From 797f4277113bff142b6c64a55abaef64d7d67d5c Mon Sep 17 00:00:00 2001
From: Miao Xie <miaox@cn.fujitsu.com>
Date: Wed, 28 Nov 2012 10:28:07 +0000
Subject: [PATCH] Btrfs: use existing align macros in btrfs_allocate()

The kernel developers have implemented some often-used align macros, we should
use them instead of the complex code.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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