[peterz-queue:sched/core-sched 42/43] kernel/livepatch/../sched/sched.h:2461:20: error: static declaration of 'double_rq_lock' follows non-static declaration

[peterz-queue:sched/core-sched 42/43] kernel/livepatch/../sched/sched.h:2461:20: error: static declaration of 'double_rq_lock' follows non-static declaration

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/core-sched
head:   4a2c9e0f53dc03a005b20f0355d0833b577e304b
commit: 18016992c4635b47e8494f599697d7cdcb78bdf9 [42/43] sched: Prepare to drop stop_machine() for core sched
config: x86_64-randconfig-a013-20210303 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?id=18016992c4635b47e8494f599697d7cdcb78bdf9
        git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
        git fetch --no-tags peterz-queue sched/core-sched
        git checkout 18016992c4635b47e8494f599697d7cdcb78bdf9
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

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

All errors (new ones prefixed by >>):

   In file included from kernel/livepatch/transition.c:15:
>> kernel/livepatch/../sched/sched.h:2461:20: error: static declaration of 'double_rq_lock' follows non-static declaration
    2461 | static inline void double_rq_lock(struct rq *rq1, struct rq *rq2)
         |                    ^~~~~~~~~~~~~~
   kernel/livepatch/../sched/sched.h:2331:13: note: previous declaration of 'double_rq_lock' was here
    2331 | extern void double_rq_lock(struct rq *rq1, struct rq *rq2);
         |             ^~~~~~~~~~~~~~


vim +/double_rq_lock +2461 kernel/livepatch/../sched/sched.h

029632fbb7b7c9 kernel/sched.h       Peter Zijlstra 2011-10-25  2454  
029632fbb7b7c9 kernel/sched.h       Peter Zijlstra 2011-10-25  2455  /*
029632fbb7b7c9 kernel/sched.h       Peter Zijlstra 2011-10-25  2456   * double_rq_lock - safely lock two runqueues
029632fbb7b7c9 kernel/sched.h       Peter Zijlstra 2011-10-25  2457   *
029632fbb7b7c9 kernel/sched.h       Peter Zijlstra 2011-10-25  2458   * Note this does not disable interrupts like task_rq_lock,
029632fbb7b7c9 kernel/sched.h       Peter Zijlstra 2011-10-25  2459   * you need to do so manually before calling.
029632fbb7b7c9 kernel/sched.h       Peter Zijlstra 2011-10-25  2460   */
029632fbb7b7c9 kernel/sched.h       Peter Zijlstra 2011-10-25 @2461  static inline void double_rq_lock(struct rq *rq1, struct rq *rq2)
029632fbb7b7c9 kernel/sched.h       Peter Zijlstra 2011-10-25  2462  	__acquires(rq1->lock)
029632fbb7b7c9 kernel/sched.h       Peter Zijlstra 2011-10-25  2463  	__acquires(rq2->lock)
029632fbb7b7c9 kernel/sched.h       Peter Zijlstra 2011-10-25  2464  {
029632fbb7b7c9 kernel/sched.h       Peter Zijlstra 2011-10-25  2465  	BUG_ON(!irqs_disabled());
029632fbb7b7c9 kernel/sched.h       Peter Zijlstra 2011-10-25  2466  	BUG_ON(rq1 != rq2);
d00b3b305224f4 kernel/sched/sched.h Peter Zijlstra 2021-03-02  2467  	raw_spin_rq_lock(rq1);
029632fbb7b7c9 kernel/sched.h       Peter Zijlstra 2011-10-25  2468  	__acquire(rq2->lock);	/* Fake it out ;) */
029632fbb7b7c9 kernel/sched.h       Peter Zijlstra 2011-10-25  2469  }
029632fbb7b7c9 kernel/sched.h       Peter Zijlstra 2011-10-25  2470  

:::::: The code at line 2461 was first introduced by commit
:::::: 029632fbb7b7c9d85063cc9eb470de6c54873df3 sched: Make separate sched*.c translation units

:::::: TO: Peter Zijlstra <a.p.zijlstra@chello.nl>
:::::: CC: Ingo Molnar <mingo@elte.hu>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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