Explicitly cast the integer literal to an unsigned long when stuffing a
non-canonical value into the host virtual address during private memslot
deletion. The explicit cast fixes a warning that gets promoted to an
error when running with KVM's newfangled -Werror setting.
arch/x86/kvm/x86.c:9739:9: error: large integer implicitly truncated
to unsigned type [-Werror=overflow]
Fixes: a3e967c0b87d3 ("KVM: Terminate memslot walks via used_slots"
Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
---
arch/x86/kvm/x86.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index ba4d476b79ad..fa03f31ab33c 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -9735,8 +9735,12 @@ int __x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size)
if (!slot || !slot->npages)
return 0;
- /* Stuff a non-canonical value to catch use-after-delete. */
- hva = 0xdeadull << 48;
+ /*
+ * Stuff a non-canonical value to catch use-after-delete. This
+ * ends up being 0 on 32-bit KVM, but there's no better
+ * alternative.
+ */
+ hva = (unsigned long)(0xdeadull << 48);
old_npages = slot->npages;
}
--
2.24.1
