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-rw-r--r--kvm-all.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/kvm-all.c b/kvm-all.c
index 42e5e23d5d..ba2cee10f2 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -79,7 +79,10 @@ struct KVMState
int pit_state2;
int xsave, xcrs;
int many_ioeventfds;
- int irqchip_inject_ioctl;
+ /* The man page (and posix) say ioctl numbers are signed int, but
+ * they're not. Linux, glibc and *BSD all treat ioctl numbers as
+ * unsigned, and treating them as signed here can break things */
+ unsigned irqchip_inject_ioctl;
#ifdef KVM_CAP_IRQ_ROUTING
struct kvm_irq_routing *irq_routes;
int nr_allocated_irq_routes;