It can be used to restore headroom later. Does it possible a headroom
to be > sizeof(int32)/2?

Signed-off-by: Ivan Khoronzhuk <ivan.khoronz...@linaro.org>
---
 include/odp/api/packet_io.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/odp/api/packet_io.h b/include/odp/api/packet_io.h
index cf92751..7b9d82a 100644
--- a/include/odp/api/packet_io.h
+++ b/include/odp/api/packet_io.h
@@ -356,12 +356,12 @@ int odp_pktio_skip_set(odp_pktio_t pktio, uint32_t 
offset);
  *                             Must not exceed the implementation
  *                             defined ODP_PACKET_MAX_HEADROOM.
  *
- * @retval                     0 on success
+ * @retval                     prevoius headroom
  * @retval                     <0 on failure
  *
  * @note Optional.
  */
-int odp_pktio_headroom_set(odp_pktio_t pktio, uint32_t headroom);
+int32_t  odp_pktio_headroom_set(odp_pktio_t pktio, int32_t headroom);
 
 /**
  * Get printable value for an odp_pktio_t
-- 
1.9.1

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