Hi Tejun, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git review-cgroup-reorg head: 3fd6a2eec6783bff033e553a3773c897a7f93109 commit: 71f76f958ba552114971653cdb56e5d8ce0b9988 [7/13] cgroup: move cgroup files under kernel/cgroup/ reproduce: # apt-get install sparse git checkout 71f76f958ba552114971653cdb56e5d8ce0b9988 make ARCH=x86_64 allmodconfig make C=1 CF=-D__CHECK_ENDIAN__ sparse warnings: (new ones prefixed by >>) include/linux/compiler.h:253:8: sparse: attribute 'no_sanitize_address': unknown attribute >> kernel/cgroup/cgroup.c:4764:16: sparse: incompatible types in comparison expression (different address spaces) kernel/cgroup/cgroup.c:6248:16: sparse: incompatible types in comparison expression (different address spaces) vim +4764 kernel/cgroup/cgroup.c 72ec70299 kernel/cgroup.c Tejun Heo 2013-08-08 4748 struct css_task_iter it; 846c7bb05 kernel/cgroup.c Balbir Singh 2007-10-18 4749 struct task_struct *tsk; 33d283bef kernel/cgroup.c Li Zefan 2008-11-19 4750 2bd59d48e kernel/cgroup.c Tejun Heo 2014-02-11 4751 /* it should be kernfs_node belonging to cgroupfs and is a directory */ 2bd59d48e kernel/cgroup.c Tejun Heo 2014-02-11 4752 if (dentry->d_sb->s_type != &cgroup_fs_type || !kn || 2bd59d48e kernel/cgroup.c Tejun Heo 2014-02-11 4753 kernfs_type(kn) != KERNFS_DIR) 2bd59d48e kernel/cgroup.c Tejun Heo 2014-02-11 4754 return -EINVAL; 2bd59d48e kernel/cgroup.c Tejun Heo 2014-02-11 4755 bad346603 kernel/cgroup.c Li Zefan 2014-02-14 4756 mutex_lock(&cgroup_mutex); bad346603 kernel/cgroup.c Li Zefan 2014-02-14 4757 846c7bb05 kernel/cgroup.c Balbir Singh 2007-10-18 4758 /* 2bd59d48e kernel/cgroup.c Tejun Heo 2014-02-11 4759 * We aren't being called from kernfs and there's no guarantee on ec903c0c8 kernel/cgroup.c Tejun Heo 2014-05-13 4760 * @kn->priv's validity. For this and css_tryget_online_from_dir(), 2bd59d48e kernel/cgroup.c Tejun Heo 2014-02-11 4761 * @kn->priv is RCU safe. Let's do the RCU dancing. 846c7bb05 kernel/cgroup.c Balbir Singh 2007-10-18 4762 */ 2bd59d48e kernel/cgroup.c Tejun Heo 2014-02-11 4763 rcu_read_lock(); 2bd59d48e kernel/cgroup.c Tejun Heo 2014-02-11 @4764 cgrp = rcu_dereference(kn->priv); bad346603 kernel/cgroup.c Li Zefan 2014-02-14 4765 if (!cgrp || cgroup_is_dead(cgrp)) { 2bd59d48e kernel/cgroup.c Tejun Heo 2014-02-11 4766 rcu_read_unlock(); bad346603 kernel/cgroup.c Li Zefan 2014-02-14 4767 mutex_unlock(&cgroup_mutex); 2bd59d48e kernel/cgroup.c Tejun Heo 2014-02-11 4768 return -ENOENT; 2bd59d48e kernel/cgroup.c Tejun Heo 2014-02-11 4769 } bad346603 kernel/cgroup.c Li Zefan 2014-02-14 4770 rcu_read_unlock(); 846c7bb05 kernel/cgroup.c Balbir Singh 2007-10-18 4771 9d800df12 kernel/cgroup.c Tejun Heo 2014-05-14 4772 css_task_iter_start(&cgrp->self, &it); :::::: The code at line 4764 was first introduced by commit :::::: 2bd59d48ebfb3df41ee56938946ca0dd30887312 cgroup: convert to kernfs :::::: TO: Tejun Heo <tj@xxxxxxxxxx> :::::: CC: Tejun Heo <tj@xxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
