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selftests: kvm: move declaration at the beginning of main()

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Placing a declaration of evt_reset is pedantically invalid
according to the C standard.  While GCC does not really care
and only warns with -Wpedantic, clang ignores the declaration
altogether with an error:

x86_64/xen_shinfo_test.c:965:2: error: expected expression
        struct kvm_xen_hvm_attr evt_reset = {
        ^
x86_64/xen_shinfo_test.c:969:38: error: use of undeclared identifier evt_reset
        vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &evt_reset);
                                            ^

Reported-by: Yu Zhang <yu.c.zhang@linux.intel.com>
Reported-by: Sean Christopherson <seanjc@google.com>
Fixes: a79b53aaaa ("KVM: x86: fix deadlock for KVM_XEN_EVTCHN_RESET", 2022-12-28)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2023-01-22 04:04:50 -05:00
parent d732cbf78d
commit 50aa870ba2
1 changed files with 3 additions and 4 deletions
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7
tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c
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@ -434,6 +434,7 @@ static void *juggle_shinfo_state(void *arg)
int main(int argc, char *argv[])
{
struct timespec min_ts, max_ts, vm_ts;
struct kvm_xen_hvm_attr evt_reset;
struct kvm_vm *vm;
pthread_t thread;
bool verbose;
@ -962,10 +963,8 @@ int main(int argc, char *argv[])
}
done:
struct kvm_xen_hvm_attr evt_reset = {
.type = KVM_XEN_ATTR_TYPE_EVTCHN,
.u.evtchn.flags = KVM_XEN_EVTCHN_RESET,
};
evt_reset.type = KVM_XEN_ATTR_TYPE_EVTCHN;
evt_reset.u.evtchn.flags = KVM_XEN_EVTCHN_RESET;
vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &evt_reset);
alarm(0);