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SubjectRe: [PATCH v3 2/5] x86: hv: hv_init.c: Add functions to allocate/deallocate page for Hyper-V
On Thu, Jun 27, 2019 at 11:38:14PM +0200, Thomas Gleixner wrote:
> Maya,
>
> On Tue, 18 Jun 2019, Maya Nakamura wrote:
>
> > diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
> > index 0e033ef11a9f..e8960a83add7 100644
> > --- a/arch/x86/hyperv/hv_init.c
> > +++ b/arch/x86/hyperv/hv_init.c
> > @@ -37,6 +37,20 @@ EXPORT_SYMBOL_GPL(hyperv_pcpu_input_arg);
> > u32 hv_max_vp_index;
> > EXPORT_SYMBOL_GPL(hv_max_vp_index);
> >
> > +void *hv_alloc_hyperv_page(void)
> > +{
> > + BUILD_BUG_ON(PAGE_SIZE != HV_HYP_PAGE_SIZE);
> > +
> > + return (void *)__get_free_page(GFP_KERNEL);
> > +}
> > +EXPORT_SYMBOL_GPL(hv_alloc_hyperv_page);
> > +
> > +void hv_free_hyperv_page(unsigned long addr)
> > +{
> > + free_page(addr);
> > +}
> > +EXPORT_SYMBOL_GPL(hv_free_hyperv_page);
>
> These functions need to be declared in a header file.
>
> Thanks,
>
> tglx
>
Thank you for pointing that out, Thomas. I will resubmit my patch set to
include a header file with the function prototypes.

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