truncate: drop 'oldsize' truncate_pagecache() parameter

truncate_pagecache() doesn't care about old size since commit
cedabed49b39 ("vfs: Fix vmtruncate() regression").  Let's drop it.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index b6d15d3..062b792 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -172,7 +172,7 @@
 	loff_t isize = inode->i_size;
 
 	if (to > isize) {
-		truncate_pagecache(inode, to, isize);
+		truncate_pagecache(inode, isize);
 		if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
 			down_write(&iinfo->i_data_sem);
 			udf_clear_extent_cache(inode);