From: Kris Van Hees <kris.van.hees@oracle.com>
Date: Wed, 20 Jul 2011 07:06:47 +0000 (-0400)
Subject: dtrace: added CONFIG_DT_DEBUG_MUTEX option
X-Git-Tag: v4.1.12-92~313^2~176
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=9ca929d29b49963922963c9e39270354b35e17eb;p=users%2Fjedix%2Flinux-maple.git

dtrace: added CONFIG_DT_DEBUG_MUTEX option

This option enables printing all locations where a mutex is locked
and unlocked.

Implemented aggregations using the idr mechanism rather than the
Solaris-based 1-byte allocation technique to get unique IDs.
Various cleanup and small changes.

Signed-off-by: Kris Van Hees <kris.van.hees@oracle.com>
---

diff --git a/kernel/dtrace/Kconfig b/kernel/dtrace/Kconfig
index ecd57ff762b48..b920ff3b7eb12 100644
--- a/kernel/dtrace/Kconfig
+++ b/kernel/dtrace/Kconfig
@@ -73,6 +73,18 @@ config DT_DEBUG
 	  internal checks within the DTrace core.  It also enables all the
 	  assertions within the DTrace code.
 
+if DT_DEBUG
+
+config DT_DEBUG_MUTEX
+	bool "DTrace mutex debugging"
+	default n
+	help
+	  This controls the use of DTrace specific wrappers to output debug
+	  messages whenever a mutex is locked or unlocked within the DTrace
+	  code (core and providers).
+
+endif	# DT_DEBUG
+
 endif	# DT_CORE
 
 endif   #DTRACE