On 10/17/19 2:44 AM, kbuild test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head:   3ef845da3c3b180ddd386e228ac3228d84a522d3
> commit: df72b71921195015e3a8ce772a9ad79442bf0de3 [4732/5057] soundwire: intel: add missing headers for cross-compilation
> config: i386-randconfig-f004-201941 (attached as .config)
> compiler: gcc-7 (Debian 7.4.0-13) 7.4.0
> reproduce:
>          git checkout df72b71921195015e3a8ce772a9ad79442bf0de3
>          # save the attached .config to linux build tree
>          make ARCH=i386
> 
> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <lkp@intel.com>
> 
> All errors (new ones prefixed by >>):
> 
>     In file included from drivers//soundwire/intel_init.c:12:0:
>     include/linux/iomap.h: In function 'iomap_sector':
>>> include/linux/iomap.h:76:48: error: 'SECTOR_SHIFT' undeclared (first use in this function); did you mean 'S_DT_SHIFT'?
>       return (iomap->addr + pos - iomap->offset) >> SECTOR_SHIFT;
>                                                     ^~~~~~~~~~~~
>                                                     S_DT_SHIFT

SECTOR_SHIFT is defined if CONFIG_BLOCK is selected. It isn't selected 
in this config, so that's probably a dependency that needs to be captured.

Alternatively, maybe we should use readl instead, not sure why ioread32 
was used in the first place?


>     include/linux/iomap.h:76:48: note: each undeclared identifier is reported only once for each function it appears in
> 
> vim +76 include/linux/iomap.h
> 
> 63899c6f8851c3 Christoph Hellwig 2018-06-19  72
> db074436f42196 Darrick J. Wong   2019-07-15  73  static inline sector_t
> db074436f42196 Darrick J. Wong   2019-07-15  74  iomap_sector(struct iomap *iomap, loff_t pos)
> db074436f42196 Darrick J. Wong   2019-07-15  75  {
> db074436f42196 Darrick J. Wong   2019-07-15 @76  	return (iomap->addr + pos - iomap->offset) >> SECTOR_SHIFT;
> db074436f42196 Darrick J. Wong   2019-07-15  77  }
> db074436f42196 Darrick J. Wong   2019-07-15  78
> 
> :::::: The code at line 76 was first introduced by commit
> :::::: db074436f421967f4f30cfbb6fbc2a728f3e62b3 iomap: move the direct IO code into a separate file
> 
> :::::: TO: Darrick J. Wong <darrick.wong@oracle.com>
> :::::: CC: Darrick J. Wong <darrick.wong@oracle.com>
> 
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
>