linux-kernel - [PATCH] kvm: fix maybe-uninitialized compiler warning

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Date:	Fri,  4 Sep 2015 23:07:56 +0200
From:	Clemens Gruber <clemens.gruber@...ruber.com>
To:	kvm@...r.kernel.org
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	Clemens Gruber <clemens.gruber@...ruber.com>
Subject: [PATCH] kvm: fix maybe-uninitialized compiler warning

Fixes the following compiler warning, occuring with GCC 5.2.0:

arch/x86/kvm/mmu.c: In function ‘handle_mmio_page_fault_common’:
arch/x86/kvm/mmu.c:3332:9: warning: ‘leaf’ may be used uninitialized in
this
function [-Wmaybe-uninitialized]
   while (root >= leaf) {
         ^
arch/x86/kvm/mmu.c:3304:12: note: ‘leaf’ was declared here
  int root, leaf;

Signed-off-by: Clemens Gruber <clemens.gruber@...ruber.com>
---
 arch/x86/kvm/mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index fb16a8e..0af5a39 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -3301,7 +3301,7 @@ walk_shadow_page_get_mmio_spte(struct kvm_vcpu *vcpu, u64 addr, u64 *sptep)
 {
 	struct kvm_shadow_walk_iterator iterator;
 	u64 sptes[PT64_ROOT_LEVEL], spte = 0ull;
-	int root, leaf;
+	int root, leaf=0;
 	bool reserved = false;
 
 	if (!VALID_PAGE(vcpu->arch.mmu.root_hpa))
-- 
2.5.1

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