linux-kernel - Re: [PATCH v1 2/2] romfs: address performance regression since v3.10

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Message-ID: <202006240015.pGzlVrrz%lkp@intel.com>
Date:   Wed, 24 Jun 2020 00:16:30 +0800
From:   kernel test robot <lkp@...el.com>
To:     Sven Van Asbroeck <thesven73@...il.com>,
        linux-kernel@...r.kernel.org
Cc:     kbuild-all@...ts.01.org, Al Viro <viro@...iv.linux.org.uk>,
        Deepa Dinamani <deepa.kernel@...il.com>,
        David Howells <dhowells@...hat.com>,
        "Darrick J. Wong" <darrick.wong@...cle.com>,
        Janos Farkas <chexum+dev@...il.com>,
        Jeff Layton <jlayton@...nel.org>
Subject: Re: [PATCH v1 2/2] romfs: address performance regression since v3.10

Hi Sven,

I love your patch! Yet something to improve:

[auto build test ERROR on linux/master]
[also build test ERROR on linus/master v5.8-rc2 next-20200623]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use  as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Sven-Van-Asbroeck/address-romfs-performance-regression/20200623-085856
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 5e857ce6eae7ca21b2055cca4885545e29228fe2
config: i386-randconfig-r015-20200623 (attached as .config)
compiler: gcc-5 (Ubuntu 5.5.0-12ubuntu1) 5.5.0 20171010
reproduce (this is a W=1 build):
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   ld: fs/romfs/super.o: in function `romfs_largest_blocksize':
>> fs/romfs/super.c:505: undefined reference to `__moddi3'

vim +505 fs/romfs/super.c

   494	
   495	/*
   496	 * pick the largest blocksize which the underlying block device
   497	 * is a multiple of. Or fall back to legacy (ROMBSIZE).
   498	 */
   499	static int romfs_largest_blocksize(struct super_block *sb)
   500	{
   501		loff_t device_sz = i_size_read(sb->s_bdev->bd_inode);
   502		int blksz;
   503	
   504		for (blksz = PAGE_SIZE; blksz > ROMBSIZE; blksz >>= 1)
 > 505			if ((device_sz % blksz) == 0)
   506				break;
   507	
   508		return blksz;
   509	}
   510	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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