From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Fri, 7 Oct 2016 14:55:16 +0000 (-0400)
Subject: Fix: i2c: support kernels < 3.15
X-Git-Tag: v2.9.0-rc1~1
X-Git-Url: http://git.lttng.org/?p=lttng-modules.git;a=commitdiff_plain;h=a918229e4ebb0e6e415b37472c689ec4c6a736e8

Fix: i2c: support kernels < 3.15

i2c instrumentation has only been added in kernel 3.15.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/probes/Kbuild b/probes/Kbuild
index bd35bd75..2afb6dd2 100644
--- a/probes/Kbuild
+++ b/probes/Kbuild
@@ -5,7 +5,6 @@ include $(TOP_LTTNG_MODULES_DIR)/Makefile.ABI.workarounds
 ccflags-y += -I$(TOP_LTTNG_MODULES_DIR)
 
 obj-$(CONFIG_LTTNG) += lttng-probe-sched.o
-obj-$(CONFIG_LTTNG) += lttng-probe-i2c.o
 obj-$(CONFIG_LTTNG) += lttng-probe-irq.o
 obj-$(CONFIG_LTTNG) += lttng-probe-timer.o
 obj-$(CONFIG_LTTNG) += lttng-probe-kmem.o
@@ -13,6 +12,11 @@ obj-$(CONFIG_LTTNG) += lttng-probe-module.o
 obj-$(CONFIG_LTTNG) += lttng-probe-power.o
 obj-$(CONFIG_LTTNG) += lttng-probe-statedump.o
 
+i2c_dep = $(srctree)/include/trace/events/i2c.h
+ifneq ($(wildcard $(i2c_dep)),)
+  obj-$(CONFIG_LTTNG) += lttng-probe-i2c.o
+endif
+
 ifneq ($(CONFIG_KVM),)
   obj-$(CONFIG_LTTNG) += lttng-probe-kvm.o
   ifneq ($(CONFIG_X86),)