linux-kernel - aarch64 missing from Revert "perf/x86: Always store regs->ip in perf_callchain

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Message-ID: <a38fed68-67bc-98ce-8e12-743342121ae3@oracle.com>
Date: Mon, 12 Jan 2026 01:17:53 -0500
From: Eugene Loh <eugene.loh@...cle.com>
To: jolsa@...nel.org
Cc: song@...nel.org, ast@...nel.org, rostedt@...dmis.org,
        linux-kernel@...r.kernel.org, Kris Van Hees <kris.van.hees@...cle.com>
Subject: aarch64 missing from Revert "perf/x86: Always store regs->ip in
 perf_callchain_kernel()"

Thanks for reverting that patch:
https://lore.kernel.org/r/20251104215405.168643-2-jolsa@kernel.org
https://github.com/torvalds/linux/commit/6d08340d1e354787d6c65a8c3cdd4d41ffb8a5ed
     Revert "perf/x86: Always store regs->ip in perf_callchain_kernel()"
     This reverts commit 83f44ae.

But it seems to me that this issue is not specific to x86.  For example, 
here is aarch64, using a 6.18 kernel:

     # bpftrace -e 'tracepoint:sched:sched_process_exec { 
print(kstack()); }'

         perf_trace_sched_process_exec+16
         perf_trace_sched_process_exec+16
         __traceiter_sched_process_exec+80
         exec_binprm+908
         bprm_execve.part.0+464
         bprm_execve+68
         do_execveat_common.isra.0+456
         __arm64_sys_execve+76
         invoke_syscall+112
         el0_svc_common.constprop.0+264
         do_el0_svc+36
         el0_svc+56
         el0t_64_sync_handler+184
         el0t_64_sync+412

The leaf IP is repeated.  Are corresponding changes needed for 
processors other than just x86?