bpf: Avoid changing callchain in bpf_get_stack_pe

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There's no need to modify the trace object bpf_get_stack_pe, we just
need to pass the needed callchain length in separate argument.

This way we can have callchain pointers const and remove the trace->nr
modification and restoration.

Assisted-by: Codex:GPT-5.5

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20260803210149.296496-12-jolsa@kernel.org

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Jiri Olsa 2026-08-03 23:01:48 +02:00 • committed by Andrii Nakryiko

parent b1a47b2708

commit 347c1d722e

1 changed files with 15 additions and 21 deletions

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kernel/bpf/stackmap.c

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