linux-kernel - Re: net/sunrpc/stats.c:204: undefined reference to `_GLOBAL_OFFSET_TABLE

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Date:   Tue, 4 Oct 2016 00:06:05 -0400 (EDT)
From:   Nicolas Pitre <nicolas.pitre@...aro.org>
To:     kbuild test robot <fengguang.wu@...el.com>
cc:     kbuild-all@...org, linux-kernel@...r.kernel.org
Subject: Re: net/sunrpc/stats.c:204: undefined reference to
 `_GLOBAL_OFFSET_TABLE_'


As I stated before, I can't reproduce this.
Please check your toolchain. It apparently throws segmentation faults.

On Sun, 2 Oct 2016, kbuild test robot wrote:

> Hi Nicolas,
> 
> FYI, the error/warning still remains.
> 
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   f51fdffad5b7709d0ade40736b58a2da2707fa15
> commit: 461a5e51060c93f5844113f4be9dba513cc92830 do_div(): generic optimization for constant divisor on 32-bit machines
> date:   11 months ago
> config: microblaze-mmu_defconfig (attached as .config)
> compiler: microblaze-linux-gcc (GCC) 6.2.0
> reproduce:
>         wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         git checkout 461a5e51060c93f5844113f4be9dba513cc92830
>         # save the attached .config to linux build tree
>         make.cross ARCH=microblaze 
> 
> All errors (new ones prefixed by >>):
> 
>    net/built-in.o: In function `rpc_print_iostats':
> >> net/sunrpc/stats.c:204: undefined reference to `_GLOBAL_OFFSET_TABLE_'
>    scripts/link-vmlinux.sh: line 52: 107322 Segmentation fault      ${LD} ${LDFLAGS} ${LDFLAGS_vmlinux} -o ${2} -T ${lds} ${KBUILD_VMLINUX_INIT} --start-group ${KBUILD_VMLINUX_MAIN} --end-group ${1}
> 
> vim +204 net/sunrpc/stats.c
> 
> 840210fc Weston Andros Adamson 2014-06-24  188  				  &stats[task->tk_msg.rpc_proc->p_statidx]);
> 840210fc Weston Andros Adamson 2014-06-24  189  }
> 0a702195 Weston Andros Adamson 2012-02-17  190  EXPORT_SYMBOL_GPL(rpc_count_iostats);
> 11c556b3 Chuck Lever           2006-03-20  191  
> ec535ce1 Adrian Bunk           2006-04-18  192  static void _print_name(struct seq_file *seq, unsigned int op,
> ec535ce1 Adrian Bunk           2006-04-18  193  			struct rpc_procinfo *procs)
> cc0175c1 Chuck Lever           2006-03-20  194  {
> cc0175c1 Chuck Lever           2006-03-20  195  	if (procs[op].p_name)
> cc0175c1 Chuck Lever           2006-03-20  196  		seq_printf(seq, "\t%12s: ", procs[op].p_name);
> cc0175c1 Chuck Lever           2006-03-20  197  	else if (op == 0)
> cc0175c1 Chuck Lever           2006-03-20  198  		seq_printf(seq, "\t        NULL: ");
> cc0175c1 Chuck Lever           2006-03-20  199  	else
> cc0175c1 Chuck Lever           2006-03-20  200  		seq_printf(seq, "\t%12u: ", op);
> cc0175c1 Chuck Lever           2006-03-20  201  }
> cc0175c1 Chuck Lever           2006-03-20  202  
> 11c556b3 Chuck Lever           2006-03-20  203  void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt)
> 11c556b3 Chuck Lever           2006-03-20 @204  {
> 11c556b3 Chuck Lever           2006-03-20  205  	struct rpc_iostats *stats = clnt->cl_metrics;
> 2446ab60 Trond Myklebust       2012-03-01  206  	struct rpc_xprt *xprt;
> 11c556b3 Chuck Lever           2006-03-20  207  	unsigned int op, maxproc = clnt->cl_maxproc;
> 11c556b3 Chuck Lever           2006-03-20  208  
> 11c556b3 Chuck Lever           2006-03-20  209  	if (!stats)
> 11c556b3 Chuck Lever           2006-03-20  210  		return;
> 11c556b3 Chuck Lever           2006-03-20  211  
> 11c556b3 Chuck Lever           2006-03-20  212  	seq_printf(seq, "\tRPC iostats version: %s  ", RPC_IOSTATS_VERS);
> 
> :::::: The code at line 204 was first introduced by commit
> :::::: 11c556b3d8d481829ab5f9933a25d29b00913b5a SUNRPC: provide a mechanism for collecting stats in the RPC client
> 
> :::::: TO: Chuck Lever <cel@...app.com>
> :::::: CC: Trond Myklebust <Trond.Myklebust@...app.com>
> 
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
>