Re: [PATCH -next v2 2/2] blk-throttle: fix io hung due to configuration updates

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在 2022/05/19 10:11, yukuai (C) 写道:


在 2022/05/18 23:52, kernel test robot 写道:
Hi Yu,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on next-20220517]

url: https://github.com/intel-lab-lkp/linux/commits/Yu-Kuai/bugfix-for-blk-throttle/20220518-151713
base:    47c1c54d1bcd0a69a56b49473bc20f17b70e5242
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20220518/202205182347.tMOOqyfL-lkp@xxxxxxxxx/config)
compiler: m68k-linux-gcc (GCC) 11.3.0
reproduce (this is a W=1 build):
         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
         chmod +x ~/bin/make.cross
         # https://github.com/intel-lab-lkp/linux/commit/f8345dbaf4ed491742aab29834aff66b4930c087          git remote add linux-review https://github.com/intel-lab-lkp/linux          git fetch --no-tags linux-review Yu-Kuai/bugfix-for-blk-throttle/20220518-151713
         git checkout f8345dbaf4ed491742aab29834aff66b4930c087
         # save the config file
         mkdir build_dir && cp config build_dir/.config
         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

    m68k-linux-ld: block/blk-throttle.o: in function `tg_conf_updated':
blk-throttle.c:(.text+0x25bc): undefined reference to `__udivdi3'
m68k-linux-ld: blk-throttle.c:(.text+0x2626): undefined reference to `__udivdi3'
Hi,

I'm confused here, the only place that I can relate to this:

     return dispatched * new_limit / old_limit;

I understand it now. I'm doing (u64 / u64), I should use div64_u64
However, I don't understand yet why this is problematic...
    `.exit.text' referenced in section `.data' of sound/soc/codecs/tlv320adc3xxx.o: defined in discarded section `.exit.text' of sound/soc/codecs/tlv320adc3xxx.o




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