linux-kernel - [PATCH 5.6 44/49] x86/kvm: fix a missing-prototypes "vmread

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Message-Id: <20200508123049.001191211@linuxfoundation.org>
Date:   Fri,  8 May 2020 14:36:01 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Qian Cai <cai@....pw>,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: [PATCH 5.6 44/49] x86/kvm: fix a missing-prototypes "vmread_error"

From: Qian Cai <cai@....pw>

commit 514ccc194971d0649e4e7ec8a9b3a6e33561d7bf upstream.

The commit 842f4be95899 ("KVM: VMX: Add a trampoline to fix VMREAD error
handling") removed the declaration of vmread_error() causes a W=1 build
failure with KVM_WERROR=y. Fix it by adding it back.

arch/x86/kvm/vmx/vmx.c:359:17: error: no previous prototype for 'vmread_error' [-Werror=missing-prototypes]
 asmlinkage void vmread_error(unsigned long field, bool fault)
                 ^~~~~~~~~~~~

Signed-off-by: Qian Cai <cai@....pw>
Message-Id: <20200402153955.1695-1-cai@....pw>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/x86/kvm/vmx/ops.h |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/x86/kvm/vmx/ops.h
+++ b/arch/x86/kvm/vmx/ops.h
@@ -12,6 +12,7 @@
 
 #define __ex(x) __kvm_handle_fault_on_reboot(x)
 
+asmlinkage void vmread_error(unsigned long field, bool fault);
 __attribute__((regparm(0))) void vmread_error_trampoline(unsigned long field,
 							 bool fault);
 void vmwrite_error(unsigned long field, unsigned long value);