RTEMS | bsps/shared/.../gpio-support.c: Address maybe uninitialized warning (!1229)

[Joel Sherrill (@joel)]

Joel Sherrill created a merge request: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1229

Project:Branches: joel/rtems:gpio-maybe-uninitialized to rtems/rtos/rtems:main
Author:   Joel Sherrill
Assignee: Joel Sherrill


## Summary

bsps/shared/.../gpio-support.c: Address maybe uninitialized warning

This code was flagged as maybe-uninitialized when compiling at -Og.
The underlying problem was functional code in an assert(). If
compiled with asserts disabled, there would have been no mutex
lock/unlock. Changed the macros to obtain and release the mutex
independent of assert() being enabled or not and switched to using
the RTEMS assert _Assert() which lets this check follow the
RTEMS_DEBUG setting.


## Generative AI

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Only humans were involved in the creation of this MR.


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