From: Felix Fietkau <nbd@nbd.name>
Date: Thu, 16 Mar 2017 08:33:18 +0000 (+0100)
Subject: kernel: speed up build system by getting rid of redundant work
X-Git-Tag: v18.06.0-rc1~3328
X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fopenwrt.git;a=commitdiff_plain;h=1f12a3daaaa8f3525741bef2bc2be7c5c6c77b50

kernel: speed up build system by getting rid of redundant work

KERNELRELEASE contains a $(shell) call which is evaluated over and over
again.
The call to checksyscalls.sh is unnecessary for LEDE and also takes a
few seconds to complete.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

diff --git a/include/kernel-defaults.mk b/include/kernel-defaults.mk
index 10bd67a571..1c3b428b16 100644
--- a/include/kernel-defaults.mk
+++ b/include/kernel-defaults.mk
@@ -23,7 +23,9 @@ KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
 	HOST_LOADLIBES="-L$(STAGING_DIR_HOST)/lib" \
 	CONFIG_SHELL="$(BASH)" \
 	$(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \
-	$(if $(PKG_BUILD_ID),LDFLAGS_MODULE=--build-id=0x$(PKG_BUILD_ID))
+	$(if $(PKG_BUILD_ID),LDFLAGS_MODULE=--build-id=0x$(PKG_BUILD_ID)) \
+	KERNELRELEASE=$(LINUX_VERSION) \
+	cmd_syscalls=
 
 ifdef CONFIG_STRIP_KERNEL_EXPORTS
   KERNEL_MAKEOPTS += \