fs/remap_range: Pass the file pointer to read_mapping_folio()

We have the struct file in generic_remap_file_range_prep() already;
we just need to pass it around instead of the inode.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Acked-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Tested-by: Mike Marshall <hubcap@omnibond.com> # orangefs
Tested-by: David Howells <dhowells@redhat.com> # afs

fs/remap_range.c

@@ -146,11 +146,11 @@ static int generic_remap_check_len(struct inode *inode_in,
 }
 
 /* Read a page's worth of file data into the page cache. */
-static struct folio *vfs_dedupe_get_folio(struct inode *inode, loff_t pos)
+static struct folio *vfs_dedupe_get_folio(struct file *file, loff_t pos)
 {
 	struct folio *folio;
 
-	folio = read_mapping_folio(inode->i_mapping, pos >> PAGE_SHIFT, NULL);
+	folio = read_mapping_folio(file->f_mapping, pos >> PAGE_SHIFT, file);
 	if (IS_ERR(folio))
 		return folio;
 	if (!folio_test_uptodate(folio)) {
@@ -187,8 +187,8 @@ static void vfs_unlock_two_folios(struct folio *folio1, struct folio *folio2)
  * Compare extents of two files to see if they are the same.
  * Caller must have locked both inodes to prevent write races.
  */
-static int vfs_dedupe_file_range_compare(struct inode *src, loff_t srcoff,
-					 struct inode *dest, loff_t dstoff,
+static int vfs_dedupe_file_range_compare(struct file *src, loff_t srcoff,
+					 struct file *dest, loff_t dstoff,
 					 loff_t len, bool *is_same)
 {
 	bool same = true;
@@ -224,8 +224,8 @@ static int vfs_dedupe_file_range_compare(struct inode *src, loff_t srcoff,
 		 * someone is invalidating pages on us and we lose.
 		 */
 		if (!folio_test_uptodate(src_folio) || !folio_test_uptodate(dst_folio) ||
-		    src_folio->mapping != src->i_mapping ||
-		    dst_folio->mapping != dest->i_mapping) {
+		    src_folio->mapping != src->f_mapping ||
+		    dst_folio->mapping != dest->f_mapping) {
 			same = false;
 			goto unlock;
 		}
@@ -333,8 +333,8 @@ int generic_remap_file_range_prep(struct file *file_in, loff_t pos_in,
 	if (remap_flags & REMAP_FILE_DEDUP) {
 		bool		is_same = false;
 
-		ret = vfs_dedupe_file_range_compare(inode_in, pos_in,
-				inode_out, pos_out, *len, &is_same);
+		ret = vfs_dedupe_file_range_compare(file_in, pos_in,
+				file_out, pos_out, *len, &is_same);
 		if (ret)
 			return ret;
 		if (!is_same)