[tty:tty-next 76/81] include/linux/spinlock.h:394:9: sparse: sparse: context imbalance in 'bcm_console_write' - unexpected unlock

[tty:tty-next 76/81] include/linux/spinlock.h:394:9: sparse: sparse: context imbalance in 'bcm_console_write' - unexpected unlock

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
CC: linux-serial(a)vger.kernel.org
TO: "Rafał Miłecki" <rafal@milecki.pl>
CC: "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-next
head:   e0efb3168d34dc8c8c72718672b8902e40efff8f
commit: f35a07f92616700733636c06dd6e5b6cdc807fe4 [76/81] tty: serial: bcm63xx: lower driver dependencies
:::::: branch date: 26 hours ago
:::::: commit date: 9 days ago
config: openrisc-randconfig-s031-20201206 (attached as .config)
compiler: or1k-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: v0.6.3-179-ga00755aa-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git/commit/?id=f35a07f92616700733636c06dd6e5b6cdc807fe4
        git remote add tty https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
        git fetch --no-tags tty tty-next
        git checkout f35a07f92616700733636c06dd6e5b6cdc807fe4
        # 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=openrisc 

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/bcm63xx_uart.c: note: in included file (through include/linux/wait.h, include/linux/pid.h, include/linux/sched.h, ...):
>> include/linux/spinlock.h:394:9: sparse: sparse: context imbalance in 'bcm_console_write' - unexpected unlock

vim +/bcm_console_write +394 include/linux/spinlock.h

c2f21ce2e31286 Thomas Gleixner 2009-12-02  391  
3490565b633c70 Denys Vlasenko  2015-07-13  392  static __always_inline void spin_unlock(spinlock_t *lock)
c2f21ce2e31286 Thomas Gleixner 2009-12-02  393  {
c2f21ce2e31286 Thomas Gleixner 2009-12-02 @394  	raw_spin_unlock(&lock->rlock);
c2f21ce2e31286 Thomas Gleixner 2009-12-02  395  }
c2f21ce2e31286 Thomas Gleixner 2009-12-02  396  

:::::: The code at line 394 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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