cpu_idle_loop logical in book is wrong, based on linux v3.10 code, the

schedule_preempt_disabled() is in while(1) scope.

Timers/linux-timers-3.md

@@ -51,16 +51,17 @@ static void cpu_idle_loop(void)
 {
 	while (1) {
 		while (!need_resched()) {
+			...
+			...
+			...
+		    /* the main idle function */
+			cpuidle_idle_call();
+		}
 		...
 		...
 		...
-	    /* the main idle function */
-		cpuidle_idle_call();
+		schedule_preempt_disabled();
 	}
-	...
-	...
-	...
-	schedule_preempt_disabled();
 }
 ```
 

contributors.md

@@ -134,3 +134,4 @@ Thank you to all contributors:
 * [Yuxin Wu](https://github.com/chaffz)
 * [Biao Ding](https://github.com/SmallPond)
 * [Arfy slowy](https://github.com/slowy07)
+* [Junbo Jiang](https://github.com/junbo42)