linux-kernel - Re: [RFC 1/1] swiotlb: Reduce calls to swiotlb_find

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Message-ID: <20240627152513.GA23497@lst.de>
Date: Thu, 27 Jun 2024 17:25:13 +0200
From: "hch@....de" <hch@....de>
To: Michael Kelley <mhklinux@...look.com>
Cc: Petr Tesařík <petr@...arici.cz>,
	"hch@....de" <hch@....de>,
	"robin.murphy@....com" <robin.murphy@....com>,
	"joro@...tes.org" <joro@...tes.org>,
	"will@...nel.org" <will@...nel.org>,
	"jgross@...e.com" <jgross@...e.com>,
	"sstabellini@...nel.org" <sstabellini@...nel.org>,
	"oleksandr_tyshchenko@...m.com" <oleksandr_tyshchenko@...m.com>,
	"m.szyprowski@...sung.com" <m.szyprowski@...sung.com>,
	"iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>
Subject: Re: [RFC 1/1] swiotlb: Reduce calls to swiotlb_find_pool()

On Thu, Jun 27, 2024 at 02:59:03PM +0000, Michael Kelley wrote:
> Conceptually, it's still being used as a boolean function based on
> whether the return value is NULL.  Renaming it to swiotlb_get_pool()
> more accurately describes the return value, but obscures the
> intent of determining if it is a swiotlb buffer.  I'll think about it.
> Suggestions are welcome.

Just keep is_swiotlb_buffer as a trivial inline helper that returns
bool.