Hi Chao,

I love your patch! Perhaps something to improve:

[auto build test WARNING on f2fs/dev-test]
[also build test WARNING on v5.8-rc3 next-20200629]
[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/Chao-Yu/f2fs-fix-wrong-return-value-of-f2fs_bmap_compress/20200628-203231
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git dev-test
config: s390-allyesconfig (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0
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
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 

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

All warnings (new ones prefixed by >>):

   In file included from include/trace/define_trace.h:102,
                    from include/trace/events/f2fs.h:1924,
                    from fs/f2fs/super.c:37:
   include/trace/events/f2fs.h: In function 'trace_raw_output_f2fs_bmap':
>> include/trace/events/f2fs.h:1914:12: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'ino_t' {aka 'unsigned int'} [-Wformat=]
    1914 |  TP_printk("dev = (%d,%d), ino = %lu, lblock:%lld, pblock:%lld",
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/trace/trace_events.h:368:22: note: in definition of macro 'DECLARE_EVENT_CLASS'
     368 |  trace_seq_printf(s, print);     \
         |                      ^~~~~
   include/trace/trace_events.h:80:9: note: in expansion of macro 'PARAMS'
      80 |         PARAMS(print));         \
         |         ^~~~~~
   include/trace/events/f2fs.h:1894:1: note: in expansion of macro 'TRACE_EVENT'
    1894 | TRACE_EVENT(f2fs_bmap,
         | ^~~~~~~~~~~
>> include/trace/events/f2fs.h:1914:2: note: in expansion of macro 'TP_printk'
    1914 |  TP_printk("dev = (%d,%d), ino = %lu, lblock:%lld, pblock:%lld",
         |  ^~~~~~~~~
   In file included from include/trace/trace_events.h:402,
                    from include/trace/define_trace.h:102,
                    from include/trace/events/f2fs.h:1924,
                    from fs/f2fs/super.c:37:
   include/trace/events/f2fs.h:1914:36: note: format string is defined here
    1914 |  TP_printk("dev = (%d,%d), ino = %lu, lblock:%lld, pblock:%lld",
         |                                  ~~^
         |                                    |
         |                                    long unsigned int
         |                                  %u

vim +1914 include/trace/events/f2fs.h

  1895	
  1896		TP_PROTO(struct inode *inode, sector_t lblock, sector_t pblock),
  1897	
  1898		TP_ARGS(inode, lblock, pblock),
  1899	
  1900		TP_STRUCT__entry(
  1901			__field(dev_t, dev)
  1902			__field(ino_t, ino)
  1903			__field(sector_t, lblock)
  1904			__field(sector_t, pblock)
  1905		),
  1906	
  1907		TP_fast_assign(
  1908			__entry->dev		= inode->i_sb->s_dev;
  1909			__entry->ino		= inode->i_ino;
  1910			__entry->lblock		= lblock;
  1911			__entry->pblock		= pblock;
  1912		),
  1913	
> 1914		TP_printk("dev = (%d,%d), ino = %lu, lblock:%lld, pblock:%lld",
  1915			show_dev(__entry->dev),
  1916			__entry->ino,
  1917			(unsigned long long)__entry->lblock,
  1918			(unsigned long long)__entry->pblock)
  1919	);
  1920	

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