udf: Mark aops implementation static

Mark functions implementing aops static since they are not needed
outside of inode.c anymore.

Reviewed-by: Christoph Hellwig <[e-mail]>
Signed-off-by: Jan Kara <[e-mail]>

fs/udf/inode.c

···
 	return 0;
 }
 
-int udf_writepages(struct address_space *mapping, struct writeback_control *wbc)
+static int udf_writepages(struct address_space *mapping,
+			  struct writeback_control *wbc)
 {
 	struct inode *inode = mapping->host;
 	struct udf_inode_info *iinfo = UDF_I(inode);
···
 	return write_cache_pages(mapping, wbc, udf_adinicb_writepage, NULL);
 }
 
-int udf_read_folio(struct file *file, struct folio *folio)
+static int udf_read_folio(struct file *file, struct folio *folio)
 {
 	struct udf_inode_info *iinfo = UDF_I(file_inode(file));
 
···
 	mpage_readahead(rac, udf_get_block);
 }
 
-int udf_write_begin(struct file *file, struct address_space *mapping,
-			loff_t pos, unsigned len,
-			struct page **pagep, void **fsdata)
+static int udf_write_begin(struct file *file, struct address_space *mapping,
+			   loff_t pos, unsigned len,
+			   struct page **pagep, void **fsdata)
 {
 	struct udf_inode_info *iinfo = UDF_I(file_inode(file));
 	struct page *page;
···
 	return 0;
 }
 
-int udf_write_end(struct file *file, struct address_space *mapping,
-		  loff_t pos, unsigned len, unsigned copied,
-		  struct page *page, void *fsdata)
+static int udf_write_end(struct file *file, struct address_space *mapping,
+			 loff_t pos, unsigned len, unsigned copied,
+			 struct page *page, void *fsdata)
 {
 	struct inode *inode = file_inode(file);
 	loff_t last_pos;
···
 	return copied;
 }
 
-ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
+static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 {
 	struct file *file = iocb->ki_filp;
 	struct address_space *mapping = file->f_mapping;

fs/udf/udfdecl.h

···
 extern int udf_setsize(struct inode *, loff_t);
 extern void udf_evict_inode(struct inode *);
 extern int udf_write_inode(struct inode *, struct writeback_control *wbc);
-int udf_read_folio(struct file *file, struct folio *folio);
-int udf_writepages(struct address_space *mapping, struct writeback_control *wbc);
-int udf_write_begin(struct file *file, struct address_space *mapping,
-			loff_t pos, unsigned len,
-			struct page **pagep, void **fsdata);
-int udf_write_end(struct file *file, struct address_space *mapping,
-		  loff_t pos, unsigned len, unsigned copied,
-		  struct page *page, void *fsdata);
-ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter);
 extern int8_t inode_bmap(struct inode *, sector_t, struct extent_position *,
 			 struct kernel_lb_addr *, uint32_t *, sector_t *);
 int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);