linux-kernel - Re: [RFC -v7 PATCH 5/7] export pid symbols needed for kvm_vcpu_on

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Date:	Mon, 31 Jan 2011 12:51:39 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Rik van Riel <riel@...hat.com>
Cc:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Avi Kiviti <avi@...hat.com>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Mike Galbraith <efault@....de>,
	Chris Wright <chrisw@...s-sol.org>, ttracy@...hat.com,
	"Nakajima, Jun" <jun.nakajima@...el.com>
Subject: Re: [RFC -v7 PATCH 5/7] export pid symbols needed for
 kvm_vcpu_on_spin

On Wed, 2011-01-26 at 17:23 -0500, Rik van Riel wrote:
> Export the symbols required for a race-free kvm_vcpu_on_spin.

Avi, you asked for an example of why I hated KVM as a module :-)

> Signed-off-by: Rik van Riel <riel@...hat.com>
> 
> diff --git a/kernel/fork.c b/kernel/fork.c
> index 3b159c5..adc8f47 100644
> --- a/kernel/fork.c
> +++ b/kernel/fork.c
> @@ -191,6 +191,7 @@ void __put_task_struct(struct task_struct *tsk)
>  	if (!profile_handoff_task(tsk))
>  		free_task(tsk);
>  }
> +EXPORT_SYMBOL_GPL(__put_task_struct);
>  
>  /*
>   * macro override instead of weak attribute alias, to workaround
> diff --git a/kernel/pid.c b/kernel/pid.c
> index 39b65b6..02f2212 100644
> --- a/kernel/pid.c
> +++ b/kernel/pid.c
> @@ -435,6 +435,7 @@ struct pid *get_task_pid(struct task_struct *task, enum pid_type type)
>  	rcu_read_unlock();
>  	return pid;
>  }
> +EXPORT_SYMBOL_GPL(get_task_pid);
>  
>  struct task_struct *get_pid_task(struct pid *pid, enum pid_type type)
>  {
> @@ -446,6 +447,7 @@ struct task_struct *get_pid_task(struct pid *pid, enum pid_type type)
>  	rcu_read_unlock();
>  	return result;
>  }
> +EXPORT_SYMBOL_GPL(get_pid_task);
>  
>  struct pid *find_get_pid(pid_t nr)
>  {


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