linux-kernel - Re: [PATCH v2 1/5] KVM: Add arch specific interfaces for sampling guest callchains

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Date:   Mon,  9 Oct 2023 11:17:51 +0800
From:   Tianyi Liu <i.pear@...look.com>
To:     i.pear@...look.com
Cc:     acme@...nel.org, adrian.hunter@...el.com,
        alexander.shishkin@...ux.intel.com, irogers@...gle.com,
        jolsa@...nel.org, kvm@...r.kernel.org, kvmarm@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org, mark.rutland@....com,
        mingo@...hat.com, namhyung@...nel.org, pbonzini@...hat.com,
        peterz@...radead.org, seanjc@...gle.com, x86@...nel.org
Subject: Re: [PATCH v2 1/5] KVM: Add arch specific interfaces for sampling guest callchains

> All warnings (new ones prefixed by >>):
> 
>    arch/x86/kvm/x86.c: In function 'kvm_arch_vcpu_read_virt':
> >> arch/x86/kvm/x86.c:12917:42: warning: passing argument 2 of 'kvm_read_guest_virt' makes integer from pointer without a cast [-Wint-conversion]
>    12917 |         return kvm_read_guest_virt(vcpu, addr, dest, length, &e) == X86EMUL_CONTINUE;
>          |                                          ^~~~
>          |                                          |
>          |                                          void *
>    arch/x86/kvm/x86.c:7388:38: note: expected 'gva_t' {aka 'long unsigned int'} but argument is of type 'void *'
>     7388 |                                gva_t addr, void *val, unsigned int bytes,
>          |                                ~~~~~~^~~~
> 

Terribly sorry for the build warnings, which is caused by type casting.
Will be fixed in the next version.