bpf: Inline bpf_iter_num_next() kfunc

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bpf_iter_num_next() runs on every bpf_for() iteration, so inlining it
drops a call from the loop body. R1 points to the iterator; the returned
pointer to s->cur is R1 itself, since s->cur is first.

s->cur and s->end are int, so the kfunc's s->cur + 1 >= s->end is a
signed 32-bit compare and the inlined code needs no sign extension.

Signed-off-by: Puranjay Mohan <puranjay@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20260804134601.2305303-4-puranjay@kernel.org

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Puranjay Mohan 2026-08-04 06:45:55 -07:00 • committed by Andrii Nakryiko

parent f8f2b567d5

commit e933477048

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kernel/bpf/verifier.c

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