tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 146620506274bd24d52fb1c589110a30eed8240b commit: 4104a562e0ca62e971089db9d3c47794a0d7d4eb sched/core: Annotate curr pointer in rq with __rcu date: 11 months ago config: x86_64-randconfig-s032-20210115 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-208-g46a52ca4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 4104a562e0ca62e971089db9d3c47794a0d7d4eb # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 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 >>)" kernel/livepatch/transition.c: note: in included file: kernel/livepatch/../sched/sched.h:1619:25: sparse: struct task_struct [noderef] <asn:4> * vim +1619 kernel/livepatch/../sched/sched.h 029632fbb7b7c9d8 kernel/sched.h Peter Zijlstra 2011-10-25 1616 029632fbb7b7c9d8 kernel/sched.h Peter Zijlstra 2011-10-25 1617 static inline int task_current(struct rq *rq, struct task_struct *p) 029632fbb7b7c9d8 kernel/sched.h Peter Zijlstra 2011-10-25 1618 { 029632fbb7b7c9d8 kernel/sched.h Peter Zijlstra 2011-10-25 @1619 return rq->curr == p; 029632fbb7b7c9d8 kernel/sched.h Peter Zijlstra 2011-10-25 1620 } 029632fbb7b7c9d8 kernel/sched.h Peter Zijlstra 2011-10-25 1621 :::::: The code at line 1619 was first introduced by commit :::::: 029632fbb7b7c9d85063cc9eb470de6c54873df3 sched: Make separate sched*.c translation units :::::: TO: Peter Zijlstra <a.p.zijlstra(a)chello.nl&gt; :::::: CC: Ingo Molnar <mingo(a)elte.hu&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org