[OE-core] [PATCH] kernel-devicetree: build DTBs in parallel

[Dan Dedrick]

When building more than one device tree it's inefficient to serially
build them in multiple make calls. It's much faster and efficient to
build them in one call where they can run in parallel.

Signed-off-by: Dan Dedrick <ddedrick at lexmark.com>
---
 meta/classes/kernel-devicetree.bbclass | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/meta/classes/kernel-devicetree.bbclass b/meta/classes/kernel-devicetree.bbclass
index 867b776aa7..83270c4511 100644
--- a/meta/classes/kernel-devicetree.bbclass
+++ b/meta/classes/kernel-devicetree.bbclass
@@ -50,10 +50,14 @@ do_configure_append() {
 }
 
 do_compile_append() {
+	alldtb=""
 	for dtbf in ${KERNEL_DEVICETREE}; do
 		dtb=`normalize_dtb "$dtbf"`
-		oe_runmake $dtb
+		alldtb="${alldtb} ${dtb}"
 	done
+	if [ -n "${alldtb}" ]; then
+		oe_runmake ${alldtb}
+	fi
 }
 
 do_install_append() {
-- 
2.17.1