Commit 3e934673 authored by Tom Lendacky's avatar Tom Lendacky Committed by Paolo Bonzini
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KVM: SVM: Fix build error when using -Werror=unused-but-set-variable 



Commit 916e3e5f ("KVM: SVM: Do not use user return MSR support for
virtualized TSC_AUX") introduced a local variable used for the rdmsr()
function for the high 32-bits of the MSR value. This variable is not used
after being set and triggers a warning or error, when treating warnings
as errors, when the unused-but-set-variable flag is set. Mark this
variable as __maybe_unused to fix this.

Fixes: 916e3e5f ("KVM: SVM: Do not use user return MSR support for virtualized TSC_AUX")
Signed-off-by: default avatarTom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: default avatarSean Christopherson <seanjc@google.com>
Message-Id: <0da9874b6e9fcbaaa5edeb345d7e2a7c859fc818.1696271334.git.thomas.lendacky@amd.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 3fdc6087

arch/x86/kvm/svm/svm.c

+1 −1
Original line number Diff line number Diff line
@@ -691,7 +691,7 @@ static int svm_hardware_enable(void) 
	 */

	if (boot_cpu_has(X86_FEATURE_V_TSC_AUX)) {

		struct sev_es_save_area *hostsa;

		u32 msr_hi;

		u32 __maybe_unused msr_hi;



		hostsa = (struct sev_es_save_area *)(page_address(sd->save_area) + 0x400);