netdev - Re: [PATCH v2 bpf-next] tools/lib/bpf: fix -Wdiscarded-qualifiers under C23

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Message-ID: <lhufr9y6zw8.fsf@oldenburg.str.redhat.com>
Date: Fri, 28 Nov 2025 14:38:15 +0100
From: Florian Weimer <fweimer@...hat.com>
To: Mikhail Gavrilov <mikhail.v.gavrilov@...il.com>
Cc: bpf@...r.kernel.org,  andrii@...nel.org,  ast@...nel.org,
  daniel@...earbox.net,  netdev@...r.kernel.org
Subject: Re: [PATCH v2 bpf-next] tools/lib/bpf: fix -Wdiscarded-qualifiers
 under C23

* Mikhail Gavrilov:

> - Use explicit casts instead of changing variable types to const char *,
>   because the variables are already declared as char * earlier in the
>   functions and used in contexts requiring mutability.
>   This is common practice in the kernel when full const-correctness
>   cannot be preserved without major refactoring.

What kind of mutability is this about?  Obviously char *const won't
work, but const char * seems to be fine for these variables?

Thanks,
Florian