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From:   Christoph Hellwig <hch@lst.de>
To:     Andrew Morton <akpm@linux-foundation.org>,
        Matthew Wilcox <willy@infradead.org>,
        Hugh Dickins <hughd@google.com>
Cc:     linux-afs@lists.infradead.org, linux-btrfs@vger.kernel.org,
        linux-ext4@vger.kernel.org, cluster-devel@redhat.com,
        linux-mm@kvack.org, linux-xfs@vger.kernel.org,
        linux-fsdevel@vger.kernel.org, linux-nilfs@vger.kernel.org
Subject: [PATCH 2/9] mm: make mapping_get_entry available outside of filemap.c
Date:   Wed, 18 Jan 2023 10:43:22 +0100
Message-Id: <20230118094329.9553-3-hch@lst.de>
In-Reply-To: <20230118094329.9553-1-hch@lst.de>
References: <20230118094329.9553-1-hch@lst.de>
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mapping_get_entry is useful for page cache API users that need to know
about xa_value internals.  Rename it and make it available in pagemap.h.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 include/linux/pagemap.h | 1 +
 mm/filemap.c            | 6 +++---
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 9f108168377195..24dedf6b12be49 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -507,6 +507,7 @@ pgoff_t page_cache_prev_miss(struct address_space *mapping,
 #define FGP_ENTRY		0x00000080
 #define FGP_STABLE		0x00000100
 
+void *filemap_get_entry(struct address_space *mapping, pgoff_t index);
 struct folio *__filemap_get_folio(struct address_space *mapping, pgoff_t index,
 		int fgp_flags, gfp_t gfp);
 struct page *pagecache_get_page(struct address_space *mapping, pgoff_t index,
diff --git a/mm/filemap.c b/mm/filemap.c
index c915ded191f03f..ed0583f9e27512 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1834,7 +1834,7 @@ EXPORT_SYMBOL(page_cache_prev_miss);
  */
 
 /*
- * mapping_get_entry - Get a page cache entry.
+ * filemap_get_entry - Get a page cache entry.
  * @mapping: the address_space to search
  * @index: The page cache index.
  *
@@ -1845,7 +1845,7 @@ EXPORT_SYMBOL(page_cache_prev_miss);
  *
  * Return: The folio, swap or shadow entry, %NULL if nothing is found.
  */
-static void *mapping_get_entry(struct address_space *mapping, pgoff_t index)
+void *filemap_get_entry(struct address_space *mapping, pgoff_t index)
 {
 	XA_STATE(xas, &mapping->i_pages, index);
 	struct folio *folio;
@@ -1915,7 +1915,7 @@ struct folio *__filemap_get_folio(struct address_space *mapping, pgoff_t index,
 	struct folio *folio;
 
 repeat:
-	folio = mapping_get_entry(mapping, index);
+	folio = filemap_get_entry(mapping, index);
 	if (xa_is_value(folio)) {
 		if (fgp_flags & FGP_ENTRY)
 			return folio;
-- 
2.39.0