linux-yocto: error if meta data not present

There are valid reasons to build repositories without meta
data present and there are times when this is an error. This
change adds sanity tests to the build process to detect missing
meta data and throw an informative error message.

Sanity checking is only triggered from recipes (linux-yocto)
that always require meta data to be present. Other recipes
are not impacted and can auto-generate meta data as required.

Without this change the build process suceeds, but incorrect
meta data will be used (with no user knowledge), which is not
the desired behaviour.

(From OE-Core rev: adf9f92e2f8f6cc3deba72a194ded85e160ad9e3)

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/kernel-yocto.bbclass

@@ -13,7 +13,10 @@ do_patch() {
 	fi
 
 	# simply ensures that a branch of the right name has been created
-	createme ${ARCH} ${kbranch} ${defconfig}
+	if [ -n "${YOCTO_KERNEL_META_DATA}" ]; then
+		createme_flags="--disable-meta-gen"
+	fi
+	createme ${createme_flags} ${ARCH} ${kbranch} ${defconfig}
 	if [ $? -ne 0 ]; then
 		echo "ERROR. Could not create ${kbranch}"
 		exit 1

meta/recipes-kernel/kern-tools/kern-tools-native_git.bb

@@ -4,7 +4,7 @@ LIC_FILES_CHKSUM = "file://git/tools/kgit;beginline=5;endline=9;md5=e2bf4415f3d8
 
 DEPENDS = "git-native guilt-native"
 
-SRCREV = "c5896a60acc61f8966cfee3bb241ff564610cea4"
+SRCREV = "ab49d8e48b7e66d1b4f924385d65d062d25e44f7"
 PR = r10
 PV = "0.1+git${SRCPV}"
 

meta/recipes-kernel/linux/linux-yocto_git.bb

@@ -22,7 +22,7 @@ SRCREV_machine_qemux86-64 = "b906f358fd404a1e74a961f25079274e0d933ee1"
 SRCREV_machine = "b906f358fd404a1e74a961f25079274e0d933ee1"
 SRCREV_meta = "ecab1e2bc12a8b0c4d064a00acc3260f6e8528c5"
 
-PR = "r17"
+PR = "r18"
 PV = "${LINUX_VERSION}+git${SRCPV}"
 SRCREV_FORMAT = "meta_machine"
 
@@ -36,6 +36,8 @@ KERNEL_FEATURES="features/netfilter"
 KERNEL_FEATURES_append_qemux86=" cfg/sound"
 KERNEL_FEATURES_append_qemux86-64=" cfg/sound"
 
+YOCTO_KERNEL_META_DATA=t
+
 # extra tasks
 addtask kernel_link_vmlinux after do_compile before do_install
 addtask validate_branches before do_patch after do_kernel_checkout