bpf: Simplify bpf_timer_cancel()

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Remove lock from the bpf_timer_cancel() helper. The lock does not
protect from concurrent modification of the bpf_async_cb data fields as
those are modified in the callback without locking.

Use guard(rcu)() instead of pair of explicit lock()/unlock().

Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Link: https://lore.kernel.org/r/20260120-timer_nolock-v6-4-670ffdd787b4@meta.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Mykyta Yatsenko 2026-01-20 15:59:13 +00:00 • committed by Alexei Starovoitov

parent 8bb1e32b3f

commit 83c9030cdc

1 changed files with 11 additions and 16 deletions

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kernel/bpf/helpers.c

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