linux-kernel - [rcu:rcu/dev 87/87] arch/powerpc/include/asm/atomic.h:133:24: error: static declaration of 'atomic

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Date:   Fri, 5 May 2017 05:10:57 +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/dev 87/87] arch/powerpc/include/asm/atomic.h:133:24: error:
 static declaration of 'atomic_inc' follows non-static declaration

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/dev
head:   79a19fc3bea151903aaa19fc360f27379ab9c204
commit: 79a19fc3bea151903aaa19fc360f27379ab9c204 [87/87] rcu: Move ktime needs to rcutiny.h and remove ktime.h from rcupdate.h
config: powerpc-defconfig (attached as .config)
compiler: powerpc64-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 79a19fc3bea151903aaa19fc360f27379ab9c204
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc 

All error/warnings (new ones prefixed by >>):

   In file included from include/linux/sched.h:13:0,
                    from arch/powerpc/kernel/asm-offsets.c:17:
   include/linux/pid.h: In function 'get_pid':
   include/linux/pid.h:78:3: error: implicit declaration of function 'atomic_inc' [-Werror=implicit-function-declaration]
      atomic_inc(&pid->count);
      ^~~~~~~~~~
   In file included from include/linux/atomic.h:4:0,
                    from include/linux/sem.h:4,
                    from include/linux/sched.h:14,
                    from arch/powerpc/kernel/asm-offsets.c:17:
   arch/powerpc/include/asm/atomic.h: At top level:
>> arch/powerpc/include/asm/atomic.h:133:24: warning: conflicting types for 'atomic_inc'
    static __inline__ void atomic_inc(atomic_t *v)
                           ^~~~~~~~~~
>> arch/powerpc/include/asm/atomic.h:133:24: error: static declaration of 'atomic_inc' follows non-static declaration
   In file included from include/linux/sched.h:13:0,
                    from arch/powerpc/kernel/asm-offsets.c:17:
   include/linux/pid.h:78:3: note: previous implicit declaration of 'atomic_inc' was here
      atomic_inc(&pid->count);
      ^~~~~~~~~~
   cc1: some warnings being treated as errors
   make[2]: *** [arch/powerpc/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 +/atomic_inc +133 arch/powerpc/include/asm/atomic.h

a28cc7bb arch/powerpc/include/asm/atomic.h Peter Zijlstra 2016-04-18  117  
a28cc7bb arch/powerpc/include/asm/atomic.h Peter Zijlstra 2016-04-18  118  ATOMIC_OPS(and, and)
a28cc7bb arch/powerpc/include/asm/atomic.h Peter Zijlstra 2016-04-18  119  ATOMIC_OPS(or, or)
a28cc7bb arch/powerpc/include/asm/atomic.h Peter Zijlstra 2016-04-18  120  ATOMIC_OPS(xor, xor)
a28cc7bb arch/powerpc/include/asm/atomic.h Peter Zijlstra 2016-04-18  121  
a28cc7bb arch/powerpc/include/asm/atomic.h Peter Zijlstra 2016-04-18  122  #define atomic_fetch_and_relaxed atomic_fetch_and_relaxed
a28cc7bb arch/powerpc/include/asm/atomic.h Peter Zijlstra 2016-04-18  123  #define atomic_fetch_or_relaxed  atomic_fetch_or_relaxed
a28cc7bb arch/powerpc/include/asm/atomic.h Peter Zijlstra 2016-04-18  124  #define atomic_fetch_xor_relaxed atomic_fetch_xor_relaxed
a28cc7bb arch/powerpc/include/asm/atomic.h Peter Zijlstra 2016-04-18  125  
af095dd6 arch/powerpc/include/asm/atomic.h Peter Zijlstra 2014-03-26  126  #undef ATOMIC_OPS
a28cc7bb arch/powerpc/include/asm/atomic.h Peter Zijlstra 2016-04-18  127  #undef ATOMIC_FETCH_OP_RELAXED
dc53617c arch/powerpc/include/asm/atomic.h Boqun Feng     2016-01-06  128  #undef ATOMIC_OP_RETURN_RELAXED
af095dd6 arch/powerpc/include/asm/atomic.h Peter Zijlstra 2014-03-26  129  #undef ATOMIC_OP
^1da177e include/asm-ppc/atomic.h          Linus Torvalds 2005-04-16  130  
^1da177e include/asm-ppc/atomic.h          Linus Torvalds 2005-04-16  131  #define atomic_add_negative(a, v)	(atomic_add_return((a), (v)) < 0)
^1da177e include/asm-ppc/atomic.h          Linus Torvalds 2005-04-16  132  
^1da177e include/asm-ppc/atomic.h          Linus Torvalds 2005-04-16 @133  static __inline__ void atomic_inc(atomic_t *v)
^1da177e include/asm-ppc/atomic.h          Linus Torvalds 2005-04-16  134  {
^1da177e include/asm-ppc/atomic.h          Linus Torvalds 2005-04-16  135  	int t;
^1da177e include/asm-ppc/atomic.h          Linus Torvalds 2005-04-16  136  
^1da177e include/asm-ppc/atomic.h          Linus Torvalds 2005-04-16  137  	__asm__ __volatile__(
^1da177e include/asm-ppc/atomic.h          Linus Torvalds 2005-04-16  138  "1:	lwarx	%0,0,%2		# atomic_inc\n\
^1da177e include/asm-ppc/atomic.h          Linus Torvalds 2005-04-16  139  	addic	%0,%0,1\n"
^1da177e include/asm-ppc/atomic.h          Linus Torvalds 2005-04-16  140  	PPC405_ERR77(0,%2)
^1da177e include/asm-ppc/atomic.h          Linus Torvalds 2005-04-16  141  "	stwcx.	%0,0,%2 \n\

:::::: The code at line 133 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>

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