Hi Rodrigo, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linux/master] [also build test WARNING on robh/for-next linus/master v5.4 next-20191208] [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/Rodrigo-Rolim-Mendes-de-Alencar/video-fbdev-added-driver-for-sharp-memory-lcd-displays/20191207-112607 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 26bc672134241a080a83b2ab9aa8abede8d30e1c reproduce: # apt-get install sparse # sparse version: v0.6.1-91-g817270f-dirty make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> drivers/video/fbdev/smemlcdfb.c:71:29: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned char [usertype] *vmem @@ got signed char [usertype] *vmem @@ >> drivers/video/fbdev/smemlcdfb.c:71:29: sparse: expected unsigned char [usertype] *vmem >> drivers/video/fbdev/smemlcdfb.c:71:29: sparse: got char [noderef] <asn:2> *screen_base vim +71 drivers/video/fbdev/smemlcdfb.c 67 68 static void smemlcd_update(struct smemlcd_par *par) 69 { 70 struct spi_device *spi = par->spi; > 71 u8 *vmem = par->info->screen_base; 72 u8 *buf_ptr = par->spi_buf; 73 int ret; 74 u32 i,j; 75 76 if (par->start + par->height > par->info->var.yres) { 77 par->start = 0; 78 par->height = 0; 79 } 80 /* go to start line */ 81 vmem += par->start * par->vmem_width; 82 /* update vcom */ 83 par->vcom ^= SMEMLCD_FRAME_INVERSION; 84 /* mode selection */ 85 *(buf_ptr++) = (par->height)? (SMEMLCD_DATA_UPDATE | par->vcom) : par->vcom; 86 87 /* not all SPI masters have LSB-first mode, bitrev8 is used */ 88 for (i = par->start + 1; i < par->start + par->height + 1; i++) { 89 /* gate line address */ 90 *(buf_ptr++) = bitrev8(i); 91 /* data writing */ 92 for (j = 0; j < par->spi_width; j++) 93 *(buf_ptr++) = bitrev8(*(vmem++)); 94 /* dummy data */ 95 *(buf_ptr++) = SMEMLCD_DUMMY_DATA; 96 /* video memory alignment */ 97 for (; j < par->vmem_width; j++) 98 vmem++; 99 } 100 /* dummy data */ 101 *(buf_ptr++) = SMEMLCD_DUMMY_DATA; 102 103 ret = spi_write(spi, &(par->spi_buf[0]), par->height * (par->spi_width + 2) + 2); 104 if (ret < 0) 105 dev_err(&spi->dev, "Couldn't send SPI command.\n"); 106 107 par->start = U32_MAX; 108 par->height = 0; 109 } 110 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx Intel Corporation
