Re: RT kernel on Acer laptop unreliable

[Sebastian Andrzej Siewior <bigeasy@linutronix.de>]

On 2017-09-05 11:17:13 [+0200], To Jacek Konieczny wrote:
> I'm sorry, I missed that. What about this on-top?
> 
> diff --git a/include/linux/locallock.h b/include/linux/locallock.h
> index eeb1a66df402..298afcd8e219 100644
> --- a/include/linux/locallock.h
> +++ b/include/linux/locallock.h
> @@ -61,6 +61,9 @@ static inline int __local_trylock(struct local_irq_lock *lv)
>  		lv->owner = current;
>  		lv->nestcnt = 1;
>  		return 1;
> +	} else if (lv->owner == current) {
> +		lv->nestcnt++;
> +		return 1;
>  	}
>  	return 0;
>  }

I am going to split up that part out in a separate patch and also add
the !RT part to it.

--- a/include/linux/locallock.h
+++ b/include/linux/locallock.h
@@ -68,6 +68,9 @@ static inline int __local_trylock(struct
 		lv->owner = current;
 		lv->nestcnt = 1;
 		return 1;
+	} else if (lv->owner == current) {
+		lv->nestcnt++;
+		return 1;
 	}
 	return 0;
 }
@@ -238,6 +241,12 @@ static inline int __local_unlock_irqrest
 
 static inline void local_irq_lock_init(int lvar) { }
 
+#define local_trylock(lvar)					\
+	({							\
+		preempt_disable();				\
+		1;						\
+	})
+
 #define local_lock(lvar)			preempt_disable()
 #define local_unlock(lvar)			preempt_enable()
 #define local_lock_irq(lvar)			local_irq_disable()