linux-kernel - Re: [PATCH v4 08/14] mm: introduce io_remap_pfn_range

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Message-ID: <2cf129c4-627b-4a78-9ec3-cf43c95cf17d@lucifer.local>
Date: Thu, 18 Sep 2025 10:12:10 +0100
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Jonathan Corbet <corbet@....net>, Matthew Wilcox <willy@...radead.org>,
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Subject: Re: [PATCH v4 08/14] mm: introduce io_remap_pfn_range_[prepare,
 complete]()

Hi Andrew,

Could you also apply the below, so we propagate the fact that we don't need
io_remap_pfn_range_prot()?

Cheers, Lorenzo

----8<----
>From cc311eeb5b155601e3223797000f13e07b28bc30 Mon Sep 17 00:00:00 2001
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Date: Thu, 18 Sep 2025 07:43:21 +0100
Subject: [PATCH] fixup io_remap_pfn_range_[prepare, complete]

Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
---
 mm/internal.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/internal.h b/mm/internal.h
index 085e34f84bae..38607b2821d9 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -1670,7 +1670,7 @@ static inline int io_remap_pfn_range_complete(struct vm_area_struct *vma,
 		pgprot_t orig_prot)
 {
 	const unsigned long pfn = io_remap_pfn_range_pfn(orig_pfn, size);
-	const pgprot_t prot = io_remap_pfn_range_prot(orig_prot);
+	const pgprot_t prot = pgprot_decrypted(orig_prot);

 	return remap_pfn_range_complete(vma, addr, pfn, size, prot);
 }
--
2.51.0