[PATCH] event: fix warning from useless snprintf

[Stephen Hemminger]

On Wed, 24 Apr 2024 08:45:52 +0000
"Van Haaren, Harry" <harry.van.haaren at intel.com> wrote:

> > From: Stephen Hemminger <stephen at networkplumber.org>
> > Sent: Wednesday, April 24, 2024 4:45 AM
> > To: dev at 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

There are better ways of tracking allocations like ASAN.
There are better memory allocators as well which use something different.