linux-kernel - Re: [PATCH] Use EXPORT_SYMBOL for pv_lock

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Date:	Wed, 20 Aug 2008 21:29:12 +0200
From:	drago01 <drago01@...il.com>
To:	"Jeremy Fitzhardinge" <jeremy@...p.org>
Cc:	"kernel list" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Use EXPORT_SYMBOL for pv_lock_ops

On Wed, Aug 20, 2008 at 9:25 PM, drago01 <drago01@...il.com> wrote:
> On Wed, Aug 20, 2008 at 7:06 AM, Jeremy Fitzhardinge <jeremy@...p.org> wrote:
>> drago01 wrote:
>>> Hi,
>>>
>>> It seems that in 2.6.27 pv_lock_ops is now GPL only which breaks
>>> binary drivers because they pick it up implicitly when CONFIG_PARAVIRT
>>> is enabled.
>>> (see http://www.nvnews.net/vbulletin/showpost.php?p=1750090&postcount=2)
>>> Is there a reason for doing this?
>>> As some other pv_* are exported to all modules can this be done for
>>> this too? (there should be no difference between CONFIG_PARAVIRT on or
>>> of for GPL'd symbols).
>>
>> Yeah, they're just GPL by default, but the lock code is not exported GPL
>> so there's no reason why lock_ops should be.
>>
>>    J
>>
>>
>
> Use EXPORT_SYMBOL for pv_lock_ops to preserve the behavior between
> CONFIG_PARAVIRT set and unset.
> Currently we only used _GPL when the non paravirt symbols are GPL only too.
>
> Signed-off-by: Adel Gadllah <adel.gadllah@...il.com>
>
> diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
> index 94da4d5..300da17 100644
> --- a/arch/x86/kernel/paravirt.c
> +++ b/arch/x86/kernel/paravirt.c
> @@ -471,7 +471,7 @@ struct pv_lock_ops pv_lock_ops = {
>        .spin_unlock = __ticket_spin_unlock,
>  #endif
>  };
> -EXPORT_SYMBOL_GPL(pv_lock_ops);
> +EXPORT_SYMBOL(pv_lock_ops);
>
>  EXPORT_SYMBOL_GPL(pv_time_ops);
>  EXPORT_SYMBOL    (pv_cpu_ops);
>

Seems like Jeremy already sent a patch, ignore this one.
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