lttng-modules: Update to 2.0

This patch intended to integrate the lttng-modules 2.0 package
containing the kernel tracer modules.
LTTng-modules 2.0 is currently in pre-release (-pre11), so we
have to update it when official released.

lttng-2.0 supports lttng-modules extra builds, which don't need
any patches on Linux kernel vs the previous version of lttng.
As described in README of lttng-modules-2.0, so far, it has been
tested in the latest kernel on x86 32/64-bit, and powerpc 32-bit,
, build tested on ARM. So does yocto kernel, the related tests
on qemux86 and qemuppc has been validated and a build test on
qemuarm passed too with this patcheset.

(From OE-Core rev: b054921f7dd59519a896a4e1a5f40965d4abd87e)

Signed-off-by: Zumeng Chen <zumeng.chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-kernel/lttng-2.0/lttng-modules/lttng-modules-replace-KERNELDIR-with-KERNEL_SRC.patch

@@ -0,0 +1,41 @@
+Upstream-Status: Inappropriate [embedded specific]
+
+lttng-modules: replace KERNELDIR with KERNEL_SRC
+
+Since lttng-modules uses the default way of module.bbclass to
+build and install lttng-modules, we do this replacement for
+it as-is.
+
+Signed-off-by: Zumeng Chen <zumeng.chen@windriver.com>
+---
+ Makefile |    7 +++----
+ 1 files changed, 3 insertions(+), 4 deletions(-)
+
+diff --git a/Makefile b/Makefile
+index 5ac13d7..25caad5 100644
+--- a/Makefile
++++ b/Makefile
+@@ -38,17 +38,16 @@ obj-m += lib/
+ endif
+
+ else
+-	KERNELDIR ?= /lib/modules/$(shell uname -r)/build
+ 	PWD := $(shell pwd)
+ 	CFLAGS = $(EXTCFLAGS)
+
+ default:
+-	$(MAKE) -C $(KERNELDIR) M=$(PWD) modules
++	$(MAKE) -C $(KERNEL_SRC) M=$(PWD) modules
+
+ modules_install:
+-	$(MAKE) -C $(KERNELDIR) M=$(PWD) modules_install
++	$(MAKE) -C $(KERNEL_SRC) M=$(PWD) modules_install
+
+ clean:
+-	$(MAKE) -C $(KERNELDIR) M=$(PWD) clean
++	$(MAKE) -C $(KERNEL_SRC) M=$(PWD) clean
+
+ endif
+-- 
+1.7.5.4
+

meta/recipes-kernel/lttng-2.0/lttng-modules_2.0.pre11.bb

@@ -0,0 +1,27 @@
+SECTION = "devel"
+SUMMARY = "Linux Trace Toolkit KERNEL MODULE"
+DESCRIPTION = "The lttng-modules 2.0 package contains the kernel tracer modules"
+LICENSE = "LGPLv2.1 & GPLv2"
+LIC_FILES_CHKSUM = "file://LICENSE;md5=1eb086682a7c65a45acd9bcdf6877b3e \
+                    file://gpl-2.0.txt;md5=751419260aa954499f7abaabaa882bbe \
+                    file://lgpl-2.1.txt;md5=243b725d71bb5df4a1e5920b344b86ad"
+
+DEPENDS = virtual/kernel
+
+inherit module
+
+SRCREV = "4d3e89e379fc66480d729abe8daa5c86eb585400"
+PV = "2.0.pre11+git${SRCREV}"
+PR = "r0"
+
+SRC_URI = "git://git.lttng.org/lttng-modules.git;protocol=git \
+           file://lttng-modules-replace-KERNELDIR-with-KERNEL_SRC.patch"
+
+export INSTALL_MOD_DIR="kernel/lttng-modules"
+
+S = "${WORKDIR}/git"
+
+# Due to liburcu not building for MIPS currently this recipe needs to
+# be limited also.
+# So here let us first suppport x86/arm/powerpc platforms now.
+COMPATIBLE_HOST = '(x86_64.*|i.86.*|arm.*|powerpc.*)-linux'