Re: [PATCH] event: fix warning from useless snprintf

["Van Haaren, Harry" <harry.van.haaren@intel.com>]

> ________________________________________
> From: Stephen Hemminger <stephen@networkplumber.org>
> Sent: Wednesday, April 24, 2024 5:13 PM
> To: Van Haaren, Harry
> Cc: dev@dpdk.org; Richardson, Bruce; Jerin Jacob
> Subject: Re: [PATCH] event: fix warning from useless snprintf
> 
> On Wed, 24 Apr 2024 08:45:52 +0000
> "Van Haaren, Harry" <harry.van.haaren@intel.com> wrote:
> 
> > > From: Stephen Hemminger <stephen@networkplumber.org>
> > > Sent: Wednesday, April 24, 2024 4:45 AM
> > > To: dev@dpdk.org
> > > Cc: Richardson, Bruce; Stephen Hemminger; Van Haaren, Harry; Jerin Jacob
> > > Subject: [PATCH] event: fix warning from useless snprintf
> > >
> > > With Gcc-14, this warning is generated:
> > > ../drivers/event/sw/sw_evdev.c:263:3: warning: 'snprintf' will always be truncated;
> > >     specified size is 12, but format string expands to at least 13 [-Wformat-truncation]
> > >   263 |                 snprintf(buf, sizeof(buf), "sw%d_iq_%d_rob", dev_id, i);
> > >       |                 ^
> > >
> > > Yet the whole printf to the buf is unnecessary. The type string argument
> > > has never been implemented, and should just be NULL.  Removing the
> > > unnecessary snprintf, then means IQ_ROB_NAMESIZE can be removed.
> >
> > I understand that today the "type" value isn't implemented, but across the DPDK codebase it
> > seems like others are filling in "type" to be some debug-useful name/string. If it was added
> > in future it'd be nice to have the ROB/IQ memory identified by name, like the rest of DPDK components.
> 
> No, don't bother. This is a case of https://en.wikipedia.org/wiki/You_aren%27t_gonna_need_it

I agree that YAGNI perhaps applied when designing the APIs, but the "type" parameter is there now...
Should we add a guidance of "when reworking code, always pass NULL as the type parameter to rte_malloc functions" somewhere in the programmers guide, to align community with this "pass NULL for type" initiative?

<snip>

Acked-by: Harry van Haaren <harry.van.haaren@intel.com>