From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Peter Xu <peterx@redhat.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Sasha Levin <sashal@kernel.org>,
kvm@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: [PATCH AUTOSEL 5.4 38/49] KVM: selftests: Fix build for evmcs.h
Date: Thu, 14 May 2020 14:52:59 -0400 [thread overview]
Message-ID: <20200514185311.20294-38-sashal@kernel.org> (raw)
In-Reply-To: <20200514185311.20294-1-sashal@kernel.org>
From: Peter Xu <peterx@redhat.com>
[ Upstream commit 8ffdaf9155ebe517cdec5edbcca19ba6e7ee9c3c ]
I got this error when building kvm selftests:
/usr/bin/ld: /home/xz/git/linux/tools/testing/selftests/kvm/libkvm.a(vmx.o):/home/xz/git/linux/tools/testing/selftests/kvm/include/evmcs.h:222: multiple definition of `current_evmcs'; /tmp/cco1G48P.o:/home/xz/git/linux/tools/testing/selftests/kvm/include/evmcs.h:222: first defined here
/usr/bin/ld: /home/xz/git/linux/tools/testing/selftests/kvm/libkvm.a(vmx.o):/home/xz/git/linux/tools/testing/selftests/kvm/include/evmcs.h:223: multiple definition of `current_vp_assist'; /tmp/cco1G48P.o:/home/xz/git/linux/tools/testing/selftests/kvm/include/evmcs.h:223: first defined here
I think it's because evmcs.h is included both in a test file and a lib file so
the structs have multiple declarations when linking. After all it's not a good
habit to declare structs in the header files.
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20200504220607.99627-1-peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/testing/selftests/kvm/include/evmcs.h | 4 ++--
tools/testing/selftests/kvm/lib/x86_64/vmx.c | 3 +++
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/kvm/include/evmcs.h b/tools/testing/selftests/kvm/include/evmcs.h
index 4912d23844bc6..e31ac9c5ead0c 100644
--- a/tools/testing/selftests/kvm/include/evmcs.h
+++ b/tools/testing/selftests/kvm/include/evmcs.h
@@ -217,8 +217,8 @@ struct hv_enlightened_vmcs {
#define HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_MASK \
(~((1ull << HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_SHIFT) - 1))
-struct hv_enlightened_vmcs *current_evmcs;
-struct hv_vp_assist_page *current_vp_assist;
+extern struct hv_enlightened_vmcs *current_evmcs;
+extern struct hv_vp_assist_page *current_vp_assist;
int vcpu_enable_evmcs(struct kvm_vm *vm, int vcpu_id);
diff --git a/tools/testing/selftests/kvm/lib/x86_64/vmx.c b/tools/testing/selftests/kvm/lib/x86_64/vmx.c
index f6ec97b7eaef6..8cc4a59ff369f 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/vmx.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/vmx.c
@@ -17,6 +17,9 @@
bool enable_evmcs;
+struct hv_enlightened_vmcs *current_evmcs;
+struct hv_vp_assist_page *current_vp_assist;
+
struct eptPageTableEntry {
uint64_t readable:1;
uint64_t writable:1;
--
2.20.1
prev parent reply other threads:[~2020-05-14 19:05 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200514185311.20294-1-sashal@kernel.org>
2020-05-14 18:52 ` [PATCH AUTOSEL 5.4 25/49] ftrace/selftests: workaround cgroup RT scheduling issues Sasha Levin
2020-05-14 18:52 ` [PATCH AUTOSEL 5.4 26/49] ftrace/selftest: make unresolved cases cause failure if --fail-unresolved set Sasha Levin
2020-05-14 18:52 ` Sasha Levin [this message]
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