linux-kernel - Re: [PATCH v2 07/16] mm: introduce io_remap_pfn_range

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Message-ID: <ce124bd3-ee49-498a-ae23-47a4797f03bd@lucifer.local>
Date: Fri, 12 Sep 2025 11:23:38 +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>,
        Guo Ren <guoren@...nel.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
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Subject: Re: [PATCH v2 07/16] mm: introduce io_remap_pfn_range_[prepare,
 complete]()

Hi Andrew,

Could you apply the below fix-patch to address the delights and wonders of
arch-specific header stuff? :)

Cheers, Lorenzo

----8<----
>From 1a8ddbbb3aab15104e7b7b5b7a5a286dd23d8325 Mon Sep 17 00:00:00 2001
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Date: Fri, 12 Sep 2025 10:58:23 +0100
Subject: [PATCH] sparc fix

Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
---
 arch/sparc/include/asm/pgtable_32.h | 3 +++
 arch/sparc/include/asm/pgtable_64.h | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h
index cfd764afc107..30749c5ffe95 100644
--- a/arch/sparc/include/asm/pgtable_32.h
+++ b/arch/sparc/include/asm/pgtable_32.h
@@ -397,6 +397,9 @@ __get_iospace (unsigned long addr)

 int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long,
 		    unsigned long, pgprot_t);
+void remap_pfn_range_prepare(struct vm_area_desc *desc, unsigned long pfn);
+int remap_pfn_range_complete(struct vm_area_struct *vma, unsigned long addr,
+		unsigned long pfn, unsigned long size, pgprot_t pgprot);

 static inline unsigned long calc_io_remap_pfn(unsigned long pfn)
 {
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index b8000ce4b59f..b06f55915653 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h
@@ -1050,6 +1050,9 @@ int page_in_phys_avail(unsigned long paddr);

 int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long,
 		    unsigned long, pgprot_t);
+void remap_pfn_range_prepare(struct vm_area_desc *desc, unsigned long pfn);
+int remap_pfn_range_complete(struct vm_area_struct *vma, unsigned long addr,
+		unsigned long pfn, unsigned long size, pgprot_t pgprot);

 void adi_restore_tags(struct mm_struct *mm, struct vm_area_struct *vma,
 		      unsigned long addr, pte_t pte);
--
2.51.0