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Subjectkernel/livepatch/../sched/sched.h:1619:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 0cfc8a8d70dcd51db783e8e87917e02149c71458
commit: 4104a562e0ca62e971089db9d3c47794a0d7d4eb sched/core: Annotate curr pointer in rq with __rcu
date: 3 months ago
config: x86_64-randconfig-s002-20200524 (attached as .config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.1-193-gb8fad4bc-dirty
git checkout 4104a562e0ca62e971089db9d3c47794a0d7d4eb
# save the attached .config to linux build tree
make W=1 C=1 ARCH=x86_64 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)

>> kernel/livepatch/../sched/sched.h:1619:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
>> kernel/livepatch/../sched/sched.h:1619:25: sparse: struct task_struct [noderef] <asn:4> *
>> kernel/livepatch/../sched/sched.h:1619:25: sparse: struct task_struct *

vim +1619 kernel/livepatch/../sched/sched.h

029632fbb7b7c9 kernel/sched.h Peter Zijlstra 2011-10-25 1616
029632fbb7b7c9 kernel/sched.h Peter Zijlstra 2011-10-25 1617 static inline int task_current(struct rq *rq, struct task_struct *p)
029632fbb7b7c9 kernel/sched.h Peter Zijlstra 2011-10-25 1618 {
029632fbb7b7c9 kernel/sched.h Peter Zijlstra 2011-10-25 @1619 return rq->curr == p;
029632fbb7b7c9 kernel/sched.h Peter Zijlstra 2011-10-25 1620 }
029632fbb7b7c9 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@chello.nl>
:::::: CC: Ingo Molnar <mingo@elte.hu>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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