ext4: remove redundundant "(char *) bh->b_data" casts

The b_data field of the buffer_head is already a char *, so there's no
point casting it to a char *.
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

fs/ext4/resize.c

@@ -1145,7 +1145,7 @@ static int ext4_setup_new_descs(handle_t *handle, struct super_block *sb,
 		 */
 		gdb_bh = sbi->s_group_desc[gdb_num];
 		/* Update group descriptor block for new group */
-		gdp = (struct ext4_group_desc *)((char *)gdb_bh->b_data +
+		gdp = (struct ext4_group_desc *)(gdb_bh->b_data +
 						 gdb_off * EXT4_DESC_SIZE(sb));
 
 		memset(gdp, 0, EXT4_DESC_SIZE(sb));

fs/ext4/super.c

@@ -3126,7 +3126,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	 * Note: s_es must be initialized as soon as possible because
 	 *       some ext4 macro-instructions depend on its value
 	 */
-	es = (struct ext4_super_block *) (((char *)bh->b_data) + offset);
+	es = (struct ext4_super_block *) (bh->b_data + offset);
 	sbi->s_es = es;
 	sb->s_magic = le16_to_cpu(es->s_magic);
 	if (sb->s_magic != EXT4_SUPER_MAGIC)
@@ -3335,7 +3335,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 			       "Can't read superblock on 2nd try");
 			goto failed_mount;
 		}
-		es = (struct ext4_super_block *)(((char *)bh->b_data) + offset);
+		es = (struct ext4_super_block *)(bh->b_data + offset);
 		sbi->s_es = es;
 		if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) {
 			ext4_msg(sb, KERN_ERR,
@@ -3976,7 +3976,7 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb,
 		goto out_bdev;
 	}
 
-	es = (struct ext4_super_block *) (((char *)bh->b_data) + offset);
+	es = (struct ext4_super_block *) (bh->b_data + offset);
 	if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) ||
 	    !(le32_to_cpu(es->s_feature_incompat) &
 	      EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) {