kvm: use more precise cast and do not drop __user

Sparse complains on a call to get_compat_sigset, fix it.  The "if"
right above explains that sigmask_arg->sigset is basically a
compat_sigset_t.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index a852af5..0a68c9d 100644 (file)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3350,7 +3350,8 @@ static long kvm_vcpu_compat_ioctl(struct file *filp,
                        if (kvm_sigmask.len != sizeof(compat_sigset_t))
                                goto out;
                        r = -EFAULT;
-                       if (get_compat_sigset(&sigset, (void *)sigmask_arg->sigset))
+                       if (get_compat_sigset(&sigset,
+                                             (compat_sigset_t __user *)sigmask_arg->sigset))
                                goto out;
                        r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);
                } else