include/linux/spinlock.h:409:9: sparse: sparse: context imbalance in 'sunzilog_console_write' - wrong count at exit

include/linux/spinlock.h:409:9: sparse: sparse: context imbalance in 'sunzilog_console_write' - wrong count at exit

[kernel test robot]

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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:   acd3d28594536e9096c1ea76c5867d8a68babef6
commit: 997acaf6b4b59c6a9c259740312a69ea549cc684 lockdep: report broken irq restoration
date:   3 months ago
:::::: branch date: 15 hours ago
:::::: commit date: 3 months ago
config: sparc64-randconfig-s031-20210428 (attached as .config)
compiler: sparc64-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: v0.6.3-341-g8af24329-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__' W=1 ARCH=sparc64 

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/sunzilog.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 'sunzilog_console_write' - wrong count at exit

vim +/sunzilog_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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