* [PATCH] perf auxtrace: Avoid redundant NULL check in auxtrace_mmap_params__set_idx()
@ 2025-08-04 11:06 Gautam Menghani
2025-08-04 12:08 ` Adrian Hunter
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Gautam Menghani @ 2025-08-04 11:06 UTC (permalink / raw)
To: peterz, mingo, acme, namhyung, mark.rutland, alexander.shishkin,
jolsa, irogers, adrian.hunter, kan.liang
Cc: Gautam Menghani, linux-perf-users, linux-kernel
Since commit eead8a011477 ("libperf threadmap: Don't segv for index 0 for the
NULL 'struct perf_thread_map' pointer"), perf_thread_map__pid() can
check for a NULL map and return -1 if idx is 0. Cleanup
auxtrace_mmap_params__set_idx() and remove the redundant NULL check.
No functional change intended.
Signed-off-by: Gautam Menghani <gautam@linux.ibm.com>
---
tools/perf/util/auxtrace.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
index ebd32f1b8f12..5e437133c753 100644
--- a/tools/perf/util/auxtrace.c
+++ b/tools/perf/util/auxtrace.c
@@ -185,10 +185,7 @@ void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
if (per_cpu) {
mp->cpu = perf_cpu_map__cpu(evlist->core.all_cpus, idx);
- if (evlist->core.threads)
- mp->tid = perf_thread_map__pid(evlist->core.threads, 0);
- else
- mp->tid = -1;
+ mp->tid = perf_thread_map__pid(evlist->core.threads, 0);
} else {
mp->cpu.cpu = -1;
mp->tid = perf_thread_map__pid(evlist->core.threads, idx);
--
2.49.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] perf auxtrace: Avoid redundant NULL check in auxtrace_mmap_params__set_idx()
2025-08-04 11:06 [PATCH] perf auxtrace: Avoid redundant NULL check in auxtrace_mmap_params__set_idx() Gautam Menghani
@ 2025-08-04 12:08 ` Adrian Hunter
2025-08-08 11:14 ` Amit Machhiwal
2025-08-10 16:08 ` Aditya Bodkhe
2 siblings, 0 replies; 4+ messages in thread
From: Adrian Hunter @ 2025-08-04 12:08 UTC (permalink / raw)
To: Gautam Menghani, peterz, mingo, acme, namhyung, mark.rutland,
alexander.shishkin, jolsa, irogers, kan.liang
Cc: linux-perf-users, linux-kernel
On 04/08/2025 14:06, Gautam Menghani wrote:
> Since commit eead8a011477 ("libperf threadmap: Don't segv for index 0 for the
> NULL 'struct perf_thread_map' pointer"), perf_thread_map__pid() can
> check for a NULL map and return -1 if idx is 0. Cleanup
> auxtrace_mmap_params__set_idx() and remove the redundant NULL check.
>
> No functional change intended.
>
> Signed-off-by: Gautam Menghani <gautam@linux.ibm.com>
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
> ---
> tools/perf/util/auxtrace.c | 5 +----
> 1 file changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
> index ebd32f1b8f12..5e437133c753 100644
> --- a/tools/perf/util/auxtrace.c
> +++ b/tools/perf/util/auxtrace.c
> @@ -185,10 +185,7 @@ void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
>
> if (per_cpu) {
> mp->cpu = perf_cpu_map__cpu(evlist->core.all_cpus, idx);
> - if (evlist->core.threads)
> - mp->tid = perf_thread_map__pid(evlist->core.threads, 0);
> - else
> - mp->tid = -1;
> + mp->tid = perf_thread_map__pid(evlist->core.threads, 0);
> } else {
> mp->cpu.cpu = -1;
> mp->tid = perf_thread_map__pid(evlist->core.threads, idx);
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] perf auxtrace: Avoid redundant NULL check in auxtrace_mmap_params__set_idx()
2025-08-04 11:06 [PATCH] perf auxtrace: Avoid redundant NULL check in auxtrace_mmap_params__set_idx() Gautam Menghani
2025-08-04 12:08 ` Adrian Hunter
@ 2025-08-08 11:14 ` Amit Machhiwal
2025-08-10 16:08 ` Aditya Bodkhe
2 siblings, 0 replies; 4+ messages in thread
From: Amit Machhiwal @ 2025-08-08 11:14 UTC (permalink / raw)
To: Gautam Menghani
Cc: peterz, mingo, acme, namhyung, mark.rutland, alexander.shishkin,
jolsa, irogers, adrian.hunter, kan.liang, linux-perf-users,
linux-kernel
On 2025/08/04 04:36 PM, Gautam Menghani wrote:
> Since commit eead8a011477 ("libperf threadmap: Don't segv for index 0 for the
> NULL 'struct perf_thread_map' pointer"), perf_thread_map__pid() can
> check for a NULL map and return -1 if idx is 0. Cleanup
> auxtrace_mmap_params__set_idx() and remove the redundant NULL check.
>
> No functional change intended.
>
> Signed-off-by: Gautam Menghani <gautam@linux.ibm.com>
LGTM.
Reviewed-by: Amit Machhiwal <amachhiw@linux.ibm.com>
Regards,
Amit
> ---
> tools/perf/util/auxtrace.c | 5 +----
> 1 file changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
> index ebd32f1b8f12..5e437133c753 100644
> --- a/tools/perf/util/auxtrace.c
> +++ b/tools/perf/util/auxtrace.c
> @@ -185,10 +185,7 @@ void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
>
> if (per_cpu) {
> mp->cpu = perf_cpu_map__cpu(evlist->core.all_cpus, idx);
> - if (evlist->core.threads)
> - mp->tid = perf_thread_map__pid(evlist->core.threads, 0);
> - else
> - mp->tid = -1;
> + mp->tid = perf_thread_map__pid(evlist->core.threads, 0);
> } else {
> mp->cpu.cpu = -1;
> mp->tid = perf_thread_map__pid(evlist->core.threads, idx);
> --
> 2.49.0
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] perf auxtrace: Avoid redundant NULL check in auxtrace_mmap_params__set_idx()
2025-08-04 11:06 [PATCH] perf auxtrace: Avoid redundant NULL check in auxtrace_mmap_params__set_idx() Gautam Menghani
2025-08-04 12:08 ` Adrian Hunter
2025-08-08 11:14 ` Amit Machhiwal
@ 2025-08-10 16:08 ` Aditya Bodkhe
2 siblings, 0 replies; 4+ messages in thread
From: Aditya Bodkhe @ 2025-08-10 16:08 UTC (permalink / raw)
To: Gautam Menghani, peterz, mingo, acme, namhyung, mark.rutland,
alexander.shishkin, jolsa, irogers, adrian.hunter, kan.liang
Cc: linux-perf-users, linux-kernel
On 04/08/25 4:36 pm, Gautam Menghani wrote:
> Since commit eead8a011477 ("libperf threadmap: Don't segv for index 0 for the
> NULL 'struct perf_thread_map' pointer"), perf_thread_map__pid() can
> check for a NULL map and return -1 if idx is 0. Cleanup
> auxtrace_mmap_params__set_idx() and remove the redundant NULL check.
>
> No functional change intended.
>
> Signed-off-by: Gautam Menghani <gautam@linux.ibm.com>
> ---
> tools/perf/util/auxtrace.c | 5 +----
> 1 file changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
> index ebd32f1b8f12..5e437133c753 100644
> --- a/tools/perf/util/auxtrace.c
> +++ b/tools/perf/util/auxtrace.c
> @@ -185,10 +185,7 @@ void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
>
> if (per_cpu) {
> mp->cpu = perf_cpu_map__cpu(evlist->core.all_cpus, idx);
> - if (evlist->core.threads)
> - mp->tid = perf_thread_map__pid(evlist->core.threads, 0);
> - else
> - mp->tid = -1;
> + mp->tid = perf_thread_map__pid(evlist->core.threads, 0);
> } else {
> mp->cpu.cpu = -1;
> mp->tid = perf_thread_map__pid(evlist->core.threads, idx);
LGTM.
Reviewed-by: Aditya Bodkhe <adityab1@linux.ibm.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
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2025-08-04 11:06 [PATCH] perf auxtrace: Avoid redundant NULL check in auxtrace_mmap_params__set_idx() Gautam Menghani
2025-08-04 12:08 ` Adrian Hunter
2025-08-08 11:14 ` Amit Machhiwal
2025-08-10 16:08 ` Aditya Bodkhe
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