Hi Sudeep,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on next-20200529]
[cannot apply to linus/master v5.7 v5.7-rc7 v5.7-rc6 v5.7]
[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/Sudeep-Holla/firmware-Add-support-for-PSA-FF-A-interface/20200601-174706
base:    e7b08814b16b80a0bf76eeca16317f8c2ed23b8c
config: arm64-allyesconfig (attached as .config)
compiler: aarch64-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=arm64 

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

All warnings (new ones prefixed by >>, old ones prefixed by <<):

>> drivers/firmware/arm_psa_ffa/driver.c:106:1: warning: no previous prototype for '__arm_psa_ffa_fn_smc' [-Wmissing-prototypes]
106 | __arm_psa_ffa_fn_smc(unsigned long function_id,unsigned long arg0,
| ^~~~~~~~~~~~~~~~~~~~
>> drivers/firmware/arm_psa_ffa/driver.c:120:1: warning: no previous prototype for '__arm_psa_ffa_fn_hvc' [-Wmissing-prototypes]
120 | __arm_psa_ffa_fn_hvc(unsigned long function_id,unsigned long arg0,
| ^~~~~~~~~~~~~~~~~~~~

vim +/__arm_psa_ffa_fn_smc +106 drivers/firmware/arm_psa_ffa/driver.c

   104	
   105	struct arm_smccc_res
 > 106	__arm_psa_ffa_fn_smc(unsigned long function_id,unsigned long arg0,
   107			     unsigned long arg1, unsigned long arg2,
   108			     unsigned long arg3, unsigned long arg4,
   109			     unsigned long arg5, unsigned long arg6)
   110	{
   111		struct arm_smccc_res res;
   112	
   113		arm_smccc_smc(function_id, arg0, arg1, arg2, arg3, arg4, arg5, arg6,
   114			      &res);
   115	
   116		return res;
   117	}
   118	
   119	struct arm_smccc_res
 > 120	__arm_psa_ffa_fn_hvc(unsigned long function_id,unsigned long arg0,
   121			     unsigned long arg1, unsigned long arg2,
   122			     unsigned long arg3, unsigned long arg4,
   123			     unsigned long arg5, unsigned long arg6)
   124	{
   125		struct arm_smccc_res res;
   126	
   127		arm_smccc_hvc(function_id, arg0, arg1, arg2, arg3, arg4, arg5, arg6,
   128			      &res);
   129	
   130		return res;
   131	}
   132	

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