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x86/hyperv: Fix unused variable 'hi' warning in hv_apic_read
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] Compiled with CONFIG_HYPERV enabled: make allmodconfig ARCH=x86_64 CROSS_COMPILE=x86_64-linux-gnu- make W=1 arch/x86/hyperv/hv_apic.o ARCH=x86_64 CROSS_COMPILE=x86_64-linux-gnu- HV_X64_MSR_EOI occupies bit 31:0 and HV_X64_MSR_TPR occupies bit 7:0, which means the higher 32 bits are not really used. Cast the variable hi to void to silence this warning. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Xu Yihang <xuyihang@huawei.com> Link: https://lore.kernel.org/r/20210323025013.191533-1-xuyihang@huawei.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
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@ -60,9 +60,11 @@ static u32 hv_apic_read(u32 reg)
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switch (reg) {
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case APIC_EOI:
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rdmsr(HV_X64_MSR_EOI, reg_val, hi);
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(void)hi;
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return reg_val;
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case APIC_TASKPRI:
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rdmsr(HV_X64_MSR_TPR, reg_val, hi);
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(void)hi;
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return reg_val;
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default:
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