tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git tty-test head: 8a67b4c2f3f14e73a8ddfbef9c032d9f2fa6979a commit: 8a67b4c2f3f14e73a8ddfbef9c032d9f2fa6979a [13/13] tty: clean include/linux/tty.h up config: x86_64-randconfig-r013-20210408 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 56ea2e2fdd691136d5e6631fa0e447173694b82c) 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 # https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git/commit/?id=8a67b4c2f3f14e73a8ddfbef9c032d9f2fa6979a git remote add driver-core https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git git fetch --no-tags driver-core tty-test git checkout 8a67b4c2f3f14e73a8ddfbef9c032d9f2fa6979a # 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: kernel test robot <l...@intel.com>
All warnings (new ones prefixed by >>):
>> drivers/tty/tty_baudrate.c:92:9: warning: no previous prototype for function
>> 'tty_termios_input_baud_rate' [-Wmissing-prototypes]
speed_t tty_termios_input_baud_rate(struct ktermios *termios)
^
drivers/tty/tty_baudrate.c:92:1: note: declare 'static' if the function is
not intended to be used outside of this translation unit
speed_t tty_termios_input_baud_rate(struct ktermios *termios)
^
static
1 warning generated.
vim +/tty_termios_input_baud_rate +92 drivers/tty/tty_baudrate.c
fff0a2ca3a061c Nicolas Pitre 2017-04-12 79
fff0a2ca3a061c Nicolas Pitre 2017-04-12 80 /**
fff0a2ca3a061c Nicolas Pitre 2017-04-12 81 *
tty_termios_input_baud_rate
fff0a2ca3a061c Nicolas Pitre 2017-04-12 82 * @termios: termios
structure
fff0a2ca3a061c Nicolas Pitre 2017-04-12 83 *
fff0a2ca3a061c Nicolas Pitre 2017-04-12 84 * Convert termios baud
rate data into a speed. This should be called
fff0a2ca3a061c Nicolas Pitre 2017-04-12 85 * with the termios lock
held if this termios is a terminal termios
fff0a2ca3a061c Nicolas Pitre 2017-04-12 86 * structure. May change
the termios data. Device drivers can call this
fff0a2ca3a061c Nicolas Pitre 2017-04-12 87 * function but should use
->c_[io]speed directly as they are updated.
fff0a2ca3a061c Nicolas Pitre 2017-04-12 88 *
fff0a2ca3a061c Nicolas Pitre 2017-04-12 89 * Locking: none
fff0a2ca3a061c Nicolas Pitre 2017-04-12 90 */
fff0a2ca3a061c Nicolas Pitre 2017-04-12 91
fff0a2ca3a061c Nicolas Pitre 2017-04-12 @92 speed_t
tty_termios_input_baud_rate(struct ktermios *termios)
fff0a2ca3a061c Nicolas Pitre 2017-04-12 93 {
fff0a2ca3a061c Nicolas Pitre 2017-04-12 94 #ifdef IBSHIFT
fff0a2ca3a061c Nicolas Pitre 2017-04-12 95 unsigned int cbaud =
(termios->c_cflag >> IBSHIFT) & CBAUD;
fff0a2ca3a061c Nicolas Pitre 2017-04-12 96
fff0a2ca3a061c Nicolas Pitre 2017-04-12 97 if (cbaud == B0)
fff0a2ca3a061c Nicolas Pitre 2017-04-12 98 return
tty_termios_baud_rate(termios);
fefe287e4bf6ee Johan Hovold 2018-07-15 99 #ifdef BOTHER
fff0a2ca3a061c Nicolas Pitre 2017-04-12 100 /* Magic token for arbitrary
speed via c_ispeed*/
fff0a2ca3a061c Nicolas Pitre 2017-04-12 101 if (cbaud == BOTHER)
fff0a2ca3a061c Nicolas Pitre 2017-04-12 102 return
termios->c_ispeed;
fefe287e4bf6ee Johan Hovold 2018-07-15 103 #endif
fff0a2ca3a061c Nicolas Pitre 2017-04-12 104 if (cbaud & CBAUDEX) {
fff0a2ca3a061c Nicolas Pitre 2017-04-12 105 cbaud &= ~CBAUDEX;
fff0a2ca3a061c Nicolas Pitre 2017-04-12 106
fff0a2ca3a061c Nicolas Pitre 2017-04-12 107 if (cbaud < 1 || cbaud
+ 15 > n_baud_table)
fff0a2ca3a061c Nicolas Pitre 2017-04-12 108
termios->c_cflag &= ~(CBAUDEX << IBSHIFT);
fff0a2ca3a061c Nicolas Pitre 2017-04-12 109 else
fff0a2ca3a061c Nicolas Pitre 2017-04-12 110 cbaud += 15;
fff0a2ca3a061c Nicolas Pitre 2017-04-12 111 }
991a2519409700 H. Peter Anvin 2018-10-22 112 return cbaud >= n_baud_table ?
0 : baud_table[cbaud];
fefe287e4bf6ee Johan Hovold 2018-07-15 113 #else /* IBSHIFT */
fff0a2ca3a061c Nicolas Pitre 2017-04-12 114 return
tty_termios_baud_rate(termios);
fefe287e4bf6ee Johan Hovold 2018-07-15 115 #endif /* IBSHIFT */
fff0a2ca3a061c Nicolas Pitre 2017-04-12 116 }
fff0a2ca3a061c Nicolas Pitre 2017-04-12 117
EXPORT_SYMBOL(tty_termios_input_baud_rate);
fff0a2ca3a061c Nicolas Pitre 2017-04-12 118
:::::: The code at line 92 was first introduced by commit
:::::: fff0a2ca3a061c230b0e905e7586267a517538ac tty: move baudrate handling
code to a file of its own
:::::: TO: Nicolas Pitre <nicolas.pi...@linaro.org>
:::::: CC: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
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