Messages in this thread | | | Date | Thu, 18 Mar 2021 12:24:15 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH -next] x86: Fix unused variable 'hi' |
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* Xu Yihang <xuyihang@huawei.com> wrote:
> Fixes the following W=1 kernel build warning(s): > arch/x86/hyperv/hv_apic.c:58:15: warning: variable ‘hi’ set but not used [-Wunused-but-set-variable] > > Reported-by: Hulk Robot <hulkci@huawei.com> > Signed-off-by: Xu Yihang <xuyihang@huawei.com> > --- > arch/x86/hyperv/hv_apic.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/arch/x86/hyperv/hv_apic.c b/arch/x86/hyperv/hv_apic.c > index 284e73661a18..c0b0a5774f31 100644 > --- a/arch/x86/hyperv/hv_apic.c > +++ b/arch/x86/hyperv/hv_apic.c > @@ -55,7 +55,8 @@ static void hv_apic_icr_write(u32 low, u32 id) > > static u32 hv_apic_read(u32 reg) > { > - u32 reg_val, hi; > + u32 hi __maybe_unused; > + u32 reg_val; > > switch (reg) { > case APIC_EOI:
Why and under what config does this function trigger the warning?
Thanks,
Ingo
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