[lttng-dev] [PATCH lttng-modules] lttng-modules: fix build and load against linux-2.6.33.x

[Samuel Martin]

* lttng-event.h declared but did not implement lttng_add_perf_counter_to_ctx
  on kernel >=2.6.33, the implementation was in lttng-context-perf-counters.c,
  which was only included for kernel >=2.6.34.
  This prevented the module from being loaded.

* on kernel 2.6.33.x, lttng-context-perf-counters.c complains about implicit
  declaration for {get,put}_online_cpus and {,un}register_cpu_notifier; so
  fix header inclusion.

Signed-off-by: Samuel Martin <smartin at aldebaran-robotics.com>
---
 Makefile                      | 2 +-
 lttng-context-perf-counters.c | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 2da7298..66d94bc 100644
--- a/Makefile
+++ b/Makefile
@@ -33,7 +33,7 @@ endif
 ifneq ($(CONFIG_PERF_EVENTS),)
 lttng-tracer-objs += $(shell \
 	if [ $(VERSION) -ge 3 \
-		-o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -ge 6 -a $(SUBLEVEL) -ge 34 \) ] ; then \
+		-o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -ge 6 -a $(SUBLEVEL) -ge 33 \) ] ; then \
 		echo "lttng-context-perf-counters.o" ; fi;)
 endif
 
diff --git a/lttng-context-perf-counters.c b/lttng-context-perf-counters.c
index b97b40b..8c4a48a 100644
--- a/lttng-context-perf-counters.c
+++ b/lttng-context-perf-counters.c
@@ -25,6 +25,7 @@
 #include <linux/perf_event.h>
 #include <linux/list.h>
 #include <linux/string.h>
+#include <linux/cpu.h>
 #include "lttng-events.h"
 #include "wrapper/ringbuffer/frontend_types.h"
 #include "wrapper/vmalloc.h"
-- 
1.8.3.1