f2fs_kvmalloc
return f2fs_kvmalloc(sbi, size, flags | __GFP_ZERO);
free_i->free_segmap = f2fs_kvmalloc(sbi, bitmap_size, GFP_KERNEL);
free_i->free_secmap = f2fs_kvmalloc(sbi, sec_bitmap_size, GFP_KERNEL);