linux-kernel - [PATCH] KVM: x86: Fix function address when kvm_x86

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Date:   Tue, 22 Feb 2022 14:25:10 +0800
From:   Like Xu <like.xu.linux@...il.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Jim Mattson <jmattson@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Like Xu <likexu@...cent.com>
Subject: [PATCH] KVM: x86: Fix function address when kvm_x86_ops.func is NULL

From: Like Xu <likexu@...cent.com>

Fix the function address for __static_call_return0() which is used by
static_call_update() when a func in struct kvm_x86_ops is NULL.

Fixes: 5be2226f417d ("KVM: x86: allow defining return-0 static calls")
Signed-off-by: Like Xu <likexu@...cent.com>
---
 arch/x86/include/asm/kvm_host.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 713e08f62385..312f5ee19514 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1548,7 +1548,7 @@ static inline void kvm_ops_static_call_update(void)
 #define KVM_X86_OP_OPTIONAL __KVM_X86_OP
 #define KVM_X86_OP_OPTIONAL_RET0(func) \
 	static_call_update(kvm_x86_##func, kvm_x86_ops.func ? : \
-			   (void *) __static_call_return0);
+			   (void *)&__static_call_return0);
 #include <asm/kvm-x86-ops.h>
 #undef __KVM_X86_OP
 }
-- 
2.35.0