linux-kernel - Re: [PATCH 18/26] KVM: s390: Stop adding virt/kvm to the arch include path

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Date:   Mon, 18 Sep 2023 15:38:49 +0200
From:   Claudio Imbrenda <imbrenda@...ux.ibm.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Marc Zyngier <maz@...nel.org>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Huacai Chen <chenhuacai@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Anup Patel <anup@...infault.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Tony Krowiak <akrowiak@...ux.ibm.com>,
        Halil Pasic <pasic@...ux.ibm.com>,
        Jason Herne <jjherne@...ux.ibm.com>,
        Harald Freudenberger <freude@...ux.ibm.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Andy Lutomirski <luto@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
        linux-mips@...r.kernel.org, kvm@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, kvm-riscv@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        Anish Ghulati <aghulati@...gle.com>,
        Venkatesh Srinivas <venkateshs@...omium.org>,
        Andrew Thornton <andrewth@...gle.com>
Subject: Re: [PATCH 18/26] KVM: s390: Stop adding virt/kvm to the arch
 include path

On Fri, 15 Sep 2023 17:31:10 -0700
Sean Christopherson <seanjc@...gle.com> wrote:

> Don't add virt/kvm to KVM s390's include path, the headers in virt/kvm are
> intended to be used only by other code in virt/kvm, i.e. are "private" to
> the core KVM code.  It's not clear that s390 *ever* included a header from
> virt/kvm, i.e. odds are good the "-Ivirt/kvm" was copied from a x86's
> Makefile when s390 support was first added.
> 
> The only headers in virt/kvm at the time were the x86 specific ioapic.h,
> and iodev.h, neither of which shows up as an #include in the diff for the
> commit range 37817f2982d0f..e976a2b997fc4.
> 
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>
> ---
>  arch/s390/kvm/Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/s390/kvm/Makefile b/arch/s390/kvm/Makefile
> index 02217fb4ae10..f17249ab2a72 100644
> --- a/arch/s390/kvm/Makefile
> +++ b/arch/s390/kvm/Makefile
> @@ -5,7 +5,7 @@
>  
>  include $(srctree)/virt/kvm/Makefile.kvm
>  
> -ccflags-y := -Ivirt/kvm -Iarch/s390/kvm
> +ccflags-y := -Iarch/s390/kvm
>  
>  kvm-y += kvm-s390.o intercept.o interrupt.o priv.o sigp.o
>  kvm-y += diag.o gaccess.o guestdbg.o vsie.o pv.o

Acked-by: Claudio Imbrenda <imbrenda@...ux.ibm.com>