Re: [PATCH 8/9] can: calc_bittiming: add PWM calculation

[kernel test robot <lkp@intel.com>]

Hi Vincent,

kernel test robot noticed the following build warnings:

[auto build test WARNING on cb6649f6217c0331b885cf787f1d175963e2a1d2]

url:    https://github.com/intel-lab-lkp/linux/commits/Vincent-Mailhol/can-dev-can_dev_dropped_skb-drop-CAN-FD-skbs-if-FD-is-off/20251013-191232
base:   cb6649f6217c0331b885cf787f1d175963e2a1d2
patch link:    https://lore.kernel.org/r/20251013-canxl-netlink-v1-8-f422b7e2729f%40kernel.org
patch subject: [PATCH 8/9] can: calc_bittiming: add PWM calculation
config: riscv-randconfig-001-20251014 (https://download.01.org/0day-ci/archive/20251014/202510140553.qo3f0I9s-lkp@intel.com/config)
compiler: riscv64-linux-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251014/202510140553.qo3f0I9s-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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510140553.qo3f0I9s-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/linux/can/dev.h:18,
                    from net/can/raw.c:53:
   include/linux/can/bittiming.h: In function 'can_calc_pwm':
>> include/linux/can/bittiming.h:204:1: warning: no return statement in function returning non-void [-Wreturn-type]
     204 | }
         | ^

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for ARCH_HAS_ELF_CORE_EFLAGS
   Depends on [n]: BINFMT_ELF [=y] && ELF_CORE [=n]
   Selected by [y]:
   - RISCV [=y]


vim +204 include/linux/can/bittiming.h

   200	
   201	static inline int
   202	can_calc_pwm(struct net_device *dev, struct netlink_ext_ack *extack)
   203	{
 > 204	}
   205	#endif /* CONFIG_CAN_CALC_BITTIMING */
   206	

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