ext4: delete unused variables

index 3dcbf36..b494382 100644
@@ -912,7 +912,6 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode,
        struct page *pagep[2] = {NULL, NULL};
        handle_t *handle;
        ext4_lblk_t orig_blk_offset;
-       long long offs = orig_page_offset << PAGE_CACHE_SHIFT;
        unsigned long blocksize = orig_inode->i_sb->s_blocksize;
        unsigned int w_flags = 0;
        unsigned int tmp_data_size, data_size, replaced_size;

@@ -940,7 +939,6 @@ again:
        orig_blk_offset = orig_page_offset * blocks_per_page +
                data_offset_in_page;
 
-       offs = (long long)orig_blk_offset << orig_inode->i_blkbits;
 
        /* Calculate data_size */
        if ((orig_blk_offset + block_len_in_page - 1) ==

index 6ed4df2..707095b 100644
@@ -1556,11 +1556,10 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
        int reserved_gdb = ext4_bg_has_super(sb, input->group) ?
                le16_to_cpu(es->s_reserved_gdt_blocks) : 0;
        struct inode *inode = NULL;
-       int gdb_off, gdb_num;
+       int gdb_off;
        int err;
        __u16 bg_flags = 0;
 
-       gdb_num = input->group / EXT4_DESC_PER_BLOCK(sb);
        gdb_off = input->group % EXT4_DESC_PER_BLOCK(sb);
 
        if (gdb_off == 0 && !EXT4_HAS_RO_COMPAT_FEATURE(sb,

index eb52a7b..54701fc 100644
@@ -1924,7 +1924,6 @@ static int ext4_fill_flex_info(struct super_block *sb)
        struct ext4_sb_info *sbi = EXT4_SB(sb);
        struct ext4_group_desc *gdp = NULL;
        ext4_group_t flex_group;
-       unsigned int groups_per_flex = 0;
        int i, err;
 
        sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex;

@@ -1932,7 +1931,6 @@ static int ext4_fill_flex_info(struct super_block *sb)
                sbi->s_log_groups_per_flex = 0;
                return 1;
        }
-       groups_per_flex = 1U << sbi->s_log_groups_per_flex;
 
        err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count);
        if (err)