linux-kernel - [PATCH v1 01/11] mm: provide vm_normal_(page|folio)_pmd() with CONFIG_PGTABLE_HAS_HUGE

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Message-ID: <20240802155524.517137-2-david@redhat.com>
Date: Fri,  2 Aug 2024 17:55:14 +0200
From: David Hildenbrand <david@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: linux-mm@...ck.org,
	linux-doc@...r.kernel.org,
	kvm@...r.kernel.org,
	linux-s390@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	David Hildenbrand <david@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Matthew Wilcox (Oracle)" <willy@...radead.org>,
	Jonathan Corbet <corbet@....net>,
	Christian Borntraeger <borntraeger@...ux.ibm.com>,
	Janosch Frank <frankja@...ux.ibm.com>,
	Claudio Imbrenda <imbrenda@...ux.ibm.com>,
	Heiko Carstens <hca@...ux.ibm.com>,
	Vasily Gorbik <gor@...ux.ibm.com>,
	Alexander Gordeev <agordeev@...ux.ibm.com>,
	Sven Schnelle <svens@...ux.ibm.com>,
	Gerald Schaefer <gerald.schaefer@...ux.ibm.com>
Subject: [PATCH v1 01/11] mm: provide vm_normal_(page|folio)_pmd() with CONFIG_PGTABLE_HAS_HUGE_LEAVES

We want to make use of vm_normal_page_pmd() in generic page table
walking code where we might walk hugetlb folios that are mapped by PMDs
even without CONFIG_TRANSPARENT_HUGEPAGE.

So let's expose vm_normal_page_pmd() + vm_normal_folio_pmd() with
CONFIG_PGTABLE_HAS_HUGE_LEAVES.

Signed-off-by: David Hildenbrand <david@...hat.com>
---
 mm/memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory.c b/mm/memory.c
index 4c8716cb306c..29772beb3275 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -666,7 +666,7 @@ struct folio *vm_normal_folio(struct vm_area_struct *vma, unsigned long addr,
 	return NULL;
 }
 
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+#ifdef CONFIG_PGTABLE_HAS_HUGE_LEAVES
 struct page *vm_normal_page_pmd(struct vm_area_struct *vma, unsigned long addr,
 				pmd_t pmd)
 {
-- 
2.45.2