Commit 1448d4a9 authored by Thorsten Blum's avatar Thorsten Blum Committed by Sean Christopherson
Browse files

KVM: x86: Optimize local variable in start_sw_tscdeadline() 



Change the data type of the local variable this_tsc_khz to u32 because
virtual_tsc_khz is also declared as u32.

Since do_div() casts the divisor to u32 anyway, changing the data type
of this_tsc_khz to u32 also removes the following Coccinelle/coccicheck
warning reported by do_div.cocci:

  WARNING: do_div() does a 64-by-32 division, please consider using div64_ul instead

Signed-off-by: default avatarThorsten Blum <thorsten.blum@toblux.com>
Link: https://lore.kernel.org/r/20240814203345.2234-2-thorsten.blum@toblux.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent 47ac09b9

arch/x86/kvm/lapic.c

+1 −1
Original line number Diff line number Diff line
@@ -1944,7 +1944,7 @@ static void start_sw_tscdeadline(struct kvm_lapic *apic) 
	u64 ns = 0;

	ktime_t expire;

	struct kvm_vcpu *vcpu = apic->vcpu;

	unsigned long this_tsc_khz = vcpu->arch.virtual_tsc_khz;

	u32 this_tsc_khz = vcpu->arch.virtual_tsc_khz;

	unsigned long flags;

	ktime_t now;