tree: https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git kbuild head: 94c7dfd01652880ffa336baad8269ee9add8fb01 commit: 312d61883cf16e7b422caab857035f23a8c68076 [2/4] kernel hacking: add a config option to disable compiler auto-inlining 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 git checkout 312d61883cf16e7b422caab857035f23a8c68076 # save the attached .config to linux build tree GCC_VERSION=7.2.0 make.cross ARCH=sh Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers/tty/serial/qcom_geni_serial.c: In function 'qcom_geni_serial_probe': >> drivers/tty/serial/qcom_geni_serial.c:1313:22: warning: 'drv' may be used uninitialized in this function [-Wmaybe-uninitialized] uport->private_data = drv; ~~~~~~~~~~~~~~~~~~~~^~~~~ -- drivers/net/wireless/ath/ath10k/mac.c: In function 'ath10k_mac_init_rd': >> drivers/net/wireless/ath/ath10k/mac.c:8374:39: warning: 'rd' may be used uninitialized in this function [-Wmaybe-uninitialized] ar->ath_common.regulatory.current_rd = rd; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ In file included from arch/sh/include/asm/string.h:3:0, from include/linux/string.h:20, from include/linux/bitmap.h:9, from include/linux/cpumask.h:12, from include/linux/rcupdate.h:44, from include/linux/rbtree.h:34, from include/linux/skbuff.h:22, from include/linux/if_ether.h:23, from include/net/mac80211.h:21, from drivers/net/wireless/ath/ath10k/mac.h:21, from drivers/net/wireless/ath/ath10k/mac.c:19: drivers/net/wireless/ath/ath10k/mac.c: In function 'ath10k_bss_info_changed': arch/sh/include/asm/string_32.h:50:42: warning: array subscript is above array bounds [-Warray-bounds] : "0" (__dest), "1" (__src), "r" (__src+__n) ~~~~~^~~~ -- drivers/dma/stm32-mdma.c: In function 'stm32_mdma_setup_xfer': >> drivers/dma/stm32-mdma.c:781:6: warning: 'ccr' may be used uninitialized in this function [-Wmaybe-uninitialized] ccr &= ~STM32_MDMA_CCR_IRQ_MASK; ^~ vim +/drv +1313 drivers/tty/serial/qcom_geni_serial.c c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1251 c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1252 static int qcom_geni_serial_probe(struct platform_device *pdev) c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1253 { c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1254 int ret = 0; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1255 int line = -1; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1256 struct qcom_geni_serial_port *port; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1257 struct uart_port *uport; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1258 struct resource *res; 066cd1c4e Karthikeyan Ramasubramanian 2018-04-06 1259 int irq; 8a8a66a1a Girish Mahadevan 2018-07-13 1260 bool console = false; 8a8a66a1a Girish Mahadevan 2018-07-13 1261 struct uart_driver *drv; 8a8a66a1a Girish Mahadevan 2018-07-13 1262 8a8a66a1a Girish Mahadevan 2018-07-13 1263 if (of_device_is_compatible(pdev->dev.of_node, "qcom,geni-debug-uart")) 8a8a66a1a Girish Mahadevan 2018-07-13 1264 console = true; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1265 8a8a66a1a Girish Mahadevan 2018-07-13 1266 if (pdev->dev.of_node) { 8a8a66a1a Girish Mahadevan 2018-07-13 1267 if (console) { 8a8a66a1a Girish Mahadevan 2018-07-13 1268 drv = &qcom_geni_console_driver; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1269 line = of_alias_get_id(pdev->dev.of_node, "serial"); 8a8a66a1a Girish Mahadevan 2018-07-13 1270 } else { 8a8a66a1a Girish Mahadevan 2018-07-13 1271 drv = &qcom_geni_uart_driver; 8a8a66a1a Girish Mahadevan 2018-07-13 1272 line = of_alias_get_id(pdev->dev.of_node, "hsuart"); 8a8a66a1a Girish Mahadevan 2018-07-13 1273 } 8a8a66a1a Girish Mahadevan 2018-07-13 1274 } c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1275 8a8a66a1a Girish Mahadevan 2018-07-13 1276 port = get_port_from_line(line, console); c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1277 if (IS_ERR(port)) { 6a10635e9 Karthikeyan Ramasubramanian 2018-05-03 1278 dev_err(&pdev->dev, "Invalid line %d\n", line); 6a10635e9 Karthikeyan Ramasubramanian 2018-05-03 1279 return PTR_ERR(port); c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1280 } c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1281 c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1282 uport = &port->uport; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1283 /* Don't allow 2 drivers to access the same port */ c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1284 if (uport->private_data) c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1285 return -ENODEV; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1286 c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1287 uport->dev = &pdev->dev; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1288 port->se.dev = &pdev->dev; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1289 port->se.wrapper = dev_get_drvdata(pdev->dev.parent); c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1290 port->se.clk = devm_clk_get(&pdev->dev, "se"); c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1291 if (IS_ERR(port->se.clk)) { c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1292 ret = PTR_ERR(port->se.clk); c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1293 dev_err(&pdev->dev, "Err getting SE Core clk %d\n", ret); c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1294 return ret; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1295 } c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1296 c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1297 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 7693b331d Wei Yongjun 2018-03-22 1298 if (!res) 7693b331d Wei Yongjun 2018-03-22 1299 return -EINVAL; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1300 uport->mapbase = res->start; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1301 c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1302 port->tx_fifo_depth = DEF_FIFO_DEPTH_WORDS; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1303 port->rx_fifo_depth = DEF_FIFO_DEPTH_WORDS; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1304 port->tx_fifo_width = DEF_FIFO_WIDTH_BITS; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1305 066cd1c4e Karthikeyan Ramasubramanian 2018-04-06 1306 irq = platform_get_irq(pdev, 0); 066cd1c4e Karthikeyan Ramasubramanian 2018-04-06 1307 if (irq < 0) { 066cd1c4e Karthikeyan Ramasubramanian 2018-04-06 1308 dev_err(&pdev->dev, "Failed to get IRQ %d\n", irq); 066cd1c4e Karthikeyan Ramasubramanian 2018-04-06 1309 return irq; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1310 } 066cd1c4e Karthikeyan Ramasubramanian 2018-04-06 1311 uport->irq = irq; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1312 8a8a66a1a Girish Mahadevan 2018-07-13 @1313 uport->private_data = drv; c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1314 platform_set_drvdata(pdev, port); 8a8a66a1a Girish Mahadevan 2018-07-13 1315 port->handle_rx = console ? handle_rx_console : handle_rx_uart; 8a8a66a1a Girish Mahadevan 2018-07-13 1316 if (!console) 8a8a66a1a Girish Mahadevan 2018-07-13 1317 device_create_file(uport->dev, &dev_attr_loopback); 8a8a66a1a Girish Mahadevan 2018-07-13 1318 return uart_add_one_port(drv, uport); c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1319 } c4f528795 Karthikeyan Ramasubramanian 2018-03-14 1320 :::::: The code at line 1313 was first introduced by commit :::::: 8a8a66a1a18a1dbd213bee460bcedb1361abc7ff tty: serial: qcom_geni_serial: Add support for flow control :::::: TO: Girish Mahadevan <girishm@xxxxxxxxxxxxxx> :::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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