linux-kernel - Re: [PATCH] kvm: Make kvm

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Date:	Mon, 05 Aug 2013 15:35:05 -0700
From:	David Daney <ddaney.cavm@...il.com>
To:	Andi Kleen <andi@...stfloor.org>, Andi Kleen <ak@...ux.intel.com>
CC:	gleb@...hat.com, kvm@...r.kernel.org, pbonzini@...hat.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kvm: Make kvm_rebooting visible

On 08/05/2013 03:12 PM, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
>
> kvm_rebooting is referenced from assembler code, thus
> needs to be visible.
>
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> ---
>   virt/kvm/kvm_main.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index 1580dd4..eff6abd 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -95,7 +95,7 @@ static void hardware_disable_all(void);
>
>   static void kvm_io_bus_destroy(struct kvm_io_bus *bus);
>
> -bool kvm_rebooting;
> +__visible bool kvm_rebooting;
>   EXPORT_SYMBOL_GPL(kvm_rebooting);

How many of these are there kernel wide?

Could you do something like this instead:

DEFINE_AND_EXPORT_GPL(bool, kvm_rebooting);

The definition of DEFINE_AND_EXPORT_GPL(_type, _name) is left as an 
exercise for the reader.

David Daney


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