Re: [PATCH v2 0/4] fix clang 23 unused but set warnings

[Stephen Hemminger <stephen@networkplumber.org>]

On Sat, 29 Aug 2026 08:44:44 -0700
Stephen Hemminger <stephen@networkplumber.org> wrote:

> Clang 23 adds -Wunused-but-set-global, which reports file scope
> variables that are assigned but never read. It is enabled by -Wall and
> does not appear with gcc or with clang 20 through 22.
> 
> Three of these are dead variables and are simply removed. The fourth,
> 'alive' in dpaa_of.c, is a real debug aid: it is only read by
> DPAAX_HWWARN, which discards its condition when RTE_LIBRTE_DPAAX_DEBUG
> is not defined. That one is fixed by making the empty expansion consume
> its argument, which keeps the condition compiled in both builds and
> covers every other DPAAX_HWWARN user as well.
> 
> v2 - remove more unused code as suggested.
> 
> Stephen Hemminger (4):
>   common/dpaax: fix unused variable warning in non-debug build
>   bus/dpaa: remove unused qman_clk variable
>   common/zsda: remove unused device counter
>   net/qede: remove unused app version variable
> 
>  drivers/bus/dpaa/base/qbman/qman_driver.c |  4 ----
>  drivers/common/dpaax/dpaax_logs.h         |  3 ++-
>  drivers/common/zsda/zsda_device.c         |  5 -----
>  drivers/net/qede/qede_debug.c             | 20 --------------------
>  4 files changed, 2 insertions(+), 30 deletions(-)
> 

Applied to next-net; so that clang 23 build tests can run across all drivers