RTEMS | cpukit/confdefs: Add CAN stack resource calculation (!1097)

Tue Mar 3 20:04:21 UTC 2026

Michal Lenc commented: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1097#note_144190

Thanks for measuring how much stack the task really needs. I agree that adding `+0x1000` here is not needed.

I tested the change on Xilinx Zynq and CTU CAN FD and all seems to be working fine (`RTEMS_MINIMUM_STACK_SIZE` is defined to 4 kBs on Zynq). I think all (at least relevant) architectures have `RTEMS_MINIMUM_STACK_SIZE` defined to 4 kBs, though I am not sure if this is not configurable with some minimal build. But I expect there won't be builds with the default set below 512 bytes or even 1 Kb of stack.

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View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1097#note_144190
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