tree: git://git.armlinux.org.uk/~rmk/linux-arm zii head: 2c17c82cf0078ead3d8a315b2b103f9e5a5cdb1d commit: c1b605b3b2edac51ad6b687c68f087fe166790ce [76/167] net: dsa: qca8k: convert to use phylink_pcs config: arc-randconfig-r043-20220118 (https://download.01.org/0day-ci/archive/20220118/202201181202.Fx7O6xnh-lk...) compiler: arceb-elf-gcc (GCC) 11.2.0 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 git remote add rmk-arm git://git.armlinux.org.uk/~rmk/linux-arm git fetch --no-tags rmk-arm zii git checkout c1b605b3b2edac51ad6b687c68f087fe166790ce # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash drivers/net/dsa/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/net/dsa/qca8k.c: In function 'qca8k_pcs_config': drivers/net/dsa/qca8k.c:1185:17: error: implicit declaration of function 'qca8k_mac_config_setup_internal_delay' [-Werror=implicit-function-declaration] 1185 | qca8k_mac_config_setup_internal_delay(priv, cpu_port_index, reg); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/dsa/qca8k.c: At top level: 1479 | qca8k_mac_config_setup_internal_delay(struct qca8k_priv *priv, int cpu_port_index, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/dsa/qca8k.c:1479:1: error: static declaration of 'qca8k_mac_config_setup_internal_delay' follows non-static declaration drivers/net/dsa/qca8k.c:1185:17: note: previous implicit declaration of 'qca8k_mac_config_setup_internal_delay' with type 'void(struct qca8k_priv *, int, u32)' {aka 'void(struct qca8k_priv *, int, unsigned int)'} 1185 | qca8k_mac_config_setup_internal_delay(priv, cpu_port_index, reg); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +1479 drivers/net/dsa/qca8k.c c1b605b3b2edac Russell King (Oracle 2021-11-23 1477) cef08115846e58 Ansuel Smith 2021-10-14 1478 static void cef08115846e58 Ansuel Smith 2021-10-14 @1479 qca8k_mac_config_setup_internal_delay(struct qca8k_priv *priv, int cpu_port_index, cef08115846e58 Ansuel Smith 2021-10-14 1480 u32 reg) cef08115846e58 Ansuel Smith 2021-10-14 1481 { cef08115846e58 Ansuel Smith 2021-10-14 1482 u32 delay, val = 0; cef08115846e58 Ansuel Smith 2021-10-14 1483 int ret; cef08115846e58 Ansuel Smith 2021-10-14 1484 cef08115846e58 Ansuel Smith 2021-10-14 1485 /* Delay can be declared in 3 different way. cef08115846e58 Ansuel Smith 2021-10-14 1486 * Mode to rgmii and internal-delay standard binding defined cef08115846e58 Ansuel Smith 2021-10-14 1487 * rgmii-id or rgmii-tx/rx phy mode set. cef08115846e58 Ansuel Smith 2021-10-14 1488 * The parse logic set a delay different than 0 only when one cef08115846e58 Ansuel Smith 2021-10-14 1489 * of the 3 different way is used. In all other case delay is cef08115846e58 Ansuel Smith 2021-10-14 1490 * not enabled. With ID or TX/RXID delay is enabled and set cef08115846e58 Ansuel Smith 2021-10-14 1491 * to the default and recommended value. cef08115846e58 Ansuel Smith 2021-10-14 1492 */ fd0bb28c547f7c Ansuel Smith 2021-10-14 1493 if (priv->ports_config.rgmii_tx_delay[cpu_port_index]) { fd0bb28c547f7c Ansuel Smith 2021-10-14 1494 delay = priv->ports_config.rgmii_tx_delay[cpu_port_index]; cef08115846e58 Ansuel Smith 2021-10-14 1495 cef08115846e58 Ansuel Smith 2021-10-14 1496 val |= QCA8K_PORT_PAD_RGMII_TX_DELAY(delay) | cef08115846e58 Ansuel Smith 2021-10-14 1497 QCA8K_PORT_PAD_RGMII_TX_DELAY_EN; cef08115846e58 Ansuel Smith 2021-10-14 1498 } cef08115846e58 Ansuel Smith 2021-10-14 1499 fd0bb28c547f7c Ansuel Smith 2021-10-14 1500 if (priv->ports_config.rgmii_rx_delay[cpu_port_index]) { fd0bb28c547f7c Ansuel Smith 2021-10-14 1501 delay = priv->ports_config.rgmii_rx_delay[cpu_port_index]; cef08115846e58 Ansuel Smith 2021-10-14 1502 cef08115846e58 Ansuel Smith 2021-10-14 1503 val |= QCA8K_PORT_PAD_RGMII_RX_DELAY(delay) | cef08115846e58 Ansuel Smith 2021-10-14 1504 QCA8K_PORT_PAD_RGMII_RX_DELAY_EN; cef08115846e58 Ansuel Smith 2021-10-14 1505 } cef08115846e58 Ansuel Smith 2021-10-14 1506 cef08115846e58 Ansuel Smith 2021-10-14 1507 /* Set RGMII delay based on the selected values */ cef08115846e58 Ansuel Smith 2021-10-14 1508 ret = qca8k_rmw(priv, reg, cef08115846e58 Ansuel Smith 2021-10-14 1509 QCA8K_PORT_PAD_RGMII_TX_DELAY_MASK | cef08115846e58 Ansuel Smith 2021-10-14 1510 QCA8K_PORT_PAD_RGMII_RX_DELAY_MASK | cef08115846e58 Ansuel Smith 2021-10-14 1511 QCA8K_PORT_PAD_RGMII_TX_DELAY_EN | cef08115846e58 Ansuel Smith 2021-10-14 1512 QCA8K_PORT_PAD_RGMII_RX_DELAY_EN, cef08115846e58 Ansuel Smith 2021-10-14 1513 val); cef08115846e58 Ansuel Smith 2021-10-14 1514 if (ret) cef08115846e58 Ansuel Smith 2021-10-14 1515 dev_err(priv->dev, "Failed to set internal delay for CPU port%d", cef08115846e58 Ansuel Smith 2021-10-14 1516 cpu_port_index == QCA8K_CPU_PORT0 ? 0 : 6); cef08115846e58 Ansuel Smith 2021-10-14 1517 } cef08115846e58 Ansuel Smith 2021-10-14 1518 :::::: The code at line 1479 was first introduced by commit :::::: cef08115846e581f80ff99abf7bf218da1840616 net: dsa: qca8k: set internal delay also for sgmii :::::: TO: Ansuel Smith <ansuelsmth(a)gmail.com&gt; :::::: CC: David S. Miller <davem(a)davemloft.net&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org