[PATCH 11/22] KVM: x86: hyper-v: replace bitmap_weight() with hweight64()

[Yury Norov]

kvm_hv_flush_tlb() applies bitmap API to a u64 variable valid_bank_mask.
Since valid_bank_mask has a fixed size, we can use hweight64() and avoid
excessive bloating.

CC: Borislav Petkov <bp@xxxxxxxxx>
CC: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
CC: H. Peter Anvin <hpa@xxxxxxxxx>
CC: Ingo Molnar <mingo@xxxxxxxxxx>
CC: Jim Mattson <jmattson@xxxxxxxxxx>
CC: Joerg Roedel <joro@xxxxxxxxxx>
CC: Paolo Bonzini <pbonzini@xxxxxxxxxx>
CC: Sean Christopherson <seanjc@xxxxxxxxxx>
CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CC: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
CC: Wanpeng Li <wanpengli@xxxxxxxxxxx>
CC: kvm@xxxxxxxxxxxxxxx
CC: linux-kernel@xxxxxxxxxxxxxxx
CC: x86@xxxxxxxxxx
Signed-off-by: Yury Norov <yury.norov@xxxxxxxxx>
---
 arch/x86/kvm/hyperv.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 41585f0edf1e..b652b856df2b 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -1855,7 +1855,7 @@ static u64 kvm_hv_flush_tlb(struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc)
 		all_cpus = flush_ex.hv_vp_set.format !=
 			HV_GENERIC_SET_SPARSE_4K;
 
-		if (hc->var_cnt != bitmap_weight((unsigned long *)&valid_bank_mask, 64))
+		if (hc->var_cnt != hweight64(valid_bank_mask))
 			return HV_STATUS_INVALID_HYPERCALL_INPUT;
 
 		if (all_cpus)
@@ -1956,7 +1956,7 @@ static u64 kvm_hv_send_ipi(struct kvm_vcpu *vcpu, struct kvm_hv_hcall *hc)
 		valid_bank_mask = send_ipi_ex.vp_set.valid_bank_mask;
 		all_cpus = send_ipi_ex.vp_set.format == HV_GENERIC_SET_ALL;
 
-		if (hc->var_cnt != bitmap_weight(&valid_bank_mask, 64))
+		if (hc->var_cnt != hweight64(valid_bank_mask))
 			return HV_STATUS_INVALID_HYPERCALL_INPUT;
 
 		if (all_cpus)
-- 
2.32.0