linux-kernel - net/sched/sch_dsmark.c:316:1: error: unrecognizable insn:

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Date:	Sun, 28 Feb 2016 22:15:19 +0800
From:	kbuild test robot <fengguang.wu@...el.com>
To:	Eric Dumazet <edumazet@...gle.com>
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org
Subject: net/sched/sch_dsmark.c:316:1: error: unrecognizable insn:

Hi Eric,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   12b9fa6a97b3150477ab182e321be512b59fa899
commit: 47bbbb30b4331ec58a74a66a044341f0114b02b3 sch_dsmark: improve memory locality
date:   5 months ago
config: cris-allmodconfig (attached as .config)
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 47bbbb30b4331ec58a74a66a044341f0114b02b3
        # save the attached .config to linux build tree
        make.cross ARCH=cris 

All errors (new ones prefixed by >>):

   net/sched/sch_dsmark.c: In function 'dsmark_dequeue':
>> net/sched/sch_dsmark.c:316:1: error: unrecognizable insn:
   (insn 245 244 119 15 (set (reg:QI 11 r11 [179])
           (and:QI (mem/s/j:QI (reg/f:SI 2 r2 [orig:48 D.44547 ] [48]) [0 D.44547_34->mask+0 S1 A8])
               (reg:QI 11 r11 [179]))) include/net/dsfield.h:33 -1
        (nil))
   net/sched/sch_dsmark.c:316:1: internal compiler error: in extract_insn, at recog.c:2109
   Please submit a full bug report,
   with preprocessed source if appropriate.
   See <http://gcc.gnu.org/bugs.html> for instructions.

vim +316 net/sched/sch_dsmark.c

c76f2a2c4 Yang Yingliang    2013-12-23  310  			pr_warn("%s: unsupported protocol %d\n",
d8b9605d2 Jiri Pirko        2015-01-13  311  				__func__, ntohs(tc_skb_protocol(skb)));
^1da177e4 Linus Torvalds    2005-04-16  312  		break;
3ff50b799 Stephen Hemminger 2007-04-20  313  	}
af0d11417 Thomas Graf       2005-06-18  314  
^1da177e4 Linus Torvalds    2005-04-16  315  	return skb;
^1da177e4 Linus Torvalds    2005-04-16 @316  }
^1da177e4 Linus Torvalds    2005-04-16  317  
8e3af9789 Jarek Poplawski   2008-10-31  318  static struct sk_buff *dsmark_peek(struct Qdisc *sch)
8e3af9789 Jarek Poplawski   2008-10-31  319  {

:::::: The code at line 316 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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