f2fs

	}

	sbi->readdir_ra = true;
}

static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
{
	struct f2fs_sb_info *sbi;
	struct f2fs_super_block *raw_super;
	struct inode *root;
	int err;
	bool skip_recovery = false, need_fsck = false;
	char *options = NULL;
	int recovery, i, valid_super_block;
	struct curseg_info *seg_i;
	int retry_cnt = 1;
#ifdef CONFIG_QUOTA
	bool quota_enabled = false;
#endif

try_onemore:
	err = -EINVAL;
	raw_super = NULL;
	valid_super_block = -1;
	recovery = 0;

	/* allocate memory for f2fs-specific super block info */
	sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
	if (!sbi)
		return -ENOMEM;

	sbi->sb = sb;

	/* initialize locks within allocated memory */
	init_f2fs_rwsem(&sbi->gc_lock);
	mutex_init(&sbi->writepages);
	init_f2fs_rwsem(&sbi->cp_global_sem);
	init_f2fs_rwsem(&sbi->node_write);
	init_f2fs_rwsem(&sbi->node_change);
	spin_lock_init(&sbi->stat_lock);

	}

	/*
	 * This is to avoid a deadlock condition like below.
	 * writeback_single_inode(inode)
	 *  - f2fs_write_data_page
	 *    - f2fs_gc -> iput -> evict
	 *       - inode_wait_for_writeback(inode)
	 */
	if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
		if (!inode->i_nlink && !is_bad_inode(inode)) {
			/* to avoid evict_inode call simultaneously */
			atomic_inc(&inode->i_count);
			spin_unlock(&inode->i_lock);

			/* should remain fi->extent_tree for writepage */
			f2fs_destroy_extent_node(inode);

			sb_start_intwrite(inode->i_sb);
			f2fs_i_size_write(inode, 0);

			f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
					inode, NULL, 0, DATA);
			truncate_inode_pages_final(inode->i_mapping);

			if (F2FS_HAS_BLOCKS(inode))
				f2fs_truncate(inode);

			sb_end_intwrite(inode->i_sb);

			spin_lock(&inode->i_lock);
			atomic_dec(&inode->i_count);
		}
		trace_f2fs_drop_inode(inode, 0);
		return 0;
	}
	ret = generic_drop_inode(inode);
	if (!ret)
		ret = fscrypt_drop_inode(inode);
	trace_f2fs_drop_inode(inode, ret);

static int f2fs_write_data_page(struct page *page,
					struct writeback_control *wbc)
{
#ifdef CONFIG_F2FS_FS_COMPRESSION
	struct inode *inode = page->mapping->host;

	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
		goto out;

	if (f2fs_compressed_file(inode)) {
		if (f2fs_is_compressed_cluster(inode, page->index)) {
			redirty_page_for_writepage(wbc, page);
			return AOP_WRITEPAGE_ACTIVATE;
		}
	}
out:
#endif

	return f2fs_write_single_data_page(page, NULL, NULL, NULL,
						wbc, FS_DATA_IO, 0, true);
}