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charset=us-ascii Content-Disposition: inline tree: https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git devel head: ddc23bf3036b252a58a07fbcf74b3a0a6cb3582d commit: 555da4e8dcbc70496db3e4cf4c9e15ab0e1a2bd2 [53/90] serial_core: use GUARDs config: arm-randconfig-002-20250610 (https://download.01.org/0day-ci/archive/20250610/202506101035.cEBHA2Ng-lkp@intel.com/config) compiler: arm-linux-gnueabi-gcc (GCC) 8.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250610/202506101035.cEBHA2Ng-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202506101035.cEBHA2Ng-lkp@intel.com/ All warnings (new ones prefixed by >>): drivers/tty/serial/serial_core.c: In function 'uart_tiocmget': >> drivers/tty/serial/serial_core.c:1087:6: warning: unused variable 'result' [-Wunused-variable] int result; ^~~~~~ vim +/result +1087 drivers/tty/serial/serial_core.c ^1da177e4c3f41 drivers/serial/serial_core.c Linus Torvalds 2005-04-16 1081 60b33c133ca0b7 drivers/tty/serial/serial_core.c Alan Cox 2011-02-14 1082 static int uart_tiocmget(struct tty_struct *tty) ^1da177e4c3f41 drivers/serial/serial_core.c Linus Torvalds 2005-04-16 1083 { ^1da177e4c3f41 drivers/serial/serial_core.c Linus Torvalds 2005-04-16 1084 struct uart_state *state = tty->driver_data; a2bceae065ed8c drivers/serial/serial_core.c Alan Cox 2009-09-19 1085 struct tty_port *port = &state->port; 4047b37122d1be drivers/tty/serial/serial_core.c Peter Hurley 2016-04-09 1086 struct uart_port *uport; 5879adbff5aad0 drivers/tty/serial/serial_core.c Jiri Slaby (SUSE 2024-08-08 @1087) int result; 5879adbff5aad0 drivers/tty/serial/serial_core.c Jiri Slaby (SUSE 2024-08-08 1088) 5879adbff5aad0 drivers/tty/serial/serial_core.c Jiri Slaby (SUSE 2024-08-08 1089) guard(mutex)(&port->mutex); ^1da177e4c3f41 drivers/serial/serial_core.c Linus Torvalds 2005-04-16 1090 4047b37122d1be drivers/tty/serial/serial_core.c Peter Hurley 2016-04-09 1091 uport = uart_port_check(state); 5879adbff5aad0 drivers/tty/serial/serial_core.c Jiri Slaby (SUSE 2024-08-08 1092) if (!uport || tty_io_error(tty)) 5879adbff5aad0 drivers/tty/serial/serial_core.c Jiri Slaby (SUSE 2024-08-08 1093) return -EIO; 4047b37122d1be drivers/tty/serial/serial_core.c Peter Hurley 2016-04-09 1094 555da4e8dcbc70 drivers/tty/serial/serial_core.c Jiri Slaby (SUSE 2025-04-15 1095) guard(uart_port_lock_irq)(uport); 5879adbff5aad0 drivers/tty/serial/serial_core.c Jiri Slaby (SUSE 2024-08-08 1096) 555da4e8dcbc70 drivers/tty/serial/serial_core.c Jiri Slaby (SUSE 2025-04-15 1097) return uport->mctrl | uport->ops->get_mctrl(uport); ^1da177e4c3f41 drivers/serial/serial_core.c Linus Torvalds 2005-04-16 1098 } ^1da177e4c3f41 drivers/serial/serial_core.c Linus Torvalds 2005-04-16 1099 :::::: The code at line 1087 was first introduced by commit :::::: 5879adbff5aad0436298db006a922dd576339c7f serial: use guards for simple mutex locks :::::: TO: Jiri Slaby (SUSE) :::::: CC: Greg Kroah-Hartman -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki