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sched_unlock: remove redundant/stale logic and comment

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YAMAMOTO Takashi 2024-11-14 19:24:58 +09:00 committed by Xiang Xiao
parent fb92b60000
commit b4d8ac862e
1 changed files with 1 additions and 29 deletions
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30
sched/sched/sched_unlock.c
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@ -98,10 +98,6 @@ int sched_unlock(void)
sched_note_premption(rtcb, false);
#endif
/* Set the lock count to zero */
rtcb->lockcount = 0;
/* Release any ready-to-run tasks that have collected in
* g_pendingtasks.
*
@ -109,27 +105,7 @@ int sched_unlock(void)
* this task to be switched out!
*/
/* In the SMP case, the tasks remains pend(1) if we are
* in a critical section, i.e., g_cpu_irqlock is locked by other
* CPUs, or (2) other CPUs still have pre-emption disabled, i.e.,
* g_cpu_lockset is locked. In those cases, the release of the
* pending tasks must be deferred until those conditions are met.
*
* There are certain conditions that we must avoid by preventing
* releasing the pending tasks while within the critical section
* of other CPUs. This logic does that and there is matching
* logic in nxsched_add_readytorun to avoid starting new tasks
* within the critical section (unless the CPU is the holder of
* the lock).
*
* REVISIT: If this CPU is only one that holds the IRQ lock, then
* we should go ahead and release the pending tasks. See the logic
* leave_critical_section(): It will call nxsched_merge_pending()
* BEFORE it clears IRQ lock.
*/
if (!nxsched_islocked_tcb(rtcb) &&
list_pendingtasks()->head != NULL)
if (list_pendingtasks()->head != NULL)
{
if (nxsched_merge_pending())
{
@ -247,10 +223,6 @@ int sched_unlock(void)
sched_note_premption(rtcb, false);
#endif
/* Set the lock count to zero */
rtcb->lockcount = 0;
/* Release any ready-to-run tasks that have collected in
* g_pendingtasks.
*