Messages in this thread | | | Date | Sat, 4 Jun 2022 16:15:26 +0800 | From | kernel test robot <> | Subject | [jcmvbkbc-xtensa:xtensa-5.18-esp32 42/45] drivers/tty/serial/esp32_uart.c:33:6: warning: no previous prototype for 'dbg_echo' |
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tree: https://github.com/jcmvbkbc/linux-xtensa xtensa-5.18-esp32 head: 137adeae90088411fe27a1be624afd8336542302 commit: 4475ad0ed7f7654f6cbc879814c0a2bad8274db4 [42/45] WIP: drivers/tty/serial: add driver for ESP32 UART config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20220604/202206041621.cmMY1siz-lkp@intel.com/config) compiler: powerpc-linux-gcc (GCC) 11.3.0 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 # https://github.com/jcmvbkbc/linux-xtensa/commit/4475ad0ed7f7654f6cbc879814c0a2bad8274db4 git remote add jcmvbkbc-xtensa https://github.com/jcmvbkbc/linux-xtensa git fetch --no-tags jcmvbkbc-xtensa xtensa-5.18-esp32 git checkout 4475ad0ed7f7654f6cbc879814c0a2bad8274db4 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/tty/serial/
If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> drivers/tty/serial/esp32_uart.c:33:6: warning: no previous prototype for 'dbg_echo' [-Wmissing-prototypes] 33 | void dbg_echo(const char *s) | ^~~~~~~~ >> drivers/tty/serial/esp32_uart.c:48:6: warning: no previous prototype for 'dbg_printf' [-Wmissing-prototypes] 48 | void dbg_printf(const char *fmt, ...) | ^~~~~~~~~~ drivers/tty/serial/esp32_uart.c: In function 'dbg_printf': >> drivers/tty/serial/esp32_uart.c:54:9: warning: function 'dbg_printf' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 54 | vsnprintf(buf, sizeof(buf), fmt, ap); | ^~~~~~~~~
vim +/dbg_echo +33 drivers/tty/serial/esp32_uart.c
32 > 33 void dbg_echo(const char *s) 34 { 35 volatile void __iomem *base = (volatile void __iomem *)0x3ff40000; 36 37 while ((readl(base + UART_STATUS_REG) & UART_TXFIFO_CNT_MASK) != 0) 38 ; 39 40 while (*s) { 41 if (*s == '\n') 42 writel('\r', base + UART_FIFO_REG); 43 writel(*s, base + UART_FIFO_REG); 44 ++s; 45 } 46 } 47 > 48 void dbg_printf(const char *fmt, ...) 49 { 50 va_list ap; 51 char buf[256]; 52 53 va_start(ap, fmt); > 54 vsnprintf(buf, sizeof(buf), fmt, ap); 55 va_end(ap); 56 dbg_echo(buf); 57 } 58
-- 0-DAY CI Kernel Test Service https://01.org/lkp
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