linux-kernel - [PATCH] selftests: be sure to make khdr before other targets

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Message-ID: <20210915134554.19581-1-lizhijian@cn.fujitsu.com>
Date:   Wed, 15 Sep 2021 21:45:54 +0800
From:   Li Zhijian <lizhijian@...fujitsu.com>
To:     <shuah@...nel.org>, <linux-kselftest@...r.kernel.org>
CC:     <linux-kernel@...r.kernel.org>,
        Li Zhijian <lizhijian@...fujitsu.com>,
        Philip Li <philip.li@...el.com>,
        kernel test robot <lkp@...el.com>
Subject: [PATCH] selftests: be sure to make khdr before other targets

LKP/0Day reported some building errors about kvm, and errors message
are not always same:
- lib/x86_64/processor.c:1083:31: error: ‘KVM_CAP_NESTED_STATE’ undeclared
(first use in this function); did you mean ‘KVM_CAP_PIT_STATE2’?
- lib/test_util.c:189:30: error: ‘MAP_HUGE_16KB’ undeclared (first use
in this function); did you mean ‘MAP_HUGE_16GB’?

Although kvm relies on the khdr, they still be built in parallel when -j
is specified. In this case, it will cause compiling errors.

Here we mark target khdr as NOTPARALLEL to make it be always built
first.

CC: Philip Li <philip.li@...el.com>
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Li Zhijian <lizhijian@...fujitsu.com>
---
 tools/testing/selftests/lib.mk | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 7ee911355328..5074b01f2a29 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -48,6 +48,7 @@ ARCH		?= $(SUBARCH)
 # When local build is done, headers are installed in the default
 # INSTALL_HDR_PATH usr/include.
 .PHONY: khdr
+.NOTPARALLEL:
 khdr:
 ifndef KSFT_KHDR_INSTALL_DONE
 ifeq (1,$(DEFAULT_INSTALL_HDR_PATH))
-- 
2.33.0