From 50d356311a28a77c2c30c9928b62484b67461f0c Mon Sep 17 00:00:00 2001
From: John Baldwin <jhb@FreeBSD.org>
Date: Thu, 29 Oct 2009 15:13:36 +0000
Subject: [PATCH] MFC 197460: Remove unnecessary locking from attach().  This
 fixes a LOR between the acpi_ibm lock and the sysctl lock.

---
 sys/dev/acpi_support/acpi_ibm.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/sys/dev/acpi_support/acpi_ibm.c b/sys/dev/acpi_support/acpi_ibm.c
index 072c574acac4..25db9b0be961 100644
--- a/sys/dev/acpi_support/acpi_ibm.c
+++ b/sys/dev/acpi_support/acpi_ibm.c
@@ -356,8 +356,6 @@ acpi_ibm_attach(device_t dev)
 	}
 	sc->ec_handle = acpi_get_handle(sc->ec_dev);
 
-	ACPI_SERIAL_BEGIN(ibm);
-
 	/* Get the sysctl tree */
 	sc->sysctl_ctx = device_get_sysctl_ctx(dev);
 	sc->sysctl_tree = device_get_sysctl_tree(dev);
@@ -404,8 +402,6 @@ acpi_ibm_attach(device_t dev)
 		    "Thermal zones");
 	}
 
-	ACPI_SERIAL_END(ibm);
-
 	/* Handle notifies */
 	AcpiInstallNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY,
 	    acpi_ibm_notify, dev);