From a0186bcf7c21907c78ab2b4bc50f3fb2b5047806 Mon Sep 17 00:00:00 2001
From: Lv Zheng <lv.zheng@intel.com>
Date: Wed, 5 Aug 2015 16:23:57 +0800
Subject: [PATCH] ACPI / sysfs: Add support to allow leading "\" missing in
 trace_method_name.

Since _SB.PCI0 can be used as relative path from root and can be easily
converted into internal trace_method_name format, we allow users to specify
trace_method_name using relative paths from root.
Note this is useful for grub2 for which users failed to pass "\" from the
grub configuration file.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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