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Fengguang WuOct 2, 2012 10:15 am 
Subject:[arm-soc:testing/defconfig-warnings 10/93] net/core/pktgen.c:682:9: sparse: undefined identifier '__do_div_asm'
From:Fengguang Wu (feng@intel.com)
Date:Oct 2, 2012 10:15:49 am
List:org.kernel.vger.kernel-janitors

Hi Arnd,

FYI, there are new sparse warnings show up in

tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc.git
testing/defconfig-warnings head: a9213257ca71d8e4411fc4056c969ca66c0653d7 commit: 66276d54c82d5a5d998bf8cbfbd244272248b644 [10/93] warnings in
net/core/pktgen.c

+ net/core/pktgen.c:682:9: sparse: undefined identifier '__do_div_asm' net/core/pktgen.c:890:30: sparse: bad constant expression net/core/pktgen.c: In function 'pktgen_if_show': net/core/pktgen.c:682:2: error: implicit declaration of function
'__do_div_asm' [-Werror=implicit-function-declaration] cc1: some warnings being treated as errors

vim +682 net/core/pktgen.c

222f1806 (Luiz Capitulino 2006-03-20 666) seq_printf(seq, "MACDST_RND "); ^1da177e (Linus Torvalds 2005-04-16 667) 34954ddc (Francesco Fondelli 2006-09-27 668) if (pkt_dev->flags & F_VID_RND) 34954ddc (Francesco Fondelli 2006-09-27 669) seq_printf(seq, "VID_RND "); 34954ddc (Francesco Fondelli 2006-09-27 670) 34954ddc (Francesco Fondelli 2006-09-27 671) if (pkt_dev->flags & F_SVID_RND) 34954ddc (Francesco Fondelli 2006-09-27 672) seq_printf(seq, "SVID_RND "); 34954ddc (Francesco Fondelli 2006-09-27 673) e99b99b4 (Robert Olsson 2010-03-18 674) if (pkt_dev->flags & F_NODE) e99b99b4 (Robert Olsson 2010-03-18 675) seq_printf(seq, "NODE_ALLOC "); e99b99b4 (Robert Olsson 2010-03-18 676) 222f1806 (Luiz Capitulino 2006-03-20 677) seq_puts(seq, "\n"); 222f1806 (Luiz Capitulino 2006-03-20 678) fd29cf72 (Stephen Hemminger 2009-08-27 679) /* not really stopped, more like
last-running-at */ fd29cf72 (Stephen Hemminger 2009-08-27 680) stopped = pkt_dev->running ?
ktime_now() : pkt_dev->stopped_at; fd29cf72 (Stephen Hemminger 2009-08-27 681) idle = pkt_dev->idle_acc; 66276d54 (Arnd Bergmann 2012-08-04 @682) __do_div_asm(idle,
NSEC_PER_USEC); ^1da177e (Linus Torvalds 2005-04-16 683) 222f1806 (Luiz Capitulino 2006-03-20 684) seq_printf(seq, fd29cf72 (Stephen Hemminger 2009-08-27 685) "Current:\n pkts-sofar:
%llu errors: %llu\n", 222f1806 (Luiz Capitulino 2006-03-20 686) (unsigned long
long)pkt_dev->sofar, fd29cf72 (Stephen Hemminger 2009-08-27 687) (unsigned long
long)pkt_dev->errors); fd29cf72 (Stephen Hemminger 2009-08-27 688) fd29cf72 (Stephen Hemminger 2009-08-27 689) seq_printf(seq, fd29cf72 (Stephen Hemminger 2009-08-27 690) " started: %lluus
stopped: %lluus idle: %lluus\n",