Re: [PATCH v1 00/18] Backport fixes for -Wdiscarded-qualifiers and -Wnonnull with newer glibc

[Greg KH <gregkh@linuxfoundation.org>]

On Sat, May 09, 2026 at 11:05:41PM +0530, Shreenidhi Shedi wrote:
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> 
> Hi all,
> 
> This patch series backports a number of patches from master to 6.1.y
> to fix `-Wdiscarded-qualifiers` and `-Wnonnull` build issues with
> newer glibc versions.
> 
> Arnaldo Carvalho de Melo (12):
>   perf diff: Constify strchr() return variables
>   perf test bpf: Address error about non-null argument for epoll_pwait
>     2nd arg
>   perf trace: Deal with compiler const checks
>   perf tools: Use const for variables receiving str{str,r?chr}() returns
>   perf strlist: Don't write to const memory
>   perf metricgroup: Constify variables storing the result of strchr() on
>     const tables
>   perf session: Don't write to memory pointed to a const pointer
>   perf trace-event: Constify variables storing the result of strchr() on
>     const tables
>   perf units: Constify variables storing the result of strchr() on const
>     tables
>   perf time-utils: Constify variables storing the result of strchr() on
>     const tables
>   perf demangle-java: Constify variables storing the result of strchr()
>     on const tables
>   perf bpf-event: Constify variables storing the result of strchr() on
>     const tables
> 
> Dr. David Alan Gilbert (1):
>   perf tools: Remove unused color_fwrite_lines
> 
> Mikhail Gavrilov (1):
>   libbpf: Fix -Wdiscarded-qualifiers under C23
> 
> Shreenidhi Shedi (4):
>   perf list: Fix -Wdiscarded-qualifiers under C23
>   perf parse-events: Fix -Wdiscarded-qualifiers under C23
>   perf bpf: Fix -Wdiscarded-qualifiers under C23
>   perf parse-events:: Fix -Wdiscarded-qualifiers under C23
> 
>  tools/lib/bpf/libbpf.c             |  2 +-
>  tools/perf/builtin-diff.c          | 12 +++++-------
>  tools/perf/builtin-list.c          |  3 ++-
>  tools/perf/builtin-trace.c         |  2 +-
>  tools/perf/jvmti/libjvmti.c        |  2 +-
>  tools/perf/tests/bpf.c             |  3 ++-
>  tools/perf/util/bpf-event.c        |  3 ++-
>  tools/perf/util/bpf-loader.c       |  2 +-
>  tools/perf/util/color.c            | 28 ----------------------------
>  tools/perf/util/color.h            |  1 -
>  tools/perf/util/demangle-java.c    |  2 +-
>  tools/perf/util/evlist.c           |  3 ++-
>  tools/perf/util/metricgroup.c      |  3 +--
>  tools/perf/util/parse-events.c     |  2 +-
>  tools/perf/util/print-events.c     |  4 ++--
>  tools/perf/util/session.c          |  6 +++---
>  tools/perf/util/strlist.c          | 12 ++++++++----
>  tools/perf/util/time-utils.c       |  4 ++--
>  tools/perf/util/trace-event-info.c |  2 +-
>  tools/perf/util/units.c            |  2 +-
>  20 files changed, 37 insertions(+), 61 deletions(-)
> 
> -- 
> 2.54.0
> 

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>