udf: use crc_itu_t from lib instead of udf_crc

As pointed out by Sergey Vlasov, UDF implements its own version of
the CRC ITU-T V.41.  Convert it to use the one in the library.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Cc: Sergey Vlasov <vsu@altlinux.ru>
Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 6 insertions, 5 deletions

diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 6e151f170c08..6e74b117aaf0 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -37,6 +37,7 @@
 #include <linux/buffer_head.h>
 #include <linux/writeback.h>
 #include <linux/slab.h>
+#include <linux/crc-itu-t.h>
 
 #include "udf_i.h"
 #include "udf_sb.h"
@@ -1419,9 +1420,9 @@ static int udf_update_inode(struct inode *inode, int do_sync)
                                                 iinfo->i_location.
                                                         logicalBlockNum);
                 use->descTag.descCRCLength = cpu_to_le16(crclen);
-                use->descTag.descCRC = cpu_to_le16(udf_crc((char *)use +
-                                                           sizeof(tag), crclen,
-                                                           0));
+                use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use +
+                                                           sizeof(tag),
+                                                           crclen));
                 use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
 
                 mark_buffer_dirty(bh);
@@ -1584,8 +1585,8 @@ static int udf_update_inode(struct inode *inode, int do_sync)
         crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc -
                                                                 sizeof(tag);
         fe->descTag.descCRCLength = cpu_to_le16(crclen);
-        fe->descTag.descCRC = cpu_to_le16(udf_crc((char *)fe + sizeof(tag),
-                                                  crclen, 0));
+        fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(tag),
+                                                  crclen));
         fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
 
         /* write the data blocks */