linux-kernel - Re: [PATCH 1/4] sched,time: remove non-power-of-two divides from __acct_update

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Date:	Mon, 1 Feb 2016 12:46:39 +0800
From:	kbuild test robot <lkp@...el.com>
To:	riel@...hat.com
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org,
	fweisbec@...il.com, tglx@...utronix.de, mingo@...nel.org,
	luto@...capital.net, peterz@...radead.org, clark@...hat.com
Subject: Re: [PATCH 1/4] sched,time: remove non-power-of-two divides from
 __acct_update_integrals

Hi Rik,

[auto build test ERROR on tip/sched/core]
[also build test ERROR on v4.5-rc2 next-20160129]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/riel-redhat-com/sched-time-reduce-nohz_full-syscall-overhead-40/20160201-101609
config: sh-sh7757lcr_defconfig (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
        # save the attached .config to linux build tree
        make.cross ARCH=sh 

All errors (new ones prefixed by >>):

   kernel/built-in.o: In function `get_mm_hiwater_vm':
>> include/linux/mm.h:1377: undefined reference to `__udivdi3'

vim +1377 include/linux/mm.h

172703b0 Matt Fleming      2011-05-24  1361  	atomic_long_dec(&mm->rss_stat.count[member]);
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1362  }
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1363  
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1364  static inline unsigned long get_mm_rss(struct mm_struct *mm)
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1365  {
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1366  	return get_mm_counter(mm, MM_FILEPAGES) +
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1367  		get_mm_counter(mm, MM_ANONPAGES);
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1368  }
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1369  
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1370  static inline unsigned long get_mm_hiwater_rss(struct mm_struct *mm)
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1371  {
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1372  	return max(mm->hiwater_rss, get_mm_rss(mm));
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1373  }
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1374  
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1375  static inline unsigned long get_mm_hiwater_vm(struct mm_struct *mm)
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1376  {
d559db08 KAMEZAWA Hiroyuki 2010-03-05 @1377  	return max(mm->hiwater_vm, mm->total_vm);
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1378  }
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1379  
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1380  static inline void update_hiwater_rss(struct mm_struct *mm)
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1381  {
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1382  	unsigned long _rss = get_mm_rss(mm);
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1383  
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1384  	if ((mm)->hiwater_rss < _rss)
d559db08 KAMEZAWA Hiroyuki 2010-03-05  1385  		(mm)->hiwater_rss = _rss;

:::::: The code at line 1377 was first introduced by commit
:::::: d559db086ff5be9bcc259e5aa50bf3d881eaf1d1 mm: clean up mm_counter

:::::: TO: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
:::::: CC: Linus Torvalds <torvalds@...ux-foundation.org>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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