RTEMS | SMP: Add FMLP-Short and FMLP-Long locking protocols (!882)

[Gedare Bloom (@gedare)]

Gedare Bloom commented on a discussion on cpukit/include/rtems/rtems/attr.h: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/882#note_149095

 > +#define RTEMS_FLEXIBLE_MULTIPROCESSOR_LOCKING_LONG 0x00000400
 > +
 > +/* Generated from spec:/rtems/attr/if/flexible-multiprocessor-locking-short */
 > +
 > +/**
 > + * @ingroup RTEMSAPIClassicAttr
 > + *
 > + * @brief This attribute constant indicates that the Classic API semaphore
 > + *   created by rtems_semaphore_create() shall use the Flexible Multiprocessor
 > + *   Locking Protocol - Short variant (FMLP-S).
 > + *
 > + * @par Notes
 > + * The FMLP-S uses non-preemptive execution for short critical sections. The
 > + * semaphore shall be a binary semaphore (#RTEMS_BINARY_SEMAPHORE).
 > + */
 > +#define RTEMS_FLEXIBLE_MULTIPROCESSOR_LOCKING_SHORT 0x00000200

@joel what are your thoughts on this?

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/882#note_149095
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