arch/um/include/asm/thread_info.h:47:9: sparse: sparse: context imbalance in 'RCU_in_HARDIRQ' - wrong count at exit

arch/um/include/asm/thread_info.h:47:9: sparse: sparse: context imbalance in 'RCU_in_HARDIRQ' - wrong count at exit

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 9602 bytes --]

CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Boqun Feng <boqun.feng@gmail.com>
CC: Peter Zijlstra <peterz@infradead.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   6efb943b8616ec53a5e444193dccf1af9ad627b5
commit: 9271a40d2a1429113160ccc4c16150921600bcc1 lockdep/selftest: Add wait context selftests
date:   4 months ago
:::::: branch date: 17 hours ago
:::::: commit date: 4 months ago
config: um-randconfig-s031-20210510 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9271a40d2a1429113160ccc4c16150921600bcc1
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 9271a40d2a1429113160ccc4c16150921600bcc1
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=um 

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


sparse warnings: (new ones prefixed by >>)
   lib/locking-selftest.c:298:1: sparse: sparse: context imbalance in 'AA_spin' - wrong count at exit
   lib/locking-selftest.c:300:1: sparse: sparse: context imbalance in 'AA_wlock' - wrong count at exit
   lib/locking-selftest.c:302:1: sparse: sparse: context imbalance in 'AA_rlock' - wrong count at exit
   lib/locking-selftest.c:321:13: sparse: sparse: context imbalance in 'rlock_AA1' - wrong count at exit
   lib/locking-selftest.c:327:13: sparse: sparse: context imbalance in 'rlock_AA1B' - wrong count at exit
   lib/locking-selftest.c:347:13: sparse: sparse: context imbalance in 'rlock_AA2' - wrong count at exit
   lib/locking-selftest.c:359:13: sparse: sparse: context imbalance in 'rlock_AA3' - wrong count at exit
   lib/locking-selftest.c:722:1: sparse: sparse: context imbalance in 'double_unlock_spin' - unexpected unlock
   lib/locking-selftest.c:724:1: sparse: sparse: context imbalance in 'double_unlock_wlock' - unexpected unlock
   lib/locking-selftest.c:726:1: sparse: sparse: context imbalance in 'double_unlock_rlock' - unexpected unlock
   lib/locking-selftest.c:753:1: sparse: sparse: context imbalance in 'init_held_spin' - wrong count at exit
   lib/locking-selftest.c:755:1: sparse: sparse: context imbalance in 'init_held_wlock' - wrong count at exit
   lib/locking-selftest.c:757:1: sparse: sparse: context imbalance in 'init_held_rlock' - wrong count at exit
   lib/locking-selftest.c:2456:13: sparse: sparse: context imbalance in 'rcu_exit' - unexpected unlock
   lib/locking-selftest.c:2465:13: sparse: sparse: context imbalance in 'rcu_bh_exit' - unexpected unlock
   lib/locking-selftest.c:2474:13: sparse: sparse: context imbalance in 'rcu_sched_exit' - unexpected unlock
   lib/locking-selftest.c:2493:13: sparse: sparse: context imbalance in 'raw_spinlock_exit' - unexpected unlock
   lib/locking-selftest.c:2502:13: sparse: sparse: context imbalance in 'spinlock_exit' - unexpected unlock
   lib/locking-selftest.c: note: in included file (through include/linux/thread_info.h, include/asm-generic/preempt.h, arch/um/include/generated/asm/preempt.h, ...):
>> arch/um/include/asm/thread_info.h:47:9: sparse: sparse: context imbalance in 'RCU_in_HARDIRQ' - wrong count at exit
>> arch/um/include/asm/thread_info.h:47:9: sparse: sparse: context imbalance in 'RCU_in_NOTTHREADED_HARDIRQ' - wrong count at exit
>> arch/um/include/asm/thread_info.h:47:9: sparse: sparse: context imbalance in 'RCU_in_SOFTIRQ' - wrong count at exit
   lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_RCU' - wrong count at exit
   lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_RCU_BH' - wrong count at exit
   lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_RCU_CALLBACK' - wrong count at exit
   lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_RCU_SCHED' - wrong count at exit
   lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_RAW_SPINLOCK' - wrong count at exit
   lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_SPINLOCK' - wrong count at exit
   lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_MUTEX' - wrong count at exit
>> arch/um/include/asm/thread_info.h:47:9: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_HARDIRQ' - wrong count at exit
>> arch/um/include/asm/thread_info.h:47:9: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_NOTTHREADED_HARDIRQ' - wrong count at exit
>> arch/um/include/asm/thread_info.h:47:9: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_SOFTIRQ' - wrong count at exit
   lib/locking-selftest.c:2574:1: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_RCU' - wrong count at exit
   lib/locking-selftest.c:2574:1: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_RCU_BH' - wrong count at exit
   lib/locking-selftest.c:2574:1: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_RCU_CALLBACK' - wrong count at exit
   lib/locking-selftest.c:2574:1: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_RCU_SCHED' - wrong count at exit
   lib/locking-selftest.c:2574:1: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_RAW_SPINLOCK' - wrong count at exit
   lib/locking-selftest.c:2574:1: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_SPINLOCK' - wrong count at exit
   lib/locking-selftest.c:2574:1: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_MUTEX' - wrong count at exit
>> arch/um/include/asm/thread_info.h:47:9: sparse: sparse: context imbalance in 'SPINLOCK_in_HARDIRQ' - wrong count at exit
>> arch/um/include/asm/thread_info.h:47:9: sparse: sparse: context imbalance in 'SPINLOCK_in_NOTTHREADED_HARDIRQ' - wrong count at exit
>> arch/um/include/asm/thread_info.h:47:9: sparse: sparse: context imbalance in 'SPINLOCK_in_SOFTIRQ' - wrong count at exit
   lib/locking-selftest.c:2575:1: sparse: sparse: context imbalance in 'SPINLOCK_in_RCU' - wrong count at exit
   lib/locking-selftest.c:2575:1: sparse: sparse: context imbalance in 'SPINLOCK_in_RCU_BH' - wrong count at exit
   lib/locking-selftest.c:2575:1: sparse: sparse: context imbalance in 'SPINLOCK_in_RCU_CALLBACK' - wrong count at exit
   lib/locking-selftest.c:2575:1: sparse: sparse: context imbalance in 'SPINLOCK_in_RCU_SCHED' - wrong count at exit
   lib/locking-selftest.c:2575:1: sparse: sparse: context imbalance in 'SPINLOCK_in_RAW_SPINLOCK' - wrong count at exit
   lib/locking-selftest.c:2575:1: sparse: sparse: context imbalance in 'SPINLOCK_in_SPINLOCK' - wrong count at exit
   lib/locking-selftest.c:2575:1: sparse: sparse: context imbalance in 'SPINLOCK_in_MUTEX' - wrong count at exit
   lib/locking-selftest.c:2576:1: sparse: sparse: context imbalance in 'MUTEX_in_RCU' - wrong count at exit
   lib/locking-selftest.c:2576:1: sparse: sparse: context imbalance in 'MUTEX_in_RCU_BH' - wrong count at exit
   lib/locking-selftest.c:2576:1: sparse: sparse: context imbalance in 'MUTEX_in_RCU_SCHED' - wrong count at exit
   lib/locking-selftest.c:2576:1: sparse: sparse: context imbalance in 'MUTEX_in_RAW_SPINLOCK' - wrong count at exit
   lib/locking-selftest.c:2576:1: sparse: sparse: context imbalance in 'MUTEX_in_SPINLOCK' - wrong count at exit

vim +/RCU_in_HARDIRQ +47 arch/um/include/asm/thread_info.h

^1da177e4c3f41 include/asm-um/thread_info.h      Linus Torvalds                 2005-04-16  42  
^1da177e4c3f41 include/asm-um/thread_info.h      Linus Torvalds                 2005-04-16  43  /* how to get the thread information struct from C */
^1da177e4c3f41 include/asm-um/thread_info.h      Linus Torvalds                 2005-04-16  44  static inline struct thread_info *current_thread_info(void)
^1da177e4c3f41 include/asm-um/thread_info.h      Linus Torvalds                 2005-04-16  45  {
^1da177e4c3f41 include/asm-um/thread_info.h      Linus Torvalds                 2005-04-16  46  	struct thread_info *ti;
b3461034d7d464 include/asm-um/thread_info.h      Paolo 'Blaisorblade' Giarrusso 2005-05-28 @47  	unsigned long mask = THREAD_SIZE - 1;
534e3adbd22efa arch/um/include/asm/thread_info.h Richard Weinberger             2011-04-27  48  	void *p;
534e3adbd22efa arch/um/include/asm/thread_info.h Richard Weinberger             2011-04-27  49  
534e3adbd22efa arch/um/include/asm/thread_info.h Richard Weinberger             2011-04-27  50  	asm volatile ("" : "=r" (p) : "0" (&ti));
534e3adbd22efa arch/um/include/asm/thread_info.h Richard Weinberger             2011-04-27  51  	ti = (struct thread_info *) (((unsigned long)p) & ~mask);
^1da177e4c3f41 include/asm-um/thread_info.h      Linus Torvalds                 2005-04-16  52  	return ti;
^1da177e4c3f41 include/asm-um/thread_info.h      Linus Torvalds                 2005-04-16  53  }
^1da177e4c3f41 include/asm-um/thread_info.h      Linus Torvalds                 2005-04-16  54  

:::::: The code at line 47 was first introduced by commit
:::::: b3461034d7d46455060c8476910be22b6b0fc313 [PATCH] uml: stack dump fix

:::::: TO: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
:::::: CC: Linus Torvalds <torvalds@ppc970.osdl.org>

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

[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 11026 bytes --]