Hi Mateusz, Thank you for the patch! Yet something to improve: [auto build test ERROR on robh/for-next] [also build test ERROR on tty/tty-testing usb/usb-testing staging/staging-testing driver-core/driver-core-testing linus/master v5.7-rc7 next-20200526] [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/Mateusz-Holenko/LiteX-SoC-controller-and-LiteUART-serial-driver/20200528-003240 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next config: x86_64-allyesconfig (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 3393cc4cebf9969db94dc424b7a2b6195589c33b) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp@xxxxxxxxx> All error/warnings (new ones prefixed by >>, old ones prefixed by <<): >> drivers/tty/serial/liteuart.c:266:9: error: implicit declaration of function 'kzalloc' [-Werror,-Wimplicit-function-declaration] uart = kzalloc(sizeof(struct liteuart_port), GFP_KERNEL); ^ drivers/tty/serial/liteuart.c:266:9: note: did you mean 'vzalloc'? include/linux/vmalloc.h:106:14: note: 'vzalloc' declared here extern void *vzalloc(unsigned long size); ^ >> drivers/tty/serial/liteuart.c:266:7: warning: incompatible integer to pointer conversion assigning to 'struct liteuart_port *' from 'int' [-Wint-conversion] uart = kzalloc(sizeof(struct liteuart_port), GFP_KERNEL); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 warning and 1 error generated. vim +/kzalloc +266 drivers/tty/serial/liteuart.c 243 244 static int liteuart_probe(struct platform_device *pdev) 245 { 246 struct device_node *np = pdev->dev.of_node; 247 struct liteuart_port *uart; 248 struct uart_port *port; 249 struct xa_limit limit; 250 int dev_id, ret; 251 252 /* no device tree */ 253 if (!np) 254 return -ENODEV; 255 256 if (!litex_check_accessors()) 257 return -EPROBE_DEFER; 258 259 /* look for aliases; auto-enumerate for free index if not found */ 260 dev_id = of_alias_get_id(np, "serial"); 261 if (dev_id < 0) 262 limit = XA_LIMIT(0, CONFIG_SERIAL_LITEUART_MAX_PORTS); 263 else 264 limit = XA_LIMIT(dev_id, dev_id); 265 > 266 uart = kzalloc(sizeof(struct liteuart_port), GFP_KERNEL); 267 if (!uart) 268 return -ENOMEM; 269 270 ret = xa_alloc(&liteuart_array, &dev_id, uart, limit, GFP_KERNEL); 271 if (ret) 272 return ret; 273 274 port = &uart->port; 275 276 /* get membase */ 277 port->membase = devm_platform_get_and_ioremap_resource(pdev, 0, NULL); 278 if (!port->membase) 279 return -ENXIO; 280 281 /* values not from device tree */ 282 port->dev = &pdev->dev; 283 port->iotype = UPIO_MEM; 284 port->flags = UPF_BOOT_AUTOCONF; 285 port->ops = &liteuart_ops; 286 port->regshift = 2; 287 port->fifosize = 16; 288 port->iobase = 1; 289 port->type = PORT_UNKNOWN; 290 port->line = dev_id; 291 spin_lock_init(&port->lock); 292 293 return uart_add_one_port(&liteuart_driver, &uart->port); 294 } 295 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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