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SubjectRe: [RFC/PATCH 1/5] context tracking: conditionalize guest support based on CONFIG_KVM
On Wed, Feb 20, 2013 at 11:41:38AM -0800, Kevin Hilman wrote:
> So that it can build on !KVM systems too.
>
> Signed-off-by: Kevin Hilman <khilman@linaro.org>
> ---
> kernel/context_tracking.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/kernel/context_tracking.c b/kernel/context_tracking.c
> index 74f68f4..6fe96b1 100644
> --- a/kernel/context_tracking.c
> +++ b/kernel/context_tracking.c
> @@ -1,5 +1,7 @@
> #include <linux/context_tracking.h>
> +#ifdef CONFIG_KVM
> #include <linux/kvm_host.h>
> +#endif

The header should take care of the off-case, no need to ifdef its inclusion.

> #include <linux/rcupdate.h>
> #include <linux/sched.h>
> #include <linux/hardirq.h>
> @@ -62,6 +64,7 @@ void user_exit(void)
> local_irq_restore(flags);
> }
>
> +#ifdef CONFIG_KVM
> void guest_enter(void)
> {
> if (vtime_accounting_enabled())
> @@ -79,6 +82,7 @@ void guest_exit(void)
> __guest_exit();
> }
> EXPORT_SYMBOL_GPL(guest_exit);
> +#endif

Kvm might be built as a module so we can't actually do this unfortunately.

Thanks.

>
> void context_tracking_task_switch(struct task_struct *prev,
> struct task_struct *next)
> --
> 1.8.1.2
>


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