[PATCH v3 12/12] selftests/nolibc: speed up some targets with multiple jobs

[Zhangjin Wu]

The sysroot install and kernel build targets are time cost, let's use
-j<N> to parallelize them with multiple jobs.

Signed-off-by: Zhangjin Wu <falcon@xxxxxxxxxxx>
---
 tools/testing/selftests/nolibc/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/nolibc/Makefile b/tools/testing/selftests/nolibc/Makefile
index ad2538ec5eb0..1b45c22f9a94 100644
--- a/tools/testing/selftests/nolibc/Makefile
+++ b/tools/testing/selftests/nolibc/Makefile
@@ -171,7 +171,7 @@ PHONY = sysroot/$(ARCH)/include
 sysroot/$(ARCH)/include:
 	$(Q)rm -rf sysroot/$(ARCH) sysroot/sysroot
 	$(QUIET_MKDIR)mkdir -p sysroot
-	$(Q)$(MAKE) -C ../../../include/nolibc ARCH=$(ARCH) OUTPUT=$(CURDIR)/sysroot/ headers_standalone
+	$(Q)$(MAKE) -j$$(nproc) -C ../../../include/nolibc ARCH=$(ARCH) OUTPUT=$(CURDIR)/sysroot/ headers_standalone
 	$(Q)mv sysroot/sysroot sysroot/$(ARCH)
 
 ifneq ($(NOLIBC_SYSROOT),0)
@@ -211,7 +211,7 @@ initramfs: nolibc-test
 	$(Q)cp nolibc-test initramfs/init
 
 # common macros for kernel targets
-MAKE_KERNEL   = $(MAKE) -C $(srctree) ARCH=$(ARCH) CC=$(CC) CROSS_COMPILE=$(CROSS_COMPILE)
+MAKE_KERNEL   = $(MAKE) -j$$(nproc) -C $(srctree) ARCH=$(ARCH) CC=$(CC) CROSS_COMPILE=$(CROSS_COMPILE)
 KERNEL_CONFIG = $(objtree)/.config
 KERNEL_IMAGE  = $(objtree)/$(IMAGE)
 
-- 
2.25.1