napi_prefer_busy_poll
bool napi_prefer_busy_poll;
if (ctx->napi_prefer_busy_poll)
bool napi_prefer_busy_poll;
ctx->napi_prefer_busy_poll, BUSY_POLL_BUDGET);
ctx->napi_prefer_busy_poll, BUSY_POLL_BUDGET);
ctx->napi_prefer_busy_poll = false;
WRITE_ONCE(ctx->napi_prefer_busy_poll, !!napi->prefer_busy_poll);
.prefer_busy_poll = ctx->napi_prefer_busy_poll,
.prefer_busy_poll = ctx->napi_prefer_busy_poll
WRITE_ONCE(ctx->napi_prefer_busy_poll, false);
iowq->napi_prefer_busy_poll = READ_ONCE(ctx->napi_prefer_busy_poll);
if (napi_prefer_busy_poll(n)) {