copy limits */ 2007 blk_queue_flag_test_and_set(QUEUE_FLAG_COPY, queue); 2008 queue->limits.copy_offload = 0; 2010 (1 << (ns->lba_shift - 9)); 2012 (1 << (ns->lba_shift - 9)); 2013 queue->limits.max_copy_nr_ranges = id->msrc + 1; 2014 } 2015 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org