linux-kernel - Re: [PATCH v2 3/3] PCI: hv: Introduce hv_msi

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Date:   Mon, 03 Feb 2020 15:41:52 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Boqun Feng <boqun.feng@...il.com>, linux-pci@...r.kernel.org,
        linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     Michael Kelley <mikelley@...rosoft.com>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Sasha Levin <sashal@...nel.org>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Andrew Murray <andrew.murray@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Boqun Feng <boqun.feng@...il.com>
Subject: Re: [PATCH v2 3/3] PCI: hv: Introduce hv_msi_entry

Boqun Feng <boqun.feng@...il.com> writes:
>  /*
> diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
> index 6b79515abb82..3bdaa3b6e68f 100644
> --- a/arch/x86/include/asm/mshyperv.h
> +++ b/arch/x86/include/asm/mshyperv.h
> @@ -240,6 +240,11 @@ bool hv_vcpu_is_preempted(int vcpu);
>  static inline void hv_apic_init(void) {}
>  #endif
>  
> +#define hv_set_msi_address_from_desc(msi_entry, msi_desc)	\
> +do {								\
> +	(msi_entry)->address = (msi_desc)->msg.address_lo;	\
> +} while (0)

Any reason why this needs to be a macro? inlines are preferrred. They
are typesafe and readable.

Thanks,

        tglx