Hi Mason,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on spi/for-next]
[also build test WARNING on v4.20-rc3 next-20181119]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Mason-Yang/spi-Add-Renesas-R-Car-RPC-SPI-controller-driver/20181120-020310
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
config: sh-allyesconfig (attached as .config)
compiler: sh4-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        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
        GCC_VERSION=7.2.0 make.cross ARCH=sh 

All warnings (new ones prefixed by >>):

   drivers//spi/spi-renesas-rpc.c:366:47: warning: 'struct spi_mem_dirmap_desc' declared inside parameter list will not be visible outside of this definition or declaration
    static ssize_t rpc_spi_mem_dirmap_read(struct spi_mem_dirmap_desc *desc,
                                                  ^~~~~~~~~~~~~~~~~~~
   In file included from drivers//spi/spi-renesas-rpc.c:18:0:
   drivers//spi/spi-renesas-rpc.c: In function 'rpc_spi_mem_dirmap_read':
   drivers//spi/spi-renesas-rpc.c:369:51: error: dereferencing pointer to incomplete type 'struct spi_mem_dirmap_desc'
     struct rpc_spi *rpc = spi_master_get_devdata(desc->mem->spi->master);
                                                      ^
   include/linux/spi/spi.h:1333:66: note: in definition of macro 'spi_master_get_devdata'
    #define spi_master_get_devdata(_ctlr) spi_controller_get_devdata(_ctlr)
                                                                     ^~~~~
   drivers//spi/spi-renesas-rpc.c: At top level:
   drivers//spi/spi-renesas-rpc.c:397:48: warning: 'struct spi_mem_dirmap_desc' declared inside parameter list will not be visible outside of this definition or declaration
    static ssize_t rpc_spi_mem_dirmap_write(struct spi_mem_dirmap_desc *desc,
                                                   ^~~~~~~~~~~~~~~~~~~
   In file included from drivers//spi/spi-renesas-rpc.c:18:0:
   drivers//spi/spi-renesas-rpc.c: In function 'rpc_spi_mem_dirmap_write':
   drivers//spi/spi-renesas-rpc.c:400:51: error: dereferencing pointer to incomplete type 'struct spi_mem_dirmap_desc'
     struct rpc_spi *rpc = spi_master_get_devdata(desc->mem->spi->master);
                                                      ^
   include/linux/spi/spi.h:1333:66: note: in definition of macro 'spi_master_get_devdata'
    #define spi_master_get_devdata(_ctlr) spi_controller_get_devdata(_ctlr)
                                                                     ^~~~~
   drivers//spi/spi-renesas-rpc.c: At top level:
   drivers//spi/spi-renesas-rpc.c:443:45: warning: 'struct spi_mem_dirmap_desc' declared inside parameter list will not be visible outside of this definition or declaration
    static int rpc_spi_mem_dirmap_create(struct spi_mem_dirmap_desc *desc)
                                                ^~~~~~~~~~~~~~~~~~~
   In file included from drivers//spi/spi-renesas-rpc.c:18:0:
   drivers//spi/spi-renesas-rpc.c: In function 'rpc_spi_mem_dirmap_create':
   drivers//spi/spi-renesas-rpc.c:445:51: error: dereferencing pointer to incomplete type 'struct spi_mem_dirmap_desc'
     struct rpc_spi *rpc = spi_master_get_devdata(desc->mem->spi->master);
                                                      ^
   include/linux/spi/spi.h:1333:66: note: in definition of macro 'spi_master_get_devdata'
    #define spi_master_get_devdata(_ctlr) spi_controller_get_devdata(_ctlr)
                                                                     ^~~~~
   drivers//spi/spi-renesas-rpc.c: At top level:
   drivers//spi/spi-renesas-rpc.c:484:3: error: 'const struct spi_controller_mem_ops' has no member named 'dirmap_create'
     .dirmap_create = rpc_spi_mem_dirmap_create,
      ^~~~~~~~~~~~~
   drivers//spi/spi-renesas-rpc.c:484:19: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .dirmap_create = rpc_spi_mem_dirmap_create,
                      ^~~~~~~~~~~~~~~~~~~~~~~~~
   drivers//spi/spi-renesas-rpc.c:484:19: note: (near initialization for 'rpc_spi_mem_ops.get_name')
   drivers//spi/spi-renesas-rpc.c:485:3: error: 'const struct spi_controller_mem_ops' has no member named 'dirmap_read'
     .dirmap_read = rpc_spi_mem_dirmap_read,
      ^~~~~~~~~~~
>> drivers//spi/spi-renesas-rpc.c:485:17: warning: excess elements in struct initializer
     .dirmap_read = rpc_spi_mem_dirmap_read,
                    ^~~~~~~~~~~~~~~~~~~~~~~
   drivers//spi/spi-renesas-rpc.c:485:17: note: (near initialization for 'rpc_spi_mem_ops')
   drivers//spi/spi-renesas-rpc.c:486:3: error: 'const struct spi_controller_mem_ops' has no member named 'dirmap_write'
     .dirmap_write = rpc_spi_mem_dirmap_write,
      ^~~~~~~~~~~~
   drivers//spi/spi-renesas-rpc.c:486:18: warning: excess elements in struct initializer
     .dirmap_write = rpc_spi_mem_dirmap_write,
                     ^~~~~~~~~~~~~~~~~~~~~~~~
   drivers//spi/spi-renesas-rpc.c:486:18: note: (near initialization for 'rpc_spi_mem_ops')
   cc1: some warnings being treated as errors

vim +485 drivers//spi/spi-renesas-rpc.c

   480	
   481	static const struct spi_controller_mem_ops rpc_spi_mem_ops = {
   482		.supports_op = rpc_spi_mem_supports_op,
   483		.exec_op = rpc_spi_mem_exec_op,
 > 484		.dirmap_create = rpc_spi_mem_dirmap_create,
 > 485		.dirmap_read = rpc_spi_mem_dirmap_read,
   486		.dirmap_write = rpc_spi_mem_dirmap_write,
   487	};
   488	

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