linux-kernel - [rcu:rcu/next 96/97] include/linux/rcutiny.h:120:20: error: static declaration of 'rcu_scheduler

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Date:   Wed, 31 May 2017 14:26:52 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org
Subject: [rcu:rcu/next 96/97] include/linux/rcutiny.h:120:20: error: static
 declaration of 'rcu_scheduler_starting' follows non-static declaration

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next
head:   8995eb05b8c6f9bde96bc2713ec9b7bb9072093f
commit: 32bc295e22be3b484ee3324f6aeeaae93234c429 [96/97] srcu: Move rcu_scheduler_starting() from Tiny RCU to Tiny SRCU
config: sparc64-allnoconfig (attached as .config)
compiler: sparc64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 32bc295e22be3b484ee3324f6aeeaae93234c429
        # save the attached .config to linux build tree
        make.cross ARCH=sparc64 

All errors (new ones prefixed by >>):

   warning: (COMPAT) selects COMPAT_BINFMT_ELF which has unmet direct dependencies (COMPAT && BINFMT_ELF)
   warning: (COMPAT) selects COMPAT_BINFMT_ELF which has unmet direct dependencies (COMPAT && BINFMT_ELF)
   In file included from include/linux/rcupdate.h:211:0,
                    from include/linux/rculist.h:10,
                    from include/linux/pid.h:4,
                    from include/linux/sched.h:13,
                    from arch/sparc/kernel/asm-offsets.c:13:
>> include/linux/rcutiny.h:120:20: error: static declaration of 'rcu_scheduler_starting' follows non-static declaration
    static inline void rcu_scheduler_starting(void) { }
                       ^~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/rculist.h:10:0,
                    from include/linux/pid.h:4,
                    from include/linux/sched.h:13,
                    from arch/sparc/kernel/asm-offsets.c:13:
   include/linux/rcupdate.h:106:6: note: previous declaration of 'rcu_scheduler_starting' was here
    void rcu_scheduler_starting(void);
         ^~~~~~~~~~~~~~~~~~~~~~
   make[2]: *** [arch/sparc/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [sub-make] Error 2

vim +/rcu_scheduler_starting +120 include/linux/rcutiny.h

5fde209e Paul E. McKenney 2017-05-03  114  static inline bool rcu_irq_enter_disabled(void) { return false; }
5fde209e Paul E. McKenney 2017-05-03  115  static inline void rcu_irq_exit_irqson(void) { }
5fde209e Paul E. McKenney 2017-05-03  116  static inline void rcu_irq_enter_irqson(void) { }
5fde209e Paul E. McKenney 2017-05-03  117  static inline void rcu_irq_exit(void) { }
5fde209e Paul E. McKenney 2017-05-03  118  static inline void exit_rcu(void) { }
32bc295e Paul E. McKenney 2017-05-26  119  #ifndef CONFIG_SRCU
5fde209e Paul E. McKenney 2017-05-03 @120  static inline void rcu_scheduler_starting(void) { }
32bc295e Paul E. McKenney 2017-05-26  121  #endif /* #ifndef CONFIG_SRCU */
ddeb83e7 Paul E. McKenney 2017-05-11  122  static inline void rcu_end_inkernel_boot(void) { }
5fde209e Paul E. McKenney 2017-05-03  123  static inline bool rcu_is_watching(void) { return true; }

:::::: The code at line 120 was first introduced by commit
:::::: 5fde209ef72d68e8a955e434753258eb33f85431 rcu: Move rcutiny.h to new empty/true/false-function style

:::::: TO: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
:::::: CC: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>

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