linux-kernel - [PATCH v2 02/13] mm/hugetlb: Declare hugetlbfs_pagecache

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Date: Wed,  3 Jan 2024 17:14:12 +0800
From: peterx@...hat.com
To: linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Cc: James Houghton <jthoughton@...gle.com>,
	David Hildenbrand <david@...hat.com>,
	"Kirill A . Shutemov" <kirill@...temov.name>,
	Yang Shi <shy828301@...il.com>,
	peterx@...hat.com,
	linux-riscv@...ts.infradead.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Aneesh Kumar K . V" <aneesh.kumar@...nel.org>,
	Rik van Riel <riel@...riel.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Axel Rasmussen <axelrasmussen@...gle.com>,
	Mike Rapoport <rppt@...nel.org>,
	John Hubbard <jhubbard@...dia.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Michael Ellerman <mpe@...erman.id.au>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Andrew Jones <andrew.jones@...ux.dev>,
	linuxppc-dev@...ts.ozlabs.org,
	Mike Kravetz <mike.kravetz@...cle.com>,
	Muchun Song <muchun.song@...ux.dev>,
	linux-arm-kernel@...ts.infradead.org,
	Jason Gunthorpe <jgg@...dia.com>,
	Christoph Hellwig <hch@...radead.org>,
	Lorenzo Stoakes <lstoakes@...il.com>,
	Matthew Wilcox <willy@...radead.org>
Subject: [PATCH v2 02/13] mm/hugetlb: Declare hugetlbfs_pagecache_present() non-static

From: Peter Xu <peterx@...hat.com>

It will be used outside hugetlb.c soon.

Signed-off-by: Peter Xu <peterx@...hat.com>
---
 include/linux/hugetlb.h | 9 +++++++++
 mm/hugetlb.c            | 4 ++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index c1ee640d87b1..e8eddd51fc17 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -174,6 +174,9 @@ u32 hugetlb_fault_mutex_hash(struct address_space *mapping, pgoff_t idx);
 
 pte_t *huge_pmd_share(struct mm_struct *mm, struct vm_area_struct *vma,
 		      unsigned long addr, pud_t *pud);
+bool hugetlbfs_pagecache_present(struct hstate *h,
+				 struct vm_area_struct *vma,
+				 unsigned long address);
 
 struct address_space *hugetlb_page_mapping_lock_write(struct page *hpage);
 
@@ -1221,6 +1224,12 @@ static inline void hugetlb_register_node(struct node *node)
 static inline void hugetlb_unregister_node(struct node *node)
 {
 }
+
+static inline bool hugetlbfs_pagecache_present(
+    struct hstate *h, struct vm_area_struct *vma, unsigned long address)
+{
+	return false;
+}
 #endif	/* CONFIG_HUGETLB_PAGE */
 
 static inline spinlock_t *huge_pte_lock(struct hstate *h,
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 0d262784ce60..bfb52bb8b943 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -6017,8 +6017,8 @@ static vm_fault_t hugetlb_wp(struct mm_struct *mm, struct vm_area_struct *vma,
 /*
  * Return whether there is a pagecache page to back given address within VMA.
  */
-static bool hugetlbfs_pagecache_present(struct hstate *h,
-			struct vm_area_struct *vma, unsigned long address)
+bool hugetlbfs_pagecache_present(struct hstate *h,
+				 struct vm_area_struct *vma, unsigned long address)
 {
 	struct address_space *mapping = vma->vm_file->f_mapping;
 	pgoff_t idx = linear_page_index(vma, address);
-- 
2.41.0