linux-kernel - Re: [PATCH] x86/Hyper-V: Fix definition HV_MAX_FLUSH_REP

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Message-ID: <alpine.DEB.2.21.1903200928100.1816@nanos.tec.linutronix.de>
Date:   Wed, 20 Mar 2019 09:29:32 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Paolo Bonzini <pbonzini@...hat.com>
cc:     lantianyu1986@...il.com, Lan Tianyu <Tianyu.Lan@...rosoft.com>,
        kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        sashal@...nel.org, mingo@...hat.com, bp@...en8.de, hpa@...or.com,
        x86@...nel.org, rkrcmar@...hat.com, devel@...uxdriverproject.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        michael.h.kelley@...rosoft.com, vkuznets@...hat.com,
        stable@...r.kernel.org
Subject: Re: [PATCH] x86/Hyper-V: Fix definition HV_MAX_FLUSH_REP_COUNT

On Fri, 15 Mar 2019, Paolo Bonzini wrote:

> On 22/02/19 11:48, lantianyu1986@...il.com wrote:
> > From: Lan Tianyu <Tianyu.Lan@...rosoft.com>
> > 
> > The max flush rep count of HvFlushGuestPhysicalAddressList hypercall
> > is equal with how many entries of union hv_gpa_page_range can be populated
> > into the input parameter page. The origin code lacks parenthesis around
> > PAGE_SIZE - 2 * sizeof(u64). This patch is to fix it.
> > 
> > Cc: <stable@...r.kernel.org>
> > Fixs: cc4edae4b9(x86/hyper-v: Add HvFlushGuestAddressList hypercall support)
> > Signed-off-by: Lan Tianyu <Tianyu.Lan@...rosoft.com>
> > ---
> >  arch/x86/include/asm/hyperv-tlfs.h | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
> > index 705dafc2d11a..2bdbbbcfa393 100644
> > --- a/arch/x86/include/asm/hyperv-tlfs.h
> > +++ b/arch/x86/include/asm/hyperv-tlfs.h
> > @@ -841,7 +841,7 @@ union hv_gpa_page_range {
> >   * count is equal with how many entries of union hv_gpa_page_range can
> >   * be populated into the input parameter page.
> >   */
> > -#define HV_MAX_FLUSH_REP_COUNT (PAGE_SIZE - 2 * sizeof(u64) /	\
> > +#define HV_MAX_FLUSH_REP_COUNT ((PAGE_SIZE - 2 * sizeof(u64)) /	\
> >  				sizeof(union hv_gpa_page_range))
> >  
> >  struct hv_guest_mapping_flush_list {
> > 
> 
> Queued for after he merge window, with the fixed "Fixes" tag.

That's upstream already:

  9cd05ad2910b ("x86/hyper-v: Fix definition of HV_MAX_FLUSH_REP_COUNT")

Thanks,

	tglx