KVM: Return '0' directly when there's no task to yield to

Do "return 0" instead of initializing and returning a local variable in
kvm_vcpu_yield_to(), e.g. so that it's more obvious what the function
returns if there is no task.

No functional change intended.

Acked-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20240802200136.329973-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 5891bad97a7e3107d78c9ce1911fc8fd4ec90efd..17048d9575e3b66f42dc8168641777be635b4b6f 100644 (file)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3772,7 +3772,7 @@ int kvm_vcpu_yield_to(struct kvm_vcpu *target)
 {
        struct pid *pid;
        struct task_struct *task = NULL;
-       int ret = 0;
+       int ret;
 
        rcu_read_lock();
        pid = rcu_dereference(target->pid);
@@ -3780,7 +3780,7 @@ int kvm_vcpu_yield_to(struct kvm_vcpu *target)
                task = get_pid_task(pid, PIDTYPE_PID);
        rcu_read_unlock();
        if (!task)
-               return ret;
+               return 0;
        ret = yield_to(task, 1);
        put_task_struct(task);