From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Subject: include/linux/spinlock.h:409:9: sparse: sparse: context imbalance in 'sunsab_console_write' - wrong count at exit
Date: Sun, 28 Feb 2021 03:13:02 +0800 [thread overview]
Message-ID: <202102280354.smPmLmZW-lkp@intel.com> (raw)
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CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Mark Rutland <mark.rutland@arm.com>
CC: Peter Zijlstra <peterz@infradead.org>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 5695e51619745d4fe3ec2506a2f0cd982c5e27a4
commit: 997acaf6b4b59c6a9c259740312a69ea549cc684 lockdep: report broken irq restoration
date: 5 weeks ago
:::::: branch date: 3 hours ago
:::::: commit date: 5 weeks ago
config: sparc-randconfig-s031-20210228 (attached as .config)
compiler: sparc-linux-gcc (GCC) 9.3.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.3-241-geaceeafa-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=997acaf6b4b59c6a9c259740312a69ea549cc684
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 997acaf6b4b59c6a9c259740312a69ea549cc684
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=sparc
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 >>)"
drivers/tty/serial/sunsab.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/umh.h, include/linux/kmod.h, ...):
>> include/linux/spinlock.h:409:9: sparse: sparse: context imbalance in 'sunsab_console_write' - wrong count at exit
vim +/sunsab_console_write +409 include/linux/spinlock.h
c2f21ce2e31286 Thomas Gleixner 2009-12-02 406
3490565b633c70 Denys Vlasenko 2015-07-13 407 static __always_inline void spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags)
c2f21ce2e31286 Thomas Gleixner 2009-12-02 408 {
c2f21ce2e31286 Thomas Gleixner 2009-12-02 @409 raw_spin_unlock_irqrestore(&lock->rlock, flags);
c2f21ce2e31286 Thomas Gleixner 2009-12-02 410 }
c2f21ce2e31286 Thomas Gleixner 2009-12-02 411
:::::: The code at line 409 was first introduced by commit
:::::: c2f21ce2e31286a0a32f8da0a7856e9ca1122ef3 locking: Implement new raw_spinlock
:::::: TO: Thomas Gleixner <tglx@linutronix.de>
:::::: CC: Thomas Gleixner <tglx@linutronix.de>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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