Hi Jieun,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on dm/for-next]
[also build test ERROR on v5.4 next-20191129]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    
https://github.com/0day-ci/linux/commits/Jieun-Kim/drivers-md-dm-log-c-Remove-unused-variable-sz/20191201-134548
base:   
https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git 
for-next
config: i386-defconfig (attached as .config)
compiler: gcc-7 (Debian 7.5.0-1) 7.5.0
reproduce:
        # 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 <[email protected]>

All error/warnings (new ones prefixed by >>):

   In file included from include/linux/dm-dirty-log.h:16:0,
                    from drivers/md/dm-log.c:13:
   drivers/md/dm-log.c: In function 'core_status':
>> include/linux/device-mapper.h:551:22: error: 'sz' undeclared (first use in 
>> this function); did you mean 's8'?
    #define DMEMIT(x...) sz += ((sz >= maxlen) ? \
                         ^
>> drivers/md/dm-log.c:788:3: note: in expansion of macro 'DMEMIT'
      DMEMIT("1 %s", log->type->name);
      ^~~~~~
   include/linux/device-mapper.h:551:22: note: each undeclared identifier is 
reported only once for each function it appears in
    #define DMEMIT(x...) sz += ((sz >= maxlen) ? \
                         ^
>> drivers/md/dm-log.c:788:3: note: in expansion of macro 'DMEMIT'
      DMEMIT("1 %s", log->type->name);
      ^~~~~~
--
   In file included from include/linux/dm-dirty-log.h:16:0,
                    from drivers//md/dm-log.c:13:
   drivers//md/dm-log.c: In function 'core_status':
>> include/linux/device-mapper.h:551:22: error: 'sz' undeclared (first use in 
>> this function); did you mean 's8'?
    #define DMEMIT(x...) sz += ((sz >= maxlen) ? \
                         ^
   drivers//md/dm-log.c:788:3: note: in expansion of macro 'DMEMIT'
      DMEMIT("1 %s", log->type->name);
      ^~~~~~
   include/linux/device-mapper.h:551:22: note: each undeclared identifier is 
reported only once for each function it appears in
    #define DMEMIT(x...) sz += ((sz >= maxlen) ? \
                         ^
   drivers//md/dm-log.c:788:3: note: in expansion of macro 'DMEMIT'
      DMEMIT("1 %s", log->type->name);
      ^~~~~~

vim +/DMEMIT +788 drivers/md/dm-log.c

^1da177e4c3f41 Linus Torvalds     2005-04-16  776  
^1da177e4c3f41 Linus Torvalds     2005-04-16  777  #define      DMEMIT_SYNC \
^1da177e4c3f41 Linus Torvalds     2005-04-16  778       if (lc->sync != 
DEFAULTSYNC) \
^1da177e4c3f41 Linus Torvalds     2005-04-16  779               DMEMIT("%ssync 
", lc->sync == NOSYNC ? "no" : "")
^1da177e4c3f41 Linus Torvalds     2005-04-16  780  
416cd17b198221 Heinz Mauelshagen  2008-04-24  781  static int 
core_status(struct dm_dirty_log *log, status_type_t status,
^1da177e4c3f41 Linus Torvalds     2005-04-16  782                      char 
*result, unsigned int maxlen)
^1da177e4c3f41 Linus Torvalds     2005-04-16  783  {
^1da177e4c3f41 Linus Torvalds     2005-04-16  784       struct log_c *lc = 
log->context;
^1da177e4c3f41 Linus Torvalds     2005-04-16  785  
^1da177e4c3f41 Linus Torvalds     2005-04-16  786       switch(status) {
^1da177e4c3f41 Linus Torvalds     2005-04-16  787       case STATUSTYPE_INFO:
315dcc226f066c Jonathan E Brassow 2007-05-09 @788               DMEMIT("1 %s", 
log->type->name);
^1da177e4c3f41 Linus Torvalds     2005-04-16  789               break;
^1da177e4c3f41 Linus Torvalds     2005-04-16  790  
^1da177e4c3f41 Linus Torvalds     2005-04-16  791       case STATUSTYPE_TABLE:
^1da177e4c3f41 Linus Torvalds     2005-04-16  792               DMEMIT("%s %u 
%u ", log->type->name,
^1da177e4c3f41 Linus Torvalds     2005-04-16  793                      lc->sync 
== DEFAULTSYNC ? 1 : 2, lc->region_size);
^1da177e4c3f41 Linus Torvalds     2005-04-16  794               DMEMIT_SYNC;
^1da177e4c3f41 Linus Torvalds     2005-04-16  795       }
^1da177e4c3f41 Linus Torvalds     2005-04-16  796  
2a79ee10b97355 Jieun Kim          2019-12-01  797       return 0;
^1da177e4c3f41 Linus Torvalds     2005-04-16  798  }
^1da177e4c3f41 Linus Torvalds     2005-04-16  799  

:::::: The code at line 788 was first introduced by commit
:::::: 315dcc226f066c1d3cef79283dcde807fe0e32d1 dm log: report fault status

:::::: TO: Jonathan E Brassow <[email protected]>
:::::: CC: Linus Torvalds <[email protected]>

---
0-DAY kernel test infrastructure                 Open Source Technology Center
https://lists.01.org/hyperkitty/list/[email protected] Intel Corporation

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