linux-kernel - Re: [PATCH v5 13/21] perf env: Move arch errno function to only use in env

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Message-ID: <ZyPb3ckI9-wRA1hE@x1>
Date: Thu, 31 Oct 2024 16:34:53 -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>,
	James Clark <james.clark@...aro.org>,
	Howard Chu <howardchu95@...il.com>,
	Athira Jajeev <atrajeev@...ux.vnet.ibm.com>,
	Michael Petlan <mpetlan@...hat.com>,
	Veronika Molnarova <vmolnaro@...hat.com>,
	Dapeng Mi <dapeng1.mi@...ux.intel.com>,
	Thomas Richter <tmricht@...ux.ibm.com>,
	Ilya Leoshkevich <iii@...ux.ibm.com>,
	Colin Ian King <colin.i.king@...il.com>,
	Weilin Wang <weilin.wang@...el.com>,
	Andi Kleen <ak@...ux.intel.com>,
	Josh Poimboeuf <jpoimboe@...hat.com>, linux-kernel@...r.kernel.org,
	linux-perf-users@...r.kernel.org
Subject: Re: [PATCH v5 13/21] perf env: Move arch errno function to only use
 in env

On Wed, Oct 30, 2024 at 06:42:44PM -0700, Ian Rogers wrote:
> Move arch_syscalls__strerrno_function out of builtin-trace.c to env.c
> so that there isn't a util to builtin function call. This allows the
> python.c stub to be removed. Also, remove declaration/prototype from
> env.h and make static to reduce scope. The include is moved inside
> ifdefs to avoid, "defined but unused warnings".

Acked-by: Arnaldo Carvalho de Melo <acme@...hat.com>
 
> Signed-off-by: Ian Rogers <irogers@...gle.com>
> ---
>  tools/perf/builtin-trace.c                  | 1 -
>  tools/perf/trace/beauty/arch_errno_names.sh | 3 ++-
>  tools/perf/util/env.c                       | 4 ++++
>  tools/perf/util/env.h                       | 2 --
>  tools/perf/util/python.c                    | 6 ------
>  5 files changed, 6 insertions(+), 10 deletions(-)
> 
> diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> index 748b061f8678..5d0345480140 100644
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
> @@ -1108,7 +1108,6 @@ static bool syscall_arg__strtoul_btf_type(char *bf __maybe_unused, size_t size _
>  	    .strtoul	= STUL_STRARRAY_FLAGS, \
>  	    .parm	= &strarray__##array, }
>  
> -#include "trace/beauty/arch_errno_names.c"
>  #include "trace/beauty/eventfd.c"
>  #include "trace/beauty/futex_op.c"
>  #include "trace/beauty/futex_val3.c"
> diff --git a/tools/perf/trace/beauty/arch_errno_names.sh b/tools/perf/trace/beauty/arch_errno_names.sh
> index 30d3889b2957..b22890b8d272 100755
> --- a/tools/perf/trace/beauty/arch_errno_names.sh
> +++ b/tools/perf/trace/beauty/arch_errno_names.sh
> @@ -57,7 +57,8 @@ create_arch_errno_table_func()
>  	archlist="$1"
>  	default="$2"
>  
> -	printf 'arch_syscalls__strerrno_t *arch_syscalls__strerrno_function(const char *arch)\n'
> +	printf 'static arch_syscalls__strerrno_t *\n'
> +	printf 'arch_syscalls__strerrno_function(const char *arch)\n'
>  	printf '{\n'
>  	for arch in $archlist; do
>  		arch_str=$(arch_string "$arch")
> diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c
> index ccb464026642..e58f56412fbb 100644
> --- a/tools/perf/util/env.c
> +++ b/tools/perf/util/env.c
> @@ -470,6 +470,10 @@ const char *perf_env__arch(struct perf_env *env)
>  	return normalize_arch(arch_name);
>  }
>  
> +#if defined(HAVE_SYSCALL_TABLE_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
> +#include "trace/beauty/arch_errno_names.c"
> +#endif
> +
>  const char *perf_env__arch_strerrno(struct perf_env *env __maybe_unused, int err __maybe_unused)
>  {
>  #if defined(HAVE_SYSCALL_TABLE_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
> diff --git a/tools/perf/util/env.h b/tools/perf/util/env.h
> index ae604c4edbb7..e9db89395dab 100644
> --- a/tools/perf/util/env.h
> +++ b/tools/perf/util/env.h
> @@ -56,8 +56,6 @@ struct pmu_caps {
>  
>  typedef const char *(arch_syscalls__strerrno_t)(int err);
>  
> -arch_syscalls__strerrno_t *arch_syscalls__strerrno_function(const char *arch);
> -
>  struct perf_env {
>  	char			*hostname;
>  	char			*os_release;
> diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
> index 77e02fcc51dd..35d84a96dbec 100644
> --- a/tools/perf/util/python.c
> +++ b/tools/perf/util/python.c
> @@ -16,7 +16,6 @@
>  #include "thread_map.h"
>  #include "trace-event.h"
>  #include "mmap.h"
> -#include "util/env.h"
>  #include "util/kwork.h"
>  #include "util/sample.h"
>  #include "util/lock-contention.h"
> @@ -1305,11 +1304,6 @@ PyMODINIT_FUNC PyInit_perf(void)
>  /* The following are stubs to avoid dragging in builtin-* objects. */
>  /* TODO: move the code out of the builtin-* file into util. */
>  
> -arch_syscalls__strerrno_t *arch_syscalls__strerrno_function(const char *arch __maybe_unused)
> -{
> -	return NULL;
> -}
> -
>  struct kwork_work *perf_kwork_add_work(struct perf_kwork *kwork __maybe_unused,
>  				       struct kwork_class *class __maybe_unused,
>  				       struct kwork_work *key  __maybe_unused)
> -- 
> 2.47.0.163.g1226f6d8fa-goog
>