kernel-yocto: Only override CONFIG_LOCALVERSION if LINUX_VERSION_EXTENSION is set

CONFIG_LOCALVERSION may already be set in a defconfig or config fragment
and this should not be unconditionally overridden.

(From OE-Core rev: 613c43f910cbdf5e03ef3d5bbf92de69082a30c9)

Signed-off-by: Paul Barker <pbarker@konsulko.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/meta/classes/kernel-yocto.bbclass b/meta/classes/kernel-yocto.bbclass
index 9a4d2864eb..e8a9b1f18e 100644
--- a/meta/classes/kernel-yocto.bbclass
+++ b/meta/classes/kernel-yocto.bbclass
@@ -359,8 +359,10 @@ do_kernel_configme() {
                 bbfatal_log "Could not configure ${KMACHINE}-${LINUX_KERNEL_TYPE}"
         fi
 
-        echo "# Global settings from linux recipe" >> ${B}/.config
-        echo "CONFIG_LOCALVERSION="\"${LINUX_VERSION_EXTENSION}\" >> ${B}/.config
+        if [ ! -z "${LINUX_VERSION_EXTENSION}" ]; then
+                echo "# Global settings from linux recipe" >> ${B}/.config
+                echo "CONFIG_LOCALVERSION="\"${LINUX_VERSION_EXTENSION}\" >> ${B}/.config
+        fi
 }
 
 addtask kernel_configme before do_configure after do_patch