From 67ca141567519a6b0ec81850a7b6569b6d8c2b52 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Sun, 3 Jun 2012 19:43:44 +0000
Subject: [PATCH] powerpc/iommu: Reduce spinlock coverage in iommu_free

This patch moves tce_free outside of the lock in iommu_free.

Some performance numbers were obtained with a Chelsio T3 adapter on
two POWER7 boxes, running a 100 session TCP round robin test.

Performance improved 25% with this patch applied.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
Reading git-format-patch failed