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Message-ID: <aEiYOtKkrVDT03hZ@x1> Date: Tue, 10 Jun 2025 17:40:26 -0300 From: Arnaldo Carvalho de Melo <acme@...nel.org> To: linux-kernel@...r.kernel.org Cc: Adrian Hunter <adrian.hunter@...el.com>, Ian Rogers <irogers@...gle.com>, James Clark <james.clark@...aro.org>, Jiri Olsa <jolsa@...nel.org>, Kan Liang <kan.liang@...ux.intel.com>, Namhyung Kim <namhyung@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Sebastian Andrzej Siewior <bigeasy@...utronix.de> Subject: [PATCH 1/1 fyi] tools headers UAPI: Sync linux/prctl.h with the kernel sources to pick FUTEX knob tldr; Just FYI, I'm carrying this on the perf tools tree. Full explanation: There used to be no copies, with tools/ code using kernel headers directly. From time to time tools/perf/ broke due to legitimate kernel hacking. At some point Linus complained about such direct usage. Then we adopted the current model. See further details at: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/tools/include/uapi/README To pick the changes in: 63e8595c060a1fef ("futex: Allow to make the private hash immutable") 80367ad01d93ac78 ("futex: Add basic infrastructure for local task local hash") That adds a FUTEX knob: $ tools/perf/trace/beauty/prctl_option.sh > before $ cp include/uapi/linux/prctl.h tools/perf/trace/beauty/include/uapi/linux/prctl.h $ tools/perf/trace/beauty/prctl_option.sh > after $ diff -u before after --- before 2025-06-09 14:50:45.162579336 -0300 +++ after 2025-06-09 14:50:52.797660024 -0300 @@ -72,6 +72,7 @@ [75] = "SET_SHADOW_STACK_STATUS", [76] = "LOCK_SHADOW_STACK_STATUS", [77] = "TIMER_CREATE_RESTORE_IDS", + [78] = "FUTEX_HASH", }; static const char *prctl_set_mm_options[] = { [1] = "START_CODE", $ That now will be used to decode the syscall option and also to compose filters, for instance: [root@...e ~]# perf trace -e syscalls:sys_enter_prctl --filter option==SET_NAME 0.000 Isolated Servi/3474327 syscalls:sys_enter_prctl(option: SET_NAME, arg2: 0x7f23f13b7aee) 0.032 DOM Worker/3474327 syscalls:sys_enter_prctl(option: SET_NAME, arg2: 0x7f23deb25670) 7.920 :3474328/3474328 syscalls:sys_enter_prctl(option: SET_NAME, arg2: 0x7f23e24fbb10) 7.935 StreamT~s #374/3474328 syscalls:sys_enter_prctl(option: SET_NAME, arg2: 0x7f23e24fb970) 8.400 Isolated Servi/3474329 syscalls:sys_enter_prctl(option: SET_NAME, arg2: 0x7f23e24bab10) 8.418 StreamT~s #374/3474329 syscalls:sys_enter_prctl(option: SET_NAME, arg2: 0x7f23e24ba970) ^C[root@...e ~]# This addresses this perf build warning: Warning: Kernel ABI header differences: diff -u tools/include/uapi/linux/prctl.h include/uapi/linux/prctl.h Cc: Adrian Hunter <adrian.hunter@...el.com> Cc: Ian Rogers <irogers@...gle.com> Cc: James Clark <james.clark@...aro.org> Cc: Jiri Olsa <jolsa@...nel.org> Cc: Kan Liang <kan.liang@...ux.intel.com> Cc: Namhyung Kim <namhyung@...nel.org> Cc: Peter Zijlstra <peterz@...radead.org> Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de> Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com> --- tools/perf/trace/beauty/include/uapi/linux/prctl.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/tools/perf/trace/beauty/include/uapi/linux/prctl.h b/tools/perf/trace/beauty/include/uapi/linux/prctl.h index 15c18ef4eb11a013..43dec6eed559a686 100644 --- a/tools/perf/trace/beauty/include/uapi/linux/prctl.h +++ b/tools/perf/trace/beauty/include/uapi/linux/prctl.h @@ -364,4 +364,11 @@ struct prctl_mm_map { # define PR_TIMER_CREATE_RESTORE_IDS_ON 1 # define PR_TIMER_CREATE_RESTORE_IDS_GET 2 +/* FUTEX hash management */ +#define PR_FUTEX_HASH 78 +# define PR_FUTEX_HASH_SET_SLOTS 1 +# define FH_FLAG_IMMUTABLE (1ULL << 0) +# define PR_FUTEX_HASH_GET_SLOTS 2 +# define PR_FUTEX_HASH_GET_IMMUTABLE 3 + #endif /* _LINUX_PRCTL_H */ -- 2.49.0
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