linux-kernel - [PATCH v3 3/3] mm/filemap: remove read_cache_page

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Message-ID: <a5ffadf18dca846d6f8086b29366288e794a24b6.1768017091.git.wqu@suse.com>
Date: Sat, 10 Jan 2026 14:26:21 +1030
From: Qu Wenruo <wqu@...e.com>
To: linux-btrfs@...r.kernel.org,
	linux-mm@...ck.org,
	linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 3/3] mm/filemap: remove read_cache_page_gfp()

The last user of this function is btrfs, which has migrated to use
bdev_rw_virt().

So there is no need to keep that function.

Signed-off-by: Qu Wenruo <wqu@...e.com>
---
 include/linux/pagemap.h |  2 --
 mm/filemap.c            | 23 -----------------------
 2 files changed, 25 deletions(-)

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 31a848485ad9..2efbf6c55a96 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -1002,8 +1002,6 @@ struct folio *mapping_read_folio_gfp(struct address_space *, pgoff_t index,
 		gfp_t flags);
 struct page *read_cache_page(struct address_space *, pgoff_t index,
 		filler_t *filler, struct file *file);
-extern struct page * read_cache_page_gfp(struct address_space *mapping,
-				pgoff_t index, gfp_t gfp_mask);
 
 static inline struct page *read_mapping_page(struct address_space *mapping,
 				pgoff_t index, struct file *file)
diff --git a/mm/filemap.c b/mm/filemap.c
index ebd75684cb0a..cd167aa45934 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -4173,29 +4173,6 @@ struct page *read_cache_page(struct address_space *mapping,
 }
 EXPORT_SYMBOL(read_cache_page);
 
-/**
- * read_cache_page_gfp - read into page cache, using specified page allocation flags.
- * @mapping:	the page's address_space
- * @index:	the page index
- * @gfp:	the page allocator flags to use if allocating
- *
- * This is the same as "read_mapping_page(mapping, index, NULL)", but with
- * any new page allocations done using the specified allocation flags.
- *
- * If the page does not get brought uptodate, return -EIO.
- *
- * The function expects mapping->invalidate_lock to be already held.
- *
- * Return: up to date page on success, ERR_PTR() on failure.
- */
-struct page *read_cache_page_gfp(struct address_space *mapping,
-				pgoff_t index,
-				gfp_t gfp)
-{
-	return do_read_cache_page(mapping, index, NULL, NULL, gfp);
-}
-EXPORT_SYMBOL(read_cache_page_gfp);
-
 /*
  * Warn about a page cache invalidation failure during a direct I/O write.
  */
-- 
2.52.0