WTF: patch "[PATCH] kvm: x86: fix a compile warning" was seriously submitted to be applied to the 4.16-stable tree?

[<gregkh@linuxfoundation.org>]

The patch below was submitted to be applied to the 4.16-stable tree.

I fail to see how this patch meets the stable kernel rules as found at
Documentation/process/stable-kernel-rules.rst.

I could be totally wrong, and if so, please respond to 
<stable@vger.kernel.org> and let me know why this patch should be
applied.  Otherwise, it is now dropped from my patch queues, never to be
seen again.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

>From 3140c156e919b0f5fad5c5f6cf7876c39d1d4f06 Mon Sep 17 00:00:00 2001
From: Peng Hao <peng.hao2@zte.com.cn>
Date: Mon, 2 Apr 2018 09:15:32 +0800
Subject: [PATCH] kvm: x86: fix a compile warning

fix a "warning: no previous prototype".

Cc: stable@vger.kernel.org
Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 8f108131d85d..b2ff74b12ec4 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7943,7 +7943,7 @@ int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index,
 }
 EXPORT_SYMBOL_GPL(kvm_task_switch);
 
-int kvm_valid_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
+static int kvm_valid_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 {
 	if ((sregs->efer & EFER_LME) && (sregs->cr0 & X86_CR0_PG)) {
 		/*