linux-kernel - [PATCH v6 05/18] x86/mm: Convert pte_next_pfn() to pte_advance

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Message-Id: <20240215103205.2607016-6-ryan.roberts@arm.com>
Date: Thu, 15 Feb 2024 10:31:52 +0000
From: Ryan Roberts <ryan.roberts@....com>
To: Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Ard Biesheuvel <ardb@...nel.org>,
	Marc Zyngier <maz@...nel.org>,
	James Morse <james.morse@....com>,
	Andrey Ryabinin <ryabinin.a.a@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Matthew Wilcox <willy@...radead.org>,
	Mark Rutland <mark.rutland@....com>,
	David Hildenbrand <david@...hat.com>,
	Kefeng Wang <wangkefeng.wang@...wei.com>,
	John Hubbard <jhubbard@...dia.com>,
	Zi Yan <ziy@...dia.com>,
	Barry Song <21cnbao@...il.com>,
	Alistair Popple <apopple@...dia.com>,
	Yang Shi <shy828301@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>
Cc: Ryan Roberts <ryan.roberts@....com>,
	linux-arm-kernel@...ts.infradead.org,
	x86@...nel.org,
	linuxppc-dev@...ts.ozlabs.org,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v6 05/18] x86/mm: Convert pte_next_pfn() to pte_advance_pfn()

Core-mm needs to be able to advance the pfn by an arbitrary amount, so
override the new pte_advance_pfn() API to do so.

Signed-off-by: Ryan Roberts <ryan.roberts@....com>
---
 arch/x86/include/asm/pgtable.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index b50b2ef63672..69ed0ea0641b 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -955,13 +955,13 @@ static inline int pte_same(pte_t a, pte_t b)
 	return a.pte == b.pte;
 }
 
-static inline pte_t pte_next_pfn(pte_t pte)
+static inline pte_t pte_advance_pfn(pte_t pte, unsigned long nr)
 {
 	if (__pte_needs_invert(pte_val(pte)))
-		return __pte(pte_val(pte) - (1UL << PFN_PTE_SHIFT));
-	return __pte(pte_val(pte) + (1UL << PFN_PTE_SHIFT));
+		return __pte(pte_val(pte) - (nr << PFN_PTE_SHIFT));
+	return __pte(pte_val(pte) + (nr << PFN_PTE_SHIFT));
 }
-#define pte_next_pfn	pte_next_pfn
+#define pte_advance_pfn	pte_advance_pfn
 
 static inline int pte_present(pte_t a)
 {
-- 
2.25.1