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sigtimedwait: When timer expires, up_unblock_task() is called. This is okay in the single CPU case because interrupts are disable in the timer interrupt handler. But it is insufficient in the SMP case. enter_ and leave_critical_section() must be called in order to manage spinlocks correctly.

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This commit is contained in:
Gregory Nutt
2017-02-24 10:07:23 -06:00
parent e08660c335
commit dca77fa06a
6 changed files with 49 additions and 7 deletions
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sched/task/task_exit.c
+1 -1
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@@ -76,7 +76,7 @@
* OK on success; or ERROR on failure
*
* Assumeptions:
* Interrupts are disabled.
* Executing within a critical section established by the caller.
*
****************************************************************************/