sync: Add comment

This commit is contained in:
Ben Gamari 2013-07-07 13:54:19 -04:00 committed by Piotr Esden-Tempski
parent 78081bd794
commit 11ea9b090c

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@ -59,6 +59,7 @@ void mutex_lock(mutex_t *m)
void mutex_unlock(mutex_t *m)
{
/* Ensure accesses to protected resource are finished */
__dmb();
/* Free the lock. */