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SubjectRe: [this_cpu_xx V4 02/20] this_cpu: X86 optimized this_cpu operations

* cl@linux-foundation.org <cl@linux-foundation.org> wrote:

> Basically the existing percpu ops can be used for this_cpu variants
> that allow operations also on dynamically allocated percpu data.
> However, we do not pass a reference to a percpu variable in. Instead a
> dynamically or statically allocated percpu variable is provided.
>
> Preempt, the non preempt and the irqsafe operations generate the same
> code. It will always be possible to have the requires per cpu
> atomicness in a single RMW instruction with segment override on x86.
>
> 64 bit this_cpu operations are not supported on 32 bit.
>
> Signed-off-by: Christoph Lameter <cl@linux-foundation.org>

Acked-by: Ingo Molnar <mingo@elte.hu>

Ingo


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