RTEMS | cpukit: Create DHRL Library for DRAM Latency Mitigation (!1193)

[Gedare Bloom (@gedare)]

Gedare Bloom started a new discussion on cpukit/dhrl/dhrl.c: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1193#note_150607

 > +    }
 > +
 > +    rtems_barrier_wait( ctx->tail_barrier, RTEMS_NO_TIMEOUT );
 > +  }
 > +}
 > +
 > +/* Internal Hybrid Barrier Execution */
 > +static volatile void *dhrl_fetch_data(
 > +  struct dhrl_control *ctx,
 > +  volatile void       *addr_a,
 > +  volatile void       *addr_b
 > +)
 > +{
 > +  volatile void *winning_result;
 > +
 > +  rtems_mutex_lock( &ctx->mutex );

This mutex is only acquired in this function. Is this function actually called in parallel? I only see sequential execution paths that call to it, so I'm not sure what this mutex is protecting.

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1193#note_150607
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