void lib_ring_buffer_memset(const struct lttng_kernel_ring_buffer_config *config,
struct lttng_kernel_ring_buffer_ctx *ctx, int c, size_t len)
{
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struct lttng_kernel_ring_buffer_backend *bufb = &ctx->priv.buf->backend;
struct channel_backend *chanb = &ctx->priv.chan->backend;
size_t index, bytes_left_in_page;