ext4_bg_num_gdb
extern unsigned long ext4_bg_num_gdb(struct super_block *sb,
len = ext4_bg_num_gdb(sb, agno);
overhead = ext4_bg_num_gdb(sb, group);
if (!err && reserved_gdb && ext4_bg_num_gdb(sb, group))
gdblocks = ext4_bg_num_gdb(sb, group);
ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0);
return (has_super + ext4_bg_num_gdb(sb, grp) +
j = ext4_bg_num_gdb(sb, grp);