From 2034c19ce8f8503aa14cb1e763fbfe60316aaa8e Mon Sep 17 00:00:00 2001
From: Hillf Danton <dhillf@gmail.com>
Date: Tue, 30 Nov 2010 16:18:17 -0800
Subject: [PATCH] [SCSI] libfc: tune fc_exch_em_alloc() to be O(2)

For allocating new exch from pool,  scanning for free slot in exch
array fluctuates when exch pool is close to exhaustion.

The fluctuation is smoothed, and the scan looks to be O(2).

Signed-off-by: Hillf Danton <dhillf@gmail.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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