linux-kernel - Re: [PATCH RFC v1 7/7] swiotlb: fix the slot

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Message-ID: <YqGADnHAP7HYPvRr@infradead.org>
Date:   Wed, 8 Jun 2022 22:07:26 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Dongli Zhang <dongli.zhang@...cle.com>
Cc:     iommu@...ts.linux-foundation.org, xen-devel@...ts.xenproject.org,
        x86@...nel.org, linuxppc-dev@...ts.ozlabs.org,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, hch@...radead.org,
        m.szyprowski@...sung.com, jgross@...e.com, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
        sstabellini@...nel.org, mpe@...erman.id.au, konrad.wilk@...cle.com,
        mst@...hat.com, jasowang@...hat.com, joe.jin@...cle.com
Subject: Re: [PATCH RFC v1 7/7] swiotlb: fix the slot_addr() overflow

On Wed, Jun 08, 2022 at 05:55:53PM -0700, Dongli Zhang wrote:
> +#define slot_addr(start, idx)	((start) + \
> +				(((unsigned long)idx) << IO_TLB_SHIFT))

Please just convert it to an inline function.