linux-kernel - Re: [PATCH] kthread: export park/unpark facility

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Message-ID: <559DE93D.6030608@hurleysoftware.com>
Date:	Wed, 08 Jul 2015 23:23:41 -0400
From:	Peter Hurley <peter@...leysoftware.com>
To:	jt@....hp.com
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Rusty Russell <rusty@...tcorp.com.au>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kthread: export park/unpark facility

On 07/08/2015 08:40 PM, Jean Tourrilhes wrote:
> 	Hi,
> 
> 	The kthread park/unpark facility is not used in the kernel

kernel/smpboot.c ?


> , so one would assume that it's made for kernel modules. This patch should
> definitely help most modules.
> 	Patch untested, at your own risks...
> 	Regards,
> 
> 	Jean
> 
> Signed-off-by: Jean Tourrilhes <jt@....hp.com>
> 
> diff -u -p linux-3.18.17/kernel/kthread.j2.c linux-3.18.17/kernel/kthread.c
> --- linux-3.18.17/kernel/kthread.j2.c	2015-07-08 17:01:39.010554169 -0700
> +++ linux-3.18.17/kernel/kthread.c	2015-07-08 17:09:13.016096189 -0700
> @@ -97,6 +97,7 @@ bool kthread_should_park(void)
>  {
>  	return test_bit(KTHREAD_SHOULD_PARK, &to_kthread(current)->flags);
>  }
> +EXPORT_SYMBOL(kthread_should_park);
>  
>  /**
>   * kthread_freezable_should_stop - should this freezable kthread return now?
> @@ -171,6 +172,7 @@ void kthread_parkme(void)
>  {
>  	__kthread_parkme(to_kthread(current));
>  }
> +EXPORT_SYMBOL(kthread_parkme);
>  
>  static int kthread(void *_create)
>  {
> @@ -411,6 +413,7 @@ void kthread_unpark(struct task_struct *
>  	if (kthread)
>  		__kthread_unpark(k, kthread);
>  }
> +EXPORT_SYMBOL(kthread_unpark);
>  
>  /**
>   * kthread_park - park a thread created by kthread_create().
> @@ -441,6 +444,7 @@ int kthread_park(struct task_struct *k)
>  	}
>  	return ret;
>  }
> +EXPORT_SYMBOL(kthread_park);
>  
>  /**
>   * kthread_stop - stop a thread created by kthread_create().

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