Re: [PATCH] dm: remove unneeded variable

[kernel test robot <lkp@intel.com>]

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Hi,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on device-mapper-dm/for-next]
[also build test ERROR on v5.15 next-20211111]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/cgel-zte-gmail-com/dm-remove-unneeded-variable/20211111-155437
base:   https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git for-next
config: i386-debian-10.3 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/dbcfa76d0a7e2af056369733ed58150e479ec0c7
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review cgel-zte-gmail-com/dm-remove-unneeded-variable/20211111-155437
        git checkout dbcfa76d0a7e2af056369733ed58150e479ec0c7
        # save the attached .config to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/md/

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

All errors (new ones prefixed by >>):

   In file included from drivers/md/dm-ps-round-robin.c:12:
   drivers/md/dm-ps-round-robin.c: In function 'rr_status':
>> include/linux/device-mapper.h:602:22: error: 'sz' undeclared (first use in this function); did you mean 's8'?
     602 | #define DMEMIT(x...) sz += ((sz >= maxlen) ? \
         |                      ^~
   drivers/md/dm-ps-round-robin.c:93:3: note: in expansion of macro 'DMEMIT'
      93 |   DMEMIT("0 ");
         |   ^~~~~~
   include/linux/device-mapper.h:602:22: note: each undeclared identifier is reported only once for each function it appears in
     602 | #define DMEMIT(x...) sz += ((sz >= maxlen) ? \
         |                      ^~
   drivers/md/dm-ps-round-robin.c:93:3: note: in expansion of macro 'DMEMIT'
      93 |   DMEMIT("0 ");
         |   ^~~~~~


vim +602 include/linux/device-mapper.h

0da336e5fab75c Alasdair G Kergon 2008-04-24  601  
0da336e5fab75c Alasdair G Kergon 2008-04-24 @602  #define DMEMIT(x...) sz += ((sz >= maxlen) ? \
0da336e5fab75c Alasdair G Kergon 2008-04-24  603  			  0 : scnprintf(result + sz, maxlen - sz, x))
0da336e5fab75c Alasdair G Kergon 2008-04-24  604  

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

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