linux-kernel - Re: [PATCH v4 01/11] perf dso: Move libunwind dso

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Message-ID: <Z8iPeEbldTUqotsQ@x1>
Date: Wed, 5 Mar 2025 14:52:56 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Kan Liang <kan.liang@...ux.intel.com>,
	John Garry <john.g.garry@...cle.com>, Will Deacon <will@...nel.org>,
	James Clark <james.clark@...aro.org>,
	Mike Leach <mike.leach@...aro.org>, Leo Yan <leo.yan@...ux.dev>,
	guoren <guoren@...nel.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Charlie Jenkins <charlie@...osinc.com>,
	Bibo Mao <maobibo@...ngson.cn>, Huacai Chen <chenhuacai@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Jiri Slaby <jirislaby@...nel.org>,
	Björn Töpel <bjorn@...osinc.com>,
	Howard Chu <howardchu95@...il.com>, linux-kernel@...r.kernel.org,
	linux-perf-users@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	"linux-csky@...r.kernel.org" <linux-csky@...r.kernel.org>,
	linux-riscv@...ts.infradead.org, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v4 01/11] perf dso: Move libunwind dso_data variables
 into ifdef

On Mon, Mar 03, 2025 at 09:02:55PM -0800, Ian Rogers wrote:
> The variables elf_base_addr, debug_frame_offset, eh_frame_hdr_addr and
> eh_frame_hdr_offset are only accessed in unwind-libunwind-local.c
> which is conditionally built on having libunwind support. Make the
> variables conditional on libunwind support too.

Reviewed-by: Arnaldo Carvalho de Melo <acme@...hat.com>
 
> Signed-off-by: Ian Rogers <irogers@...gle.com>
> ---
>  tools/perf/util/dso.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
> index bb8e8f444054..dfd763a0bd9d 100644
> --- a/tools/perf/util/dso.h
> +++ b/tools/perf/util/dso.h
> @@ -154,10 +154,12 @@ struct dso_data {
>  	int		 status;
>  	u32		 status_seen;
>  	u64		 file_size;
> +#ifdef HAVE_LIBUNWIND_SUPPORT
>  	u64		 elf_base_addr;
>  	u64		 debug_frame_offset;
>  	u64		 eh_frame_hdr_addr;
>  	u64		 eh_frame_hdr_offset;
> +#endif
>  };
>  
>  struct dso_bpf_prog {
> -- 
> 2.48.1.711.g2feabab25a-goog