Prevent underflow for preempt_count_dec()

tenok-rtos · May 20, 2024 · 961902b · 961902b
1 parent 0396e2d
commit 961902b
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/kernel/kernel.c b/kernel/kernel.c
@@ -146,7 +146,8 @@ inline void preempt_count_inc(void)
 
 inline void preempt_count_dec(void)
 {
-    preempt_cnt--;
+    if (preempt_cnt > 0)
+        preempt_cnt--;
 }
 
 void preempt_disable(void)