By checking vcpu->requests we can do an early exit and allow gcc
to optimize multiple kvm_check_request into one block for the
common case (no requests).
Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
---
include/linux/kvm_host.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 1c9c973..b15b460 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -1115,6 +1115,8 @@ static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
{
+ if (likely(!vcpu->requests))
+ return false;
if (test_bit(req, &vcpu->requests)) {
clear_bit(req, &vcpu->requests);
--
2.5.5
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