RTEMS | cpukit/dev/can/can-bittiming.c: Do not use abs() on unsigned values (!726)

Kinsey Moore (@opticron) gitlab at rtems.org
Thu Sep 18 22:59:20 UTC 2025




Kinsey Moore started a new discussion on cpukit/dev/can/can-bittiming.c: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/726#note_131231

 >      sample_point = 1000 * ( tseg + CAN_CALC_SYNC_SEG - tseg2 ) /
 >          ( tseg + CAN_CALC_SYNC_SEG );
 >  
 > -    sample_point_error = abs( sample_point_nominal - sample_point );
 > +    sample_point_error = sample_point_nominal - sample_point;

Wouldn't the better fix be to make the subtraction operands signed?

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/726#note_131231
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