linux-kernel - [patch 8/9] x86/cpu: Provide a declaration for itlb_multihit_kvm

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Message-ID: <20240304005104.787173239@linutronix.de>
Date: Mon,  4 Mar 2024 11:12:28 +0100 (CET)
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
Cc: x86@...nel.org,
 Linus Torvalds <torvalds@...uxfoundation.org>,
 Uros Bizjak <ubizjak@...il.com>,
 linux-sparse@...r.kernel.org,
 lkp@...el.com,
 oe-kbuild-all@...ts.linux.dev
Subject: [patch 8/9] x86/cpu: Provide a declaration for
 itlb_multihit_kvm_mitigation

sparse complains rightfully about the missing declaration which has been
placed sloppily into the usage site:

bugs.c:2223:6: sparse: warning: symbol 'itlb_multihit_kvm_mitigation' was
	       	       		       not declared. Should it be static?

Add it to spec-ctrl.h where it belongs and remove the one in the kvm code.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 arch/x86/include/asm/spec-ctrl.h |    2 ++
 arch/x86/kvm/mmu/mmu.c           |    3 +--
 2 files changed, 3 insertions(+), 2 deletions(-)

--- a/arch/x86/include/asm/spec-ctrl.h
+++ b/arch/x86/include/asm/spec-ctrl.h
@@ -96,4 +96,6 @@ static inline void speculative_store_byp
 extern void speculation_ctrl_update(unsigned long tif);
 extern void speculation_ctrl_update_current(void);
 
+extern bool itlb_multihit_kvm_mitigation;
+
 #endif
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -53,12 +53,11 @@
 #include <asm/cmpxchg.h>
 #include <asm/io.h>
 #include <asm/set_memory.h>
+#include <asm/spec-ctrl.h>
 #include <asm/vmx.h>
 
 #include "trace.h"
 
-extern bool itlb_multihit_kvm_mitigation;
-
 static bool nx_hugepage_mitigation_hard_disabled;
 
 int __read_mostly nx_huge_pages = -1;