Re: [PATCH] serial: max310x: fix compile errors if CONFIG_SPI_MASTER is disabled
From: kernel test robot
Date: Fri May 15 2026 - 06:32:21 EST
Hi Hugo,
kernel test robot noticed the following build warnings:
[auto build test WARNING on 16e95bfb79b5d9d01dc7651d98caf3c2ace331cd]
url: https://github.com/intel-lab-lkp/linux/commits/Hugo-Villeneuve/serial-max310x-fix-compile-errors-if-CONFIG_SPI_MASTER-is-disabled/20260515-014130
base: 16e95bfb79b5d9d01dc7651d98caf3c2ace331cd
patch link: https://lore.kernel.org/r/20260512152749.1767622-1-hugo%40hugovil.com
patch subject: [PATCH] serial: max310x: fix compile errors if CONFIG_SPI_MASTER is disabled
config: alpha-randconfig-r063-20260515 (https://download.01.org/0day-ci/archive/20260515/202605151854.fLunCPPN-lkp@xxxxxxxxx/config)
compiler: alpha-linux-gcc (GCC) 14.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260515/202605151854.fLunCPPN-lkp@xxxxxxxxx/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 <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605151854.fLunCPPN-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
drivers/tty/serial/max310x.c:1510:20: warning: 'max310x_regmap_name' defined but not used [-Wunused-function]
1510 | static const char *max310x_regmap_name(u8 port_id)
| ^~~~~~~~~~~~~~~~~~~
drivers/tty/serial/max310x.c:1482:13: warning: 'max310x_remove' defined but not used [-Wunused-function]
1482 | static void max310x_remove(struct device *dev)
| ^~~~~~~~~~~~~~
drivers/tty/serial/max310x.c:1298:12: warning: 'max310x_probe' defined but not used [-Wunused-function]
1298 | static int max310x_probe(struct device *dev, const struct max310x_devtype *devtype,
| ^~~~~~~~~~~~~
>> drivers/tty/serial/max310x.c:515:13: warning: 'max310x_reg_noinc' defined but not used [-Wunused-function]
515 | static bool max310x_reg_noinc(struct device *dev, unsigned int reg)
| ^~~~~~~~~~~~~~~~~
>> drivers/tty/serial/max310x.c:502:13: warning: 'max310x_reg_precious' defined but not used [-Wunused-function]
502 | static bool max310x_reg_precious(struct device *dev, unsigned int reg)
| ^~~~~~~~~~~~~~~~~~~~
>> drivers/tty/serial/max310x.c:482:13: warning: 'max310x_reg_volatile' defined but not used [-Wunused-function]
482 | static bool max310x_reg_volatile(struct device *dev, unsigned int reg)
| ^~~~~~~~~~~~~~~~~~~~
>> drivers/tty/serial/max310x.c:467:13: warning: 'max310x_reg_writeable' defined but not used [-Wunused-function]
467 | static bool max310x_reg_writeable(struct device *dev, unsigned int reg)
| ^~~~~~~~~~~~~~~~~~~~~
vim +/max310x_reg_noinc +515 drivers/tty/serial/max310x.c
003236d9ac4d027 Alexander Shiyan 2013-06-29 466
10d8b34a421716d Alexander Shiyan 2013-06-29 @467 static bool max310x_reg_writeable(struct device *dev, unsigned int reg)
f65444187a66bf5 Alexander Shiyan 2012-08-06 468 {
6ef281daf020592 Cosmin Tanislav 2022-06-05 469 switch (reg) {
f65444187a66bf5 Alexander Shiyan 2012-08-06 470 case MAX310X_IRQSTS_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 471 case MAX310X_LSR_IRQSTS_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 472 case MAX310X_SPCHR_IRQSTS_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 473 case MAX310X_STS_IRQSTS_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 474 case MAX310X_TXFIFOLVL_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 475 case MAX310X_RXFIFOLVL_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 476 return false;
f65444187a66bf5 Alexander Shiyan 2012-08-06 477 default:
f65444187a66bf5 Alexander Shiyan 2012-08-06 478 return true;
f65444187a66bf5 Alexander Shiyan 2012-08-06 479 }
d5dd265cda8083c Hugo Villeneuve 2024-01-18 480 }
f65444187a66bf5 Alexander Shiyan 2012-08-06 481
f65444187a66bf5 Alexander Shiyan 2012-08-06 @482 static bool max310x_reg_volatile(struct device *dev, unsigned int reg)
f65444187a66bf5 Alexander Shiyan 2012-08-06 483 {
6ef281daf020592 Cosmin Tanislav 2022-06-05 484 switch (reg) {
f65444187a66bf5 Alexander Shiyan 2012-08-06 485 case MAX310X_RHR_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 486 case MAX310X_IRQSTS_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 487 case MAX310X_LSR_IRQSTS_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 488 case MAX310X_SPCHR_IRQSTS_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 489 case MAX310X_STS_IRQSTS_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 490 case MAX310X_TXFIFOLVL_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 491 case MAX310X_RXFIFOLVL_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 492 case MAX310X_GPIODATA_REG:
10d8b34a421716d Alexander Shiyan 2013-06-29 493 case MAX310X_BRGDIVLSB_REG:
10d8b34a421716d Alexander Shiyan 2013-06-29 494 case MAX310X_REG_05:
10d8b34a421716d Alexander Shiyan 2013-06-29 495 case MAX310X_REG_1F:
f65444187a66bf5 Alexander Shiyan 2012-08-06 496 return true;
f65444187a66bf5 Alexander Shiyan 2012-08-06 497 default:
f65444187a66bf5 Alexander Shiyan 2012-08-06 498 return false;
f65444187a66bf5 Alexander Shiyan 2012-08-06 499 }
d5dd265cda8083c Hugo Villeneuve 2024-01-18 500 }
f65444187a66bf5 Alexander Shiyan 2012-08-06 501
f65444187a66bf5 Alexander Shiyan 2012-08-06 @502 static bool max310x_reg_precious(struct device *dev, unsigned int reg)
f65444187a66bf5 Alexander Shiyan 2012-08-06 503 {
6ef281daf020592 Cosmin Tanislav 2022-06-05 504 switch (reg) {
f65444187a66bf5 Alexander Shiyan 2012-08-06 505 case MAX310X_RHR_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 506 case MAX310X_IRQSTS_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 507 case MAX310X_SPCHR_IRQSTS_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 508 case MAX310X_STS_IRQSTS_REG:
f65444187a66bf5 Alexander Shiyan 2012-08-06 509 return true;
f65444187a66bf5 Alexander Shiyan 2012-08-06 510 default:
f65444187a66bf5 Alexander Shiyan 2012-08-06 511 return false;
f65444187a66bf5 Alexander Shiyan 2012-08-06 512 }
d5dd265cda8083c Hugo Villeneuve 2024-01-18 513 }
f65444187a66bf5 Alexander Shiyan 2012-08-06 514
3f42b142ea11719 Jan Kundrát 2023-04-05 @515 static bool max310x_reg_noinc(struct device *dev, unsigned int reg)
3f42b142ea11719 Jan Kundrát 2023-04-05 516 {
3f42b142ea11719 Jan Kundrát 2023-04-05 517 return reg == MAX310X_RHR_REG;
3f42b142ea11719 Jan Kundrát 2023-04-05 518 }
3f42b142ea11719 Jan Kundrát 2023-04-05 519
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki