On Tue, Mar 23, 2021 at 10:43:02AM +0800, Xu Yihang wrote: > Fixes the following W=1 kernel build warning(s): > arch/x86/hyperv/hv_spinlock.c:28:16: warning: variable ‘msr_val’ set but not > used [-Wunused-but-set-variable] > unsigned long msr_val; > > As Hypervisor Top-Level Functional Specification states in chapter 7.5 > Virtual Processor Idle Sleep State, "A partition which possesses the > AccessGuestIdleMsr privilege (refer to section 4.2.2) may trigger entry into > the virtual processor idle sleep state through a read to the > hypervisor-defined MSR HV_X64_MSR_GUEST_IDLE". That means only a read is > necessary, msr_val is not uesed, so potentially cast to void in order to > silent this warning. > > Reference: > https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs > > Reported-by: Hulk Robot <hul...@huawei.com> > Signed-off-by: Xu Yihang <xuyih...@huawei.com>
Applied to hyperv-next. Thanks.
