On Fri, 9 Feb 2024 10:21:58 +
Vincent Donnefort wrote:
> +static void rb_update_meta_page(struct ring_buffer_per_cpu *cpu_buffer)
> +{
> + struct trace_buffer_meta *meta = cpu_buffer->meta_page;
> +
> + WRITE_ONCE(meta->reader.read, cpu_buffer->reader_page->read);
> +
In preparation for allowing the user-space to map a ring-buffer, add
a set of mapping functions:
ring_buffer_{map,unmap}()
ring_buffer_map_fault()
And controls on the ring-buffer:
ring_buffer_map_get_reader() /* swap reader and head */
Mapping the ring-buffer also involves:
A unique
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