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From:   Peter Xu <peterx@redhat.com>
To:     linux-kernel@vger.kernel.org, linux-mm@kvack.org
Cc:     Mike Kravetz <mike.kravetz@oracle.com>,
        "Kirill A . Shutemov" <kirill@shutemov.name>,
        Lorenzo Stoakes <lstoakes@gmail.com>,
        Axel Rasmussen <axelrasmussen@google.com>,
        Matthew Wilcox <willy@infradead.org>,
        John Hubbard <jhubbard@nvidia.com>,
        Mike Rapoport <rppt@kernel.org>, peterx@redhat.com,
        Hugh Dickins <hughd@google.com>,
        David Hildenbrand <david@redhat.com>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Rik van Riel <riel@surriel.com>,
        James Houghton <jthoughton@google.com>,
        Yang Shi <shy828301@gmail.com>,
        Jason Gunthorpe <jgg@nvidia.com>,
        Vlastimil Babka <vbabka@suse.cz>,
        Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH RFC 01/12] mm/hugetlb: Export hugetlbfs_pagecache_present()
Date:   Wed, 15 Nov 2023 20:28:57 -0500
Message-ID: <20231116012908.392077-2-peterx@redhat.com>
In-Reply-To: <20231116012908.392077-1-peterx@redhat.com>
References: <20231116012908.392077-1-peterx@redhat.com>
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It will be used outside hugetlb.c soon.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 include/linux/hugetlb.h | 3 +++
 mm/hugetlb.c            | 4 ++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 236ec7b63c54..bb07279b8991 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);
 
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 6feb3e0630d1..29705e5c6f40 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -6018,8 +6018,8 @@ 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