linux-kernel - Re: [PATCH v3 5/8] KVM: x86/mmu: Add a field to control memslot rmap allocation

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Date:   Mon, 10 May 2021 09:14:04 -0700
From:   Ben Gardon <bgardon@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     LKML <linux-kernel@...r.kernel.org>, kvm <kvm@...r.kernel.org>,
        Peter Xu <peterx@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Peter Shier <pshier@...gle.com>,
        Yulei Zhang <yulei.kernel@...il.com>,
        Wanpeng Li <kernellwp@...il.com>,
        Xiao Guangrong <xiaoguangrong.eric@...il.com>,
        Kai Huang <kai.huang@...el.com>,
        Keqian Zhu <zhukeqian1@...wei.com>
Subject: Re: [PATCH v3 5/8] KVM: x86/mmu: Add a field to control memslot rmap allocation

On Fri, May 7, 2021 at 1:28 AM Paolo Bonzini <pbonzini@...hat.com> wrote:
>
> On 07/05/21 01:44, Ben Gardon wrote:
> >>   struct kvm_vm_stat {
> >> @@ -1853,4 +1859,6 @@ static inline int kvm_cpu_get_apicid(int mps_cpu)
> >>
> >>   int kvm_cpu_dirty_log_size(void);
> >>
> >> +inline bool kvm_memslots_have_rmaps(struct kvm *kvm);
> > Woops, this shouldn't be marked inline as it creates build problems
> > for the next patch with some configs.
> >
>
> Possibly stupid (or at least lazy) question: why can't it be a "normal"
> static inline function?

That was my initial approach (hence the leftover inline) but I got
some warnings about a forward declaration of struct kvm because
arch/x86/include/asm/kvm_host.h doesn't include virt/kvm/kvm_host.h.
Maybe there's a way to fix that, but I didn't want to mess with it.

>
> Paolo
>