From 8ddd278d6b01987748d46c8ddcd1f25d4aec244e Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Sat, 3 Dec 2011 15:46:25 +0100
Subject: [PATCH] compat-wireless deactivate mac80211 tracing for old kernels

Activating tracing on kernel <= 2.6.32 causes build errors.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
 config.mk                                    |  4 ++
 patches/44-deactivate-mac80211-tracing.patch | 44 ++++++++++++++++++++
 2 files changed, 48 insertions(+)
 create mode 100644 patches/44-deactivate-mac80211-tracing.patch

diff --git a/config.mk b/config.mk
index c8256b8b4084..f09d16d48c6f 100644
--- a/config.mk
+++ b/config.mk
@@ -162,6 +162,10 @@ endif #CONFIG_COMPAT_RHEL_6_0
 # Wireless subsystem stuff
 CONFIG_MAC80211=m
 
+ifndef CONFIG_COMPAT_KERNEL_2_6_33
+CONFIG_MAC80211_DRIVER_API_TRACER=y
+endif #CONFIG_COMPAT_KERNEL_2_6_33
+
 # CONFIG_MAC80211_DEBUGFS=y
 # CONFIG_MAC80211_NOINLINE=y
 # CONFIG_MAC80211_VERBOSE_DEBUG=y
diff --git a/patches/44-deactivate-mac80211-tracing.patch b/patches/44-deactivate-mac80211-tracing.patch
new file mode 100644
index 000000000000..feff5eb9a009
--- /dev/null
+++ b/patches/44-deactivate-mac80211-tracing.patch
@@ -0,0 +1,44 @@
+Do not activate the mac80211 tracing by default as it does not work with 
+kernel <= 2.6.32. Compat also includes include/trace/define_trace.h over
+include/trace/events/module.h which makes this not compiling any more.
+
+--- a/net/mac80211/Makefile
++++ b/net/mac80211/Makefile
+@@ -24,8 +24,7 @@ mac80211-y := \
+ 	util.o \
+ 	wme.o \
+ 	event.o \
+-	chan.o \
+-	driver-trace.o
++	chan.o
+ 
+ mac80211-$(CONFIG_MAC80211_LEDS) += led.o
+ mac80211-$(CONFIG_MAC80211_DEBUGFS) += \
+@@ -42,6 +41,7 @@ mac80211-$(CONFIG_MAC80211_MESH) += \
+ 
+ mac80211-$(CONFIG_PM) += pm.o
+ 
++mac80211-$(CONFIG_MAC80211_DRIVER_API_TRACER) += driver-trace.o
+ CFLAGS_driver-trace.o := -I$(src)
+ 
+ # objects for PID algorithm
+--- a/net/mac80211/driver-trace.h
++++ b/net/mac80211/driver-trace.h
+@@ -5,6 +5,17 @@
+ #include <net/mac80211.h>
+ #include "ieee80211_i.h"
+ 
++#if !defined(CONFIG_MAC80211_DRIVER_API_TRACER) || defined(__CHECKER__)
++#undef TRACE_EVENT
++#define TRACE_EVENT(name, proto, ...) \
++static inline void trace_ ## name(proto) {}
++#undef DECLARE_EVENT_CLASS
++#define DECLARE_EVENT_CLASS(...)
++#undef DEFINE_EVENT
++#define DEFINE_EVENT(evt_class, name, proto, ...) \
++static inline void trace_ ## name(proto) {}
++#endif
++
+ #undef TRACE_SYSTEM
+ #define TRACE_SYSTEM mac80211
+ 
-- 
2.30.2