linux-kernel - Re: [PATCH 2/3] iommu/dma: Move public interfaces to linux/iommu.h

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Message-ID: <YwNmosMGZdGtY3LX@infradead.org>
Date:   Mon, 22 Aug 2022 04:21:06 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Robin Murphy <robin.murphy@....com>
Cc:     joro@...tes.org, will@...nel.org, catalin.marinas@....com,
        jean-philippe@...aro.org, inki.dae@...sung.com,
        sw0312.kim@...sung.com, kyungmin.park@...sung.com,
        tglx@...utronix.de, maz@...nel.org, alex.williamson@...hat.com,
        cohuck@...hat.com, iommu@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org, linux-acpi@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Subject: Re: [PATCH 2/3] iommu/dma: Move public interfaces to linux/iommu.h

> diff --git a/include/linux/iommu.h b/include/linux/iommu.h
> index 70393fbb57ed..79cb6eb560a8 100644
> --- a/include/linux/iommu.h
> +++ b/include/linux/iommu.h
> @@ -1059,4 +1059,40 @@ void iommu_debugfs_setup(void);
>  static inline void iommu_debugfs_setup(void) {}
>  #endif
>  
> +#ifdef CONFIG_IOMMU_DMA
> +#include <linux/msi.h>

I don't think msi.h is actually needed here.

Just make the struct msi_desc and struct msi_msg forward declarations
unconditional and we should be fine.