On 5/5/20 5:05 AM, Peter Xu wrote:
GCC 10.0.1 gives me this warning when building KVM:
warning: ‘nr_pages_avail’ may be used uninitialized in this function [-Wmaybe-uninitialized]
2442 | for ( ; start_gfn <= end_gfn; start_gfn += nr_pages_avail) {
It should not happen, but silent it.
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
---
virt/kvm/kvm_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: Gavin Shan <gshan@xxxxxxxxxx>
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 74bdb7bf3295..2da293885a67 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2425,7 +2425,7 @@ static int __kvm_gfn_to_hva_cache_init(struct kvm_memslots *slots,
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;
