Jan,
This was suggested but we thought it might be safer to keep the
get_cpu/put_cpu pair in case -rt kernels require it (which might be
bullshit, but nobody verified).
On Mon, Jul 20, 2009 at 11:30:12AM +0200, Jan Kiszka wrote:
> spin_lock disables preemption, so we can simply read the current cpu.
>
> Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
> ---
>
> virt/kvm/kvm_main.c | 3 +--
> 1 files changed, 1 insertions(+), 2 deletions(-)
>
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index 7cd1c10..98e4ec8 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -741,8 +741,8 @@ static bool make_all_cpus_request(struct kvm *kvm,
> unsigned int req)
> if (alloc_cpumask_var(&cpus, GFP_ATOMIC))
> cpumask_clear(cpus);
>
> - me = get_cpu();
> spin_lock(&kvm->requests_lock);
> + me = smp_processor_id();
> kvm_for_each_vcpu(i, vcpu, kvm) {
> if (test_and_set_bit(req, &vcpu->requests))
> continue;
> @@ -757,7 +757,6 @@ static bool make_all_cpus_request(struct kvm *kvm,
> unsigned int req)
> else
> called = false;
> spin_unlock(&kvm->requests_lock);
> - put_cpu();
> free_cpumask_var(cpus);
> return called;
> }
> --
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