From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Subject: arch/um/include/asm/thread_info.h:47:9: sparse: sparse: context imbalance in 'RCU_in_HARDIRQ' - wrong count at exit
Date: Mon, 10 May 2021 22:22:37 +0800 [thread overview]
Message-ID: <202105102227.2lH6jlAI-lkp@intel.com> (raw)
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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
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