RTEMS | posix/mmap: Fix validation order for map_fixed addresses (!542)

Fri Jul 11 06:20:49 UTC 2025

shuhua hua commented on a discussion: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/542#note_126334

Thanks for the technical clarification—I completely agree both orderings are standards-compliant given the checks don't dereference the pointer. For this implementation, I've intentionally maintained the NULL check first at line 144 as it streamlines readability by handling fundamental validity upfront before progressing to semantic alignment checks at line 148. This flow naturally aligns with defensive coding practices 。

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View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/542#note_126334
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