From edb5ac8993e25143f6af1ab143843a65c52e2a15 Mon Sep 17 00:00:00 2001
From: Yongqiang Yang <xiaoqiangnk@gmail.com>
Date: Mon, 31 Oct 2011 18:04:38 -0400
Subject: [PATCH] ext4: let ext4_discard_partial_buffers handle unaligned range
 correctly

As comment says, we should handle unaligned range rather than aligned
one.  This fixes a bug found by running xfstests #91.

Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
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