From: Mukesh R <[email protected]> Sent: Tuesday, January 20, 2026
6:41 PM
>
> Fix two compiler warnings:
> o smp_ops is only defined if CONFIG_SMP
> o status is set but not explicitly used.
>
> Reported-by: kernel test robot <[email protected]>
> Closes:
> https://lore.kernel.org/oe-kbuild-all/[email protected]/
> Signed-off-by: Mukesh R <[email protected]>
> ---
> arch/x86/hyperv/hv_crash.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/arch/x86/hyperv/hv_crash.c b/arch/x86/hyperv/hv_crash.c
> index c0e22921ace1..82915b22ceae 100644
> --- a/arch/x86/hyperv/hv_crash.c
> +++ b/arch/x86/hyperv/hv_crash.c
> @@ -279,7 +279,6 @@ static void hv_notify_prepare_hyp(void)
> static noinline __noclone void crash_nmi_callback(struct pt_regs *regs)
> {
> struct hv_input_disable_hyp_ex *input;
> - u64 status;
> int msecs = 1000, ccpu = smp_processor_id();
>
> if (ccpu == 0) {
> @@ -313,7 +312,7 @@ static noinline __noclone void crash_nmi_callback(struct
> pt_regs *regs)
> input->rip = trampoline_pa;
> input->arg = devirt_arg;
>
> - status = hv_do_hypercall(HVCALL_DISABLE_HYP_EX, input, NULL);
> + hv_do_hypercall(HVCALL_DISABLE_HYP_EX, input, NULL);
>
> hv_panic_timeout_reboot();
> }
> @@ -628,8 +627,9 @@ void hv_root_crash_init(void)
> if (rc)
> goto err_out;
>
> +#ifdef CONFIG_SMP
> smp_ops.crash_stop_other_cpus = hv_crash_stop_other_cpus;
> -
> +#endif
> crash_kexec_post_notifiers = true;
> hv_crash_enabled = true;
> pr_info("Hyper-V: both linux and hypervisor kdump support enabled\n");
> --
> 2.51.2.vfs.0.1
>
Ingo Molnar has separately fixed the smp_ops problem in [1]. Removing
the unused "status" value looks good to me, though it's probably slightly
better to add (void) to hv_do_hypercall() as an explicit acknowledgement
that there's a return value that's not relevant and is being ignored; i.e.,
(void)hv_do_hypercall(HVCALL_DISABLE_HYP_EX, input, NULL);
Regardless, for the unused "status" part of this patch,
Reviewed-by: Michael Kelley <[email protected]>
[1]
https://lore.kernel.org/all/176959812223.510.4055929851272785854.tip-bot2@tip-bot2/
