linux-kernel - Re: [PATCH 03/21] KVM: x86/mmu: Use consistent "mc" name for kvm_mmu_memory

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Date:   Wed, 10 Jun 2020 15:03:35 -0700
From:   Ben Gardon <bgardon@...gle.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     Marc Zyngier <maz@...nel.org>, Paul Mackerras <paulus@...abs.org>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        David Hildenbrand <david@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Claudio Imbrenda <imbrenda@...ux.ibm.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-mips@...r.kernel.org, kvm@...r.kernel.org,
        kvm-ppc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Peter Feiner <pfeiner@...gle.com>,
        Peter Shier <pshier@...gle.com>,
        Junaid Shahid <junaids@...gle.com>,
        Christoffer Dall <christoffer.dall@....com>
Subject: Re: [PATCH 03/21] KVM: x86/mmu: Use consistent "mc" name for
 kvm_mmu_memory_cache locals

On Fri, Jun 5, 2020 at 2:39 PM Sean Christopherson
<sean.j.christopherson@...el.com> wrote:
>
> Use "mc" for local variables to shorten line lengths and provide
> consistent names, which will be especially helpful when some of the
> helpers are moved to common KVM code in future patches.
>
> No functional change intended.
>
> Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
Reviewed-by: Ben Gardon <bgardon@...gle.com>
> ---
>  arch/x86/kvm/mmu/mmu.c | 24 ++++++++++++------------
>  1 file changed, 12 insertions(+), 12 deletions(-)
>
> diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
> index cbc101663a89..36c90f004ef4 100644
> --- a/arch/x86/kvm/mmu/mmu.c
> +++ b/arch/x86/kvm/mmu/mmu.c
> @@ -1060,27 +1060,27 @@ static void walk_shadow_page_lockless_end(struct kvm_vcpu *vcpu)
>         local_irq_enable();
>  }
>
> -static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache, int min)
> +static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *mc, int min)
>  {
>         void *obj;
>
> -       if (cache->nobjs >= min)
> +       if (mc->nobjs >= min)
>                 return 0;
> -       while (cache->nobjs < ARRAY_SIZE(cache->objects)) {
> -               if (cache->kmem_cache)
> -                       obj = kmem_cache_zalloc(cache->kmem_cache, GFP_KERNEL_ACCOUNT);
> +       while (mc->nobjs < ARRAY_SIZE(mc->objects)) {
> +               if (mc->kmem_cache)
> +                       obj = kmem_cache_zalloc(mc->kmem_cache, GFP_KERNEL_ACCOUNT);
>                 else
>                         obj = (void *)__get_free_page(GFP_KERNEL_ACCOUNT);
>                 if (!obj)
> -                       return cache->nobjs >= min ? 0 : -ENOMEM;
> -               cache->objects[cache->nobjs++] = obj;
> +                       return mc->nobjs >= min ? 0 : -ENOMEM;
> +               mc->objects[mc->nobjs++] = obj;
>         }
>         return 0;
>  }
>
> -static int mmu_memory_cache_free_objects(struct kvm_mmu_memory_cache *cache)
> +static int mmu_memory_cache_free_objects(struct kvm_mmu_memory_cache *mc)
>  {
> -       return cache->nobjs;
> +       return mc->nobjs;
>  }
>
>  static void mmu_free_memory_cache(struct kvm_mmu_memory_cache *mc)
> @@ -1395,10 +1395,10 @@ static struct kvm_rmap_head *gfn_to_rmap(struct kvm *kvm, gfn_t gfn,
>
>  static bool rmap_can_add(struct kvm_vcpu *vcpu)
>  {
> -       struct kvm_mmu_memory_cache *cache;
> +       struct kvm_mmu_memory_cache *mc;
>
> -       cache = &vcpu->arch.mmu_pte_list_desc_cache;
> -       return mmu_memory_cache_free_objects(cache);
> +       mc = &vcpu->arch.mmu_pte_list_desc_cache;
> +       return mmu_memory_cache_free_objects(mc);
>  }
>
>  static int rmap_add(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn)
> --
> 2.26.0
>