udf: Fix some sign-conversion warnings

Fix some warnings that appear when compiling with -Wconversion.
A sub-optimal choice of variable type leads to warnings about
conversion in both directions between unsigned and signed.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Jan Kara <jack@suse.cz>

fs/udf/directory.c

@@ -52,7 +52,7 @@ struct fileIdentDesc *udf_fileident_read(struct inode *dir, loff_t *nf_pos,
 	}
 
 	if (fibh->eoffset == dir->i_sb->s_blocksize) {
-		int lextoffset = epos->offset;
+		uint32_t lextoffset = epos->offset;
 		unsigned char blocksize_bits = dir->i_sb->s_blocksize_bits;
 
 		if (udf_next_aext(dir, epos, eloc, elen, 1) !=
@@ -111,7 +111,7 @@ struct fileIdentDesc *udf_fileident_read(struct inode *dir, loff_t *nf_pos,
 		memcpy((uint8_t *)cfi, (uint8_t *)fi,
 		       sizeof(struct fileIdentDesc));
 	} else if (fibh->eoffset > dir->i_sb->s_blocksize) {
-		int lextoffset = epos->offset;
+		uint32_t lextoffset = epos->offset;
 
 		if (udf_next_aext(dir, epos, eloc, elen, 1) !=
 		    (EXT_RECORDED_ALLOCATED >> 30))

fs/udf/inode.c

@@ -480,7 +480,7 @@ static int udf_do_extend_file(struct inode *inode,
 	int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
 	struct super_block *sb = inode->i_sb;
 	struct kernel_lb_addr prealloc_loc = {};
-	int prealloc_len = 0;
+	uint32_t prealloc_len = 0;
 	struct udf_inode_info *iinfo;
 	int err;
 
@@ -1193,7 +1193,7 @@ int udf_setsize(struct inode *inode, loff_t newsize)
 {
 	int err;
 	struct udf_inode_info *iinfo;
-	int bsize = i_blocksize(inode);
+	unsigned int bsize = i_blocksize(inode);
 
 	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
 	      S_ISLNK(inode->i_mode)))