From: Tao Ma <tao.ma@oracle.com>
Date: Thu, 8 Apr 2010 08:33:02 +0000 (+0800)
Subject: ocfs2: make ocfs2_adjust_resv_from_alloc simple.
X-Git-Tag: v2.6.35-rc1~469^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b065556a7d1a9205403db77a318a5c5aa530e701;p=pandora-kernel.git

ocfs2: make ocfs2_adjust_resv_from_alloc simple.

When we allocate some bits from the reservation, we always
allocate from the r_start(see ocfs2_resmap_resv_bits).
So there should be no reason to check between r_start
and start. And I don't think we will change this behaviour
later by allocating from some bits after r_start.  Why not make
ocfs2_adjust_resv_from_alloc simple for now?

The only chance we have to adjust the reservation is when we haven't
reached the end. With this patch, the function is more readable.

Note:
btw, this patch also fixes an original bug in the function
which I haven't found before.
	if (end < ocfs2_resv_end(resv))
		rhs = end - ocfs2_resv_end(resv);
This code is of course buggy. ;)

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Acked-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
---

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