From 8a7ed66aaf8ee56b0a6beee4d02e10af5a9e38b2 Mon Sep 17 00:00:00 2001
From: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Date: Fri, 21 Feb 2014 14:29:35 +0900
Subject: [PATCH] f2fs: introduce a radix_tree for the free_nid list

This patch introduces a radix tree for the list of free_nids, which enhances
the performance on free nid management.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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