Date: Thu, 9 Jan 2020 14:58:55 -0500 Subject: [PATCH] KVM: squelch uninitialized variable warning From: Barret Rhoden <brho@google.com> If gfn_to_hva_many() fails, __kvm_gfn_to_hva_cache_init() will return an error. Before it does, it might use nr_pages_avail, which my compiler complained about: virt/kvm/kvm_main.c:2193:13: warning: 'nr_pages_avail' may be used uninitialized in this function [-Wmaybe-uninitialized] start_gfn += nr_pages_avail; Signed-off-by: Barret Rhoden <brho@google.com> Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com> --- virt/kvm/kvm_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index d9aced677ddd..f8249b153d33 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -2219,7 +2219,7 @@ static int __kvm_gfn_to_hva_cache_init(s gfn_t start_gfn = gpa >> PAGE_SHIFT; gfn_t end_gfn = (gpa + len - 1) >> PAGE_SHIFT; gfn_t nr_pages_needed = end_gfn - start_gfn + 1; - gfn_t nr_pages_avail; + gfn_t nr_pages_avail = 0; /* Update ghc->generation before performing any error checks. */ ghc->generation = slots->generation;
