[OE-core] [PATCH] kernel-yocto.bbclass: Force do_diffconfig depends to ${PN}

[Nathan Rossi]

Commit 07e59b5ff659bde6e6a60c4781c0a2deb406c667 added the task
dependency of 'virtual/kernel:do_kernel_configme' for the do_diffconfig
task. This dependency is only valid for linux recipes that inherit
kernel-yocto (e.g. linux-yocto), however due to virtual/kernel being a
virtual dependency it may not be providing a kernel which inherits
kernel-yocto in which case the do_kernel_configme task might not exist.

In the case where virtual/kernel is provided by a non kernel-yocto
recipe an error is thrown in relation to the dependency, e.g.

	ERROR: Task do_diffconfig in linux-yocto-tiny_3.8.bb depends
	upon non-existent task do_kernel_configme in linux.bb

Changing the dependency to use '${PN}:do_kernel_configme' forces the
dependency to only depend on the recipe which inherits
kernel-yocto.bbclass.

Signed-off-by: Nathan Rossi <nathan.rossi at xilinx.com>
---
This effects the linux-xlnx recipe in meta-xilinx, causing the above error to be
shown when building the linux-xlnx recipe with PREFERRED_PROVIDER_virtual/kernel
 = "linux-xlnx".

I am not sure if this change is entirely correct, there may be a reason for the
dependence on virtual/kernel that I am not aware of, In which case I have cc'd
all parties involved in the commit which added this dependency.

I did however do a test of the diffconfig feature with this dependency change
in place, no regressions are apparent with the linux-yocto recipe.
---
 meta/classes/kernel-yocto.bbclass |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meta/classes/kernel-yocto.bbclass b/meta/classes/kernel-yocto.bbclass
index fab5d4c..ad80621 100644
--- a/meta/classes/kernel-yocto.bbclass
+++ b/meta/classes/kernel-yocto.bbclass
@@ -412,4 +412,4 @@ OE_TERMINAL_EXPORTS += "GUILT_BASE KBUILD_OUTPUT"
 GUILT_BASE = "meta"
 KBUILD_OUTPUT = "${B}"
 
-do_diffconfig[depends] += "virtual/kernel:do_kernel_configme"
+do_diffconfig[depends] += "${PN}:do_kernel_configme"
-- 
1.7.9.5