[GitHub] [incubator-nuttx] Ouss4 commented on a change in pull request #3121: mm/heap: Move semaphore related declaration to private header

[GitBox <gi...@apache.org>]

Ouss4 commented on a change in pull request #3121:
URL: https://github.com/apache/incubator-nuttx/pull/3121#discussion_r598108264



##########
File path: arch/risc-v/src/common/riscv_idle.c
##########
@@ -74,15 +74,6 @@ void up_idle(void)
    * sleep in a reduced power mode until an interrupt occurs to save power
    */
 
-  /* This is a kludge that I still don't understand.  The call to

Review comment:
       @xiaoxiang781216 did you try to remove the "kludge"?
   It's this part:
   ```
   #ifdef CONFIG_SCHED_WORKQUEUE
     irqstate_t flags = enter_critical_section();
     leave_critical_section(flags);
   #endif
   ```
   This also could be another thing that came from the MIPS port.  We had this bug in MIPS where an interrupt mask wasn't set correctly and disabling/enabling interrupts was just clearing that mask, now it's fixed.
   
   RISC-V chips are using a custom idle loop that doesn't include this kludge.

##########
File path: sched/init/nx_start.c
##########
@@ -762,12 +762,6 @@ void nx_start(void)
 
   DEBUGASSERT(this_cpu() == 0 && CONFIG_MAX_TASKS > CONFIG_SMP_NCPUS);
 
-  /* Take the memory manager semaphore on this CPU so that it will not be
-   * available on the other CPUs until we have finished initialization.
-   */
-
-  DEBUGVERIFY(kmm_trysemaphore());

Review comment:
       Taking this semaphore is not necessary?




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