tree:
https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git devel
head: ab00d8ca266aab3b71f64266a2351dfce6baadfb
commit: 998695ea4c020601bfa37c3cb6559e48c420b286 [67/107] extract mxser_ioctl_op_mode
config: x86_64-randconfig-a006-20210318 (attached as .config)
compiler: clang version 13.0.0 (
https://github.com/llvm/llvm-project
fcc1ce00931751ac02498986feb37744e9ace8de)
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/jirislaby/linux.git/commi...
git remote add jirislaby
https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git
git fetch --no-tags jirislaby devel
git checkout 998695ea4c020601bfa37c3cb6559e48c420b286
# 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 <lkp(a)intel.com>
All warnings (new ones prefixed by >>):
> drivers/tty/mxser.c:1401:5: warning: no previous prototype for
function 'mxser_ioctl_op_mode' [-Wmissing-prototypes]
int
mxser_ioctl_op_mode(struct mxser_port *port, int index, bool set,
^
drivers/tty/mxser.c:1401:1: note: declare 'static' if the function is not
intended to be used outside of this translation unit
int mxser_ioctl_op_mode(struct mxser_port *port, int index, bool set,
^
static
1 warning generated.
vim +/mxser_ioctl_op_mode +1401 drivers/tty/mxser.c
1399
1400 /* We should likely switch to TIOCGRS485/TIOCSRS485. */
1401 int mxser_ioctl_op_mode(struct mxser_port *port, int index, bool
set,
1402 int __user *u_opmode)
1403 {
1404 static const unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1405 int opmode, p = index % 4;
1406 int shiftbit = p * 2;
1407 unsigned char val, mask;
1408
1409 if (port->board->chip_flag != MOXA_MUST_MU860_HWID)
1410 return -EFAULT;
1411
1412 if (set) {
1413 if (get_user(opmode, u_opmode))
1414 return -EFAULT;
1415
1416 if (opmode != RS232_MODE && opmode != RS485_2WIRE_MODE &&
1417 opmode != RS422_MODE &&
1418 opmode != RS485_4WIRE_MODE)
1419 return -EFAULT;
1420
1421 mask = ModeMask[p];
1422
1423 spin_lock_irq(&port->slock);
1424 val = inb(port->opmode_ioaddr);
1425 val &= mask;
1426 val |= (opmode << shiftbit);
1427 outb(val, port->opmode_ioaddr);
1428 spin_unlock_irq(&port->slock);
1429 } else {
1430 spin_lock_irq(&port->slock);
1431 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1432 spin_unlock_irq(&port->slock);
1433
1434 opmode &= OP_MODE_MASK;
1435 if (put_user(opmode, u_opmode))
1436 return -EFAULT;
1437 }
1438
1439 return 0;
1440 }
1441
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org