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Message-ID: <20231018062439.GA18260@lst.de>
Date: Wed, 18 Oct 2023 08:24:39 +0200
From: Christoph Hellwig <hch@....de>
To: Rick Edgecombe <rick.p.edgecombe@...el.com>
Cc: x86@...nel.org, tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
dave.hansen@...ux.intel.com, hpa@...or.com, luto@...nel.org,
peterz@...radead.org, kirill.shutemov@...ux.intel.com,
elena.reshetova@...el.com, isaku.yamahata@...el.com,
seanjc@...gle.com, Michael Kelley <mikelley@...rosoft.com>,
thomas.lendacky@....com, decui@...rosoft.com,
sathyanarayanan.kuppuswamy@...ux.intel.com, linux-mm@...ck.org,
linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
Christoph Hellwig <hch@....de>,
Marek Szyprowski <m.szyprowski@...sung.com>,
Robin Murphy <robin.murphy@....com>, iommu@...ts.linux.dev
Subject: Re: [PATCH 06/10] dma: Use free_decrypted_pages()
On Tue, Oct 17, 2023 at 01:25:01PM -0700, Rick Edgecombe wrote:
> struct cma;
>
> @@ -165,7 +166,7 @@ static inline struct page *dma_alloc_contiguous(struct device *dev, size_t size,
> static inline void dma_free_contiguous(struct device *dev, struct page *page,
> size_t size)
> {
> - __free_pages(page, get_order(size));
> + free_decrypted_pages((unsigned long)page_address(page), get_order(size));
CMA can be highmem, so this won't work totally independent of what
free_decrypted_pages actually does. Also please avoid the overly long line.
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