linux-kernel - [paulmck-rcu:dev.2023.08.24a 72/74] kernel/locking/qspinlock.c:779:23: warning: no previous declaration for '__pv_spinlock

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Message-ID: <202309032246.VhgyldbK-lkp@intel.com>
Date:   Sun, 3 Sep 2023 22:30:29 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: [paulmck-rcu:dev.2023.08.24a 72/74]
 kernel/locking/qspinlock.c:779:23: warning: no previous declaration for
 '__pv_spinlock_dump'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2023.08.24a
head:   ed763051f63059bdb6d728c0890993eab8833feb
commit: c0aaeb8f1165a2624a6ed4d8c2a5f340e4b91158 [72/74] squash! EXP qspinlock: Dump lock state, add call from locktorture
config: x86_64-randconfig-003-20230903 (https://download.01.org/0day-ci/archive/20230903/202309032246.VhgyldbK-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230903/202309032246.VhgyldbK-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309032246.VhgyldbK-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from kernel/locking/qspinlock.c:784:0:
   kernel/locking/qspinlock_paravirt.h:493:1: warning: no previous declaration for '__pv_queued_spin_unlock_slowpath' [-Wmissing-declarations]
    __pv_queued_spin_unlock_slowpath(struct qspinlock *lock, u8 locked)
    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from kernel/locking/qspinlock.c:785:0:
   kernel/locking/qspinlock.c:691:29: error: redefinition of 'next_to_cpu_idx'
    static struct mcs_spinlock *next_to_cpu_idx(struct mcs_spinlock *msp, int *cpup, int *idxp)
                                ^~~~~~~~~~~~~~~
   kernel/locking/qspinlock.c:691:29: note: previous definition of 'next_to_cpu_idx' was here
    static struct mcs_spinlock *next_to_cpu_idx(struct mcs_spinlock *msp, int *cpup, int *idxp)
                                ^~~~~~~~~~~~~~~
>> kernel/locking/qspinlock.c:779:23: warning: no previous declaration for '__pv_spinlock_dump' [-Wmissing-declarations]
    #define spinlock_dump __pv_spinlock_dump
                          ^
   kernel/locking/qspinlock.c:712:6: note: in expansion of macro 'spinlock_dump'
    void spinlock_dump(spinlock_t *sp, bool full)
         ^~~~~~~~~~~~~

vim +/__pv_spinlock_dump +779 kernel/locking/qspinlock.c

   775	
   776	#undef  queued_spin_lock_slowpath
   777	#define queued_spin_lock_slowpath	__pv_queued_spin_lock_slowpath
   778	#define queued_spin_lock_slowpath_diags	__pv_queued_spin_lock_slowpath_diags
 > 779	#define spinlock_dump	__pv_spinlock_dump
   780	#define tail_to_cpu	__pv_tail_to_cpu
   781	#define tail_to_idx	__pv_tail_to_idx
   782	#define next_to_prev	__pv_next_to_prev
   783	

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