[PATCH] eventdev: avoid non-burst shortcut for variable-size bursts

[Mattias Rönnblom]

Use non-burst event enqueue and dequeue calls from burst enqueue and
dequeue only when the burst size is compile-time constant (and equal
to one).

Signed-off-by: Mattias Rönnblom <mattias.ronnb...@ericsson.com>
---
 lib/eventdev/rte_eventdev.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/eventdev/rte_eventdev.h b/lib/eventdev/rte_eventdev.h
index a90e23ac8b..8af15816db 100644
--- a/lib/eventdev/rte_eventdev.h
+++ b/lib/eventdev/rte_eventdev.h
@@ -1944,7 +1944,7 @@ __rte_event_enqueue_burst(uint8_t dev_id, uint8_t port_id,
         * Allow zero cost non burst mode routine invocation if application
         * requests nb_events as const one
         */
-       if (nb_events == 1)
+       if (__builtin_constant_p(nb_events) && nb_events == 1)
                return (fp_ops->enqueue)(port, ev);
        else
                return fn(port, ev, nb_events);
@@ -2200,7 +2200,7 @@ rte_event_dequeue_burst(uint8_t dev_id, uint8_t port_id, 
struct rte_event ev[],
         * Allow zero cost non burst mode routine invocation if application
         * requests nb_events as const one
         */
-       if (nb_events == 1)
+       if (__builtin_constant_p(nb_events) && nb_events == 1)
                return (fp_ops->dequeue)(port, ev, timeout_ticks);
        else
                return (fp_ops->dequeue_burst)(port, ev, nb_events,
-- 
2.34.1