Hi K,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on staging/staging-testing]
[also build test WARNING on v5.8-rc2 next-20200626]
[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/B-K-Karthik/fbtft-bus-c-Removing-that-prohibited-space-before/20200627-125315
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git 
92cd1b5d65f5c67147c7da39a3c2ad7e6ff81027
config: ia64-randconfig-s031-20200624 (attached as .config)
compiler: ia64-linux-gcc (GCC) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.2-dirty
        # save the attached .config to linux build tree
        make W=1 C=1 ARCH=ia64 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

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


sparse warnings: (new ones prefixed by >>)

>> drivers/staging/fbtft/fbtft-bus.c:65:1: sparse: sparse: macro 
>> "define_fbtft_write_reg" requires 4 arguments, but only 3 given
   drivers/staging/fbtft/fbtft-bus.c:67:1: sparse: sparse: macro 
"define_fbtft_write_reg" requires 4 arguments, but only 3 given
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at end of 
declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got void
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ) in 
function declarator
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got (
>> drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Trying to use 
>> reserved word 'if' as identifier
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ) in 
function declarator
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got =
>> drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Trying to use 
>> reserved word 'for' as identifier
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at end of 
declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got <
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at end of 
declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got ++
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at end of 
declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got +=
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at the 
end of type declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got }
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at end of 
declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got +=
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at the 
end of type declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got }
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at end of 
declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got +=
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at the 
end of type declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got }
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at end of 
declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got +=
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at the 
end of type declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got }
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at the 
end of type declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got }
>> drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Trying to use 
>> reserved word 'do' as identifier
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at end of 
declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got {
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at the 
end of type declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got }
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at the 
end of type declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got }
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ) in 
function declarator
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got ->
>> drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Trying to use 
>> reserved word 'if' as identifier
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at the 
end of type declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got }
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at end of 
declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got +=
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at the 
end of type declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got }
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at end of 
declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got +=
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at the 
end of type declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got }
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at end of 
declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got +=
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at the 
end of type declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got }
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at end of 
declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got +=
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at the 
end of type declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got }
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ) in 
function declarator
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got <
>> drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Trying to use 
>> reserved word 'if' as identifier
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at end of 
declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got --
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ) in 
function declarator
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got ->
>> drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Trying to use 
>> reserved word 'if' as identifier
>> drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Trying to use 
>> reserved word 'if' as identifier
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at end of 
declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got :
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: Expected ; at the 
end of type declaration
   drivers/staging/fbtft/fbtft-bus.c:66:1: sparse: sparse: got }
   drivers/staging/fbtft/fbtft-bus.c:69:1: sparse: sparse: Expected ; at end of 
declaration
   drivers/staging/fbtft/fbtft-bus.c:69:1: sparse: sparse: got void
   drivers/staging/fbtft/fbtft-bus.c:76:13: sparse: sparse: Expected ) in 
function declarator
   drivers/staging/fbtft/fbtft-bus.c:76:13: sparse: sparse: got (
   drivers/staging/fbtft/fbtft-bus.c:76:9: sparse: sparse: Trying to use 
reserved word 'if' as identifier
   drivers/staging/fbtft/fbtft-bus.c:78:24: sparse: sparse: Expected ) in 
function declarator
   drivers/staging/fbtft/fbtft-bus.c:78:24: sparse: sparse: got =
   drivers/staging/fbtft/fbtft-bus.c:78:17: sparse: sparse: Trying to use 
reserved word 'for' as identifier
   drivers/staging/fbtft/fbtft-bus.c:78:31: sparse: sparse: Expected ; at end 
of declaration
   drivers/staging/fbtft/fbtft-bus.c:78:31: sparse: sparse: got <
   drivers/staging/fbtft/fbtft-bus.c:78:39: sparse: sparse: Expected ; at end 
of declaration
   drivers/staging/fbtft/fbtft-bus.c:78:39: sparse: sparse: got ++
   drivers/staging/fbtft/fbtft-bus.c:79:50: sparse: sparse: Expected ; at end 
of declaration
   drivers/staging/fbtft/fbtft-bus.c:79:50: sparse: sparse: got +=
   drivers/staging/fbtft/fbtft-bus.c:79:50: sparse: sparse: Expected ; at the 
end of type declaration
   drivers/staging/fbtft/fbtft-bus.c:79:50: sparse: sparse: got }
   drivers/staging/fbtft/fbtft-bus.c:81:17: sparse: sparse: Trying to use 
reserved word 'do' as identifier
   drivers/staging/fbtft/fbtft-bus.c:81:17: sparse: sparse: Expected ; at end 
of declaration
   drivers/staging/fbtft/fbtft-bus.c:81:17: sparse: sparse: got {
   drivers/staging/fbtft/fbtft-bus.c:81:17: sparse: sparse: Expected ; at the 
end of type declaration
   drivers/staging/fbtft/fbtft-bus.c:81:17: sparse: sparse: got }
   drivers/staging/fbtft/fbtft-bus.c:84:9: sparse: sparse: Expected ; at the 
end of type declaration
   drivers/staging/fbtft/fbtft-bus.c:84:9: sparse: sparse: got }
   drivers/staging/fbtft/fbtft-bus.c:88:16: sparse: sparse: Expected ) in 
function declarator
   drivers/staging/fbtft/fbtft-bus.c:88:16: sparse: sparse: got ->
   drivers/staging/fbtft/fbtft-bus.c:88:9: sparse: sparse: Trying to use 
reserved word 'if' as identifier
   drivers/staging/fbtft/fbtft-bus.c:93:24: sparse: sparse: Expected ) in 
function declarator
   drivers/staging/fbtft/fbtft-bus.c:93:24: sparse: sparse: got =
>> drivers/staging/fbtft/fbtft-bus.c:93:17: sparse: sparse: too many errors

# 
https://github.com/0day-ci/linux/commit/f9a954fc5ae43b8fb5195dbb7152976581d80a1a
git remote add linux-review https://github.com/0day-ci/linux
git remote update linux-review
git checkout f9a954fc5ae43b8fb5195dbb7152976581d80a1a
vim +/define_fbtft_write_reg +65 drivers/staging/fbtft/fbtft-bus.c

c296d5f9957c03 Thomas Petazzoni   2014-12-31   64  
f9a954fc5ae43b B K Karthik        2020-06-27  @65  
define_fbtft_write_reg(fbtft_write_reg8_bus8, u8, u8)
8d8825b420ffb3 Alfonso Lima Astor 2017-10-17  @66  
define_fbtft_write_reg(fbtft_write_reg16_bus8, __be16, u16, cpu_to_be16)
f9a954fc5ae43b B K Karthik        2020-06-27   67  
define_fbtft_write_reg(fbtft_write_reg16_bus16, u16, u16)
c296d5f9957c03 Thomas Petazzoni   2014-12-31   68  
c296d5f9957c03 Thomas Petazzoni   2014-12-31   69  void 
fbtft_write_reg8_bus9(struct fbtft_par *par, int len, ...)
c296d5f9957c03 Thomas Petazzoni   2014-12-31   70  {
c296d5f9957c03 Thomas Petazzoni   2014-12-31   71       va_list args;
c296d5f9957c03 Thomas Petazzoni   2014-12-31   72       int i, ret;
c296d5f9957c03 Thomas Petazzoni   2014-12-31   73       int pad = 0;
c296d5f9957c03 Thomas Petazzoni   2014-12-31   74       u16 *buf = (u16 
*)par->buf;
c296d5f9957c03 Thomas Petazzoni   2014-12-31   75  
c296d5f9957c03 Thomas Petazzoni   2014-12-31   76       if (unlikely(par->debug 
& DEBUG_WRITE_REGISTER)) {
c296d5f9957c03 Thomas Petazzoni   2014-12-31   77               va_start(args, 
len);
c296d5f9957c03 Thomas Petazzoni   2014-12-31   78               for (i = 0; i < 
len; i++)
c296d5f9957c03 Thomas Petazzoni   2014-12-31   79                       *(((u8 
*)buf) + i) = (u8)va_arg(args, unsigned int);
c296d5f9957c03 Thomas Petazzoni   2014-12-31   80               va_end(args);
c296d5f9957c03 Thomas Petazzoni   2014-12-31  @81               
fbtft_par_dbg_hex(DEBUG_WRITE_REGISTER, par,
333c7b940526be Leonardo Brás      2018-08-07   82                               
  par->info->device, u8, buf, len, "%s: ",
333c7b940526be Leonardo Brás      2018-08-07   83                               
  __func__);
c296d5f9957c03 Thomas Petazzoni   2014-12-31   84       }
c296d5f9957c03 Thomas Petazzoni   2014-12-31   85       if (len <= 0)
c296d5f9957c03 Thomas Petazzoni   2014-12-31   86               return;
c296d5f9957c03 Thomas Petazzoni   2014-12-31   87  
c296d5f9957c03 Thomas Petazzoni   2014-12-31   88       if (par->spi && 
(par->spi->bits_per_word == 8)) {
c296d5f9957c03 Thomas Petazzoni   2014-12-31   89               /* we're 
emulating 9-bit, pad start of buffer with no-ops
b2ac4a927034d0 Anson Jacob        2016-08-25   90                * (assuming 
here that zero is a no-op)
b2ac4a927034d0 Anson Jacob        2016-08-25   91                */
c296d5f9957c03 Thomas Petazzoni   2014-12-31   92               pad = (len % 4) 
? 4 - (len % 4) : 0;
c296d5f9957c03 Thomas Petazzoni   2014-12-31  @93               for (i = 0; i < 
pad; i++)
c296d5f9957c03 Thomas Petazzoni   2014-12-31   94                       *buf++ 
= 0x000;
c296d5f9957c03 Thomas Petazzoni   2014-12-31   95       }
c296d5f9957c03 Thomas Petazzoni   2014-12-31   96  
c296d5f9957c03 Thomas Petazzoni   2014-12-31   97       va_start(args, len);
c296d5f9957c03 Thomas Petazzoni   2014-12-31   98       *buf++ = 
(u8)va_arg(args, unsigned int);
c296d5f9957c03 Thomas Petazzoni   2014-12-31   99       i = len - 1;
c296d5f9957c03 Thomas Petazzoni   2014-12-31  100       while (i--) {
c296d5f9957c03 Thomas Petazzoni   2014-12-31  101               *buf = 
(u8)va_arg(args, unsigned int);
c296d5f9957c03 Thomas Petazzoni   2014-12-31  102               *buf++ |= 
0x100; /* dc=1 */
c296d5f9957c03 Thomas Petazzoni   2014-12-31  103       }
c296d5f9957c03 Thomas Petazzoni   2014-12-31  104       va_end(args);
c296d5f9957c03 Thomas Petazzoni   2014-12-31  105       ret = 
par->fbtftops.write(par, par->buf, (len + pad) * sizeof(u16));
c296d5f9957c03 Thomas Petazzoni   2014-12-31  106       if (ret < 0) {
c296d5f9957c03 Thomas Petazzoni   2014-12-31  107               
dev_err(par->info->device,
aed1c72e447f0a Haneen Mohammed    2015-03-06  108                       
"write() failed and returned %d\n", ret);
c296d5f9957c03 Thomas Petazzoni   2014-12-31  109               return;
c296d5f9957c03 Thomas Petazzoni   2014-12-31  110       }
c296d5f9957c03 Thomas Petazzoni   2014-12-31  111  }
c296d5f9957c03 Thomas Petazzoni   2014-12-31  112  
EXPORT_SYMBOL(fbtft_write_reg8_bus9);
c296d5f9957c03 Thomas Petazzoni   2014-12-31  113  

---
0-DAY CI Kernel Test Service, Intel Corporation
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