ngroup 2706 fs/ext4/ext4.h ext4_group_t ngroup); ngroup 2343 fs/ext4/super.c int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) ngroup 2352 fs/ext4/super.c size = ext4_flex_group(sbi, ngroup - 1) + 1;