[PATCH v2] lib: remove empty return types from doxygen comments

[Stephen Hemminger]

On Tue, 25 Oct 2022 16:32:38 +0300
Ali Alnubani <alialnu at nvidia.com> wrote:

> Recent versions of doxygen (1.9.4 and newer) complain about
> documented return types for functions that don't return anything.
> 
> This patch removes these return types to fix build errors similar
> to this one:
> [..]
> Generating doc/api/doxygen with a custom command
> FAILED: doc/api/html
> /usr/bin/python3 /path/to/doc/api/generate_doxygen.py doc/api/html
>   /usr/bin/doxygen doc/api/doxy-api.conf
> /root/dpdk/lib/eal/include/rte_bitmap.h:324: error: found documented
>   return type for rte_bitmap_prefetch0 that does not return anything
>   (warning treated as error, aborting now)
> [..]
> 
> Tested with doxygen versions: 1.8.13, 1.8.17, 1.9.1, and 1.9.4.
> 
> Signed-off-by: Ali Alnubani <alialnu at nvidia.com>

Acked-by: Stephen Hemminger <stephen at networkplumber.org>