[ti:ti-rt-linux-5.4.y 1/1] drivers/connector/cn_proc.c:44:30: warning: unused variable 'send_msg_lock'

From: kernel test robot <lkp@intel.com>
To: kbuild-all@lists.01.org
Subject: [ti:ti-rt-linux-5.4.y 1/1] drivers/connector/cn_proc.c:44:30: warning: unused variable 'send_msg_lock'
Date: Sat, 09 Jan 2021 14:41:03 +0800	[thread overview]
Message-ID: <202101091454.cwmqZpzr-lkp@intel.com> (raw)

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tree:   git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git ti-rt-linux-5.4.y
head:   1c4ef1e41fb51274466edfe7c3ad292490194e1b
commit: 1c4ef1e41fb51274466edfe7c3ad292490194e1b [1/1] Merged TI feature ti_linux_base_rt into ti-rt-linux-5.4.y
config: x86_64-randconfig-a014-20210108 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project bc556e5685c0f97e79fb7b3c6f15cc5062db8e36)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        git remote add ti git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git
        git fetch --no-tags ti ti-rt-linux-5.4.y
        git checkout 1c4ef1e41fb51274466edfe7c3ad292490194e1b
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

>> drivers/connector/cn_proc.c:44:30: warning: unused variable 'send_msg_lock' [-Wunused-const-variable]
   static DEFINE_LOCAL_IRQ_LOCK(send_msg_lock);
                                ^
   1 warning generated.

vim +/send_msg_lock +44 drivers/connector/cn_proc.c

9f46080c41d5f3f7 Matt Helsley    2005-11-07  41  
cc398c2eae35b13d David S. Miller 2006-01-08  42  /* proc_event_counts is used as the sequence number of the netlink message */
9f46080c41d5f3f7 Matt Helsley    2005-11-07  43  static DEFINE_PER_CPU(__u32, proc_event_counts) = { 0 };
78412101a2241094 Mike Galbraith  2016-10-16 @44  static DEFINE_LOCAL_IRQ_LOCK(send_msg_lock);
9f46080c41d5f3f7 Matt Helsley    2005-11-07  45  

:::::: The code at line 44 was first introduced by commit
:::::: 78412101a22410944389c3bbc954ba97a0f47e0f connector/cn_proc: Protect send_msg() with a local lock on RT

:::::: TO: Mike Galbraith <umgwanakikbuti@gmail.com>
:::::: CC: Sebastian Andrzej Siewior <bigeasy@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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