btrfs: rename __get_extent_map() and pass btrfs_inode

The double underscore naming scheme does not apply here, there's only
only get_extent_map(). As the definition is changed also pass the struct
btrfs_inode.

Reviewed-by: Johannes Thumshirn <[email protected]>
Reviewed-by: Anand Jain <[email protected]>
Signed-off-by: David Sterba <[email protected]>

Author: kdave

fs/btrfs/extent_io.c

@@ -896,9 +896,9 @@ void clear_folio_extent_mapped(struct folio *folio)
 	folio_detach_private(folio);
 }
 
-static struct extent_map *__get_extent_map(struct inode *inode,
-					   struct folio *folio, u64 start,
-					   u64 len, struct extent_map **em_cached)
+static struct extent_map *get_extent_map(struct btrfs_inode *inode,
+					 struct folio *folio, u64 start,
+					 u64 len, struct extent_map **em_cached)
 {
 	struct extent_map *em;
 	struct extent_state *cached_state = NULL;
@@ -917,14 +917,14 @@ static struct extent_map *__get_extent_map(struct inode *inode,
 		*em_cached = NULL;
 	}
 
-	btrfs_lock_and_flush_ordered_range(BTRFS_I(inode), start, start + len - 1, &cached_state);
-	em = btrfs_get_extent(BTRFS_I(inode), folio, start, len);
+	btrfs_lock_and_flush_ordered_range(inode, start, start + len - 1, &cached_state);
+	em = btrfs_get_extent(inode, folio, start, len);
 	if (!IS_ERR(em)) {
 		BUG_ON(*em_cached);
 		refcount_inc(&em->refs);
 		*em_cached = em;
 	}
-	unlock_extent(&BTRFS_I(inode)->io_tree, start, start + len - 1, &cached_state);
+	unlock_extent(&inode->io_tree, start, start + len - 1, &cached_state);
 
 	return em;
 }
@@ -980,8 +980,7 @@ static int btrfs_do_readpage(struct folio *folio, struct extent_map **em_cached,
 			end_folio_read(folio, true, cur, iosize);
 			break;
 		}
-		em = __get_extent_map(inode, folio, cur, end - cur + 1,
-				      em_cached);
+		em = get_extent_map(BTRFS_I(inode), folio, cur, end - cur + 1, em_cached);
 		if (IS_ERR(em)) {
 			end_folio_read(folio, false, cur, end + 1 - cur);
 			return PTR_ERR(em);