[PATCH v3 4/6] doc: replace doxygen example in contribution guide

[Thomas Monjalon <thomas@monjalon.net>]

The provided example of doxygen header is about a deprecated function.
It is replaced by rte_spinlock_trylock() which is small and
good enough for the purpose.

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Reviewed-by: Andrew Rybchenko <arybchenko@solarflare.com>
---
 doc/guides/contributing/documentation.rst | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/doc/guides/contributing/documentation.rst b/doc/guides/contributing/documentation.rst
index 097575ad7..0165990ed 100644
--- a/doc/guides/contributing/documentation.rst
+++ b/doc/guides/contributing/documentation.rst
@@ -615,19 +615,14 @@ The following are some guidelines for use of Doxygen in the DPDK API documentati
   .. code-block:: c
 
      /**
-      * Attach a new Ethernet device specified by arguments.
-      *
-      * @param devargs
-      *  A pointer to a strings array describing the new device
-      *  to be attached. The strings should be a pci address like
-      *  `0000:01:00.0` or **virtual** device name like `net_pcap0`.
-      * @param port_id
-      *  A pointer to a port identifier actually attached.
+      * Try to take the lock.
       *
+      * @param sl
+      *   A pointer to the spinlock.
       * @return
-      *  0 on success and port_id is filled, negative on error.
+      *   1 if the lock is successfully taken; 0 otherwise.
       */
-     int rte_eth_dev_attach(const char *devargs, uint8_t *port_id);
+     int rte_spinlock_trylock(rte_spinlock_t *sl);
 
 * Doxygen supports Markdown style syntax such as bold, italics, fixed width text and lists.
   For example the second line in the ``devargs`` parameter in the previous example will be rendered as:
-- 
2.19.0