bpf: Rename 'early' BTF checking as a preparation phase

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BTF processing is split around subprogram discovery. The first phase gets
program BTF and imports func_info because a BTF-tagged exception callback
may not be referenced by any instruction. Subprogram discovery needs this
metadata to find it.

The later phase validates func_info and line_info against the complete
subprogram table and applies CO-RE relocations. This split breaks a real
dependency cycle rather than merely running the same checks early.

Rename bpf_check_btf_info_early() and check_btf_func_early() to preparation
names that reflect this role. Add short call-site comments to make the two
phases and their responsibilities clear.

No functional change is intended.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Reviewed-by: Amery Hung <ameryhung@gmail.com>
Link: https://patch.msgid.link/20260808003938.3486067-2-memxor@gmail.com
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>

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Kumar Kartikeya Dwivedi 2026-08-08 02:39:21 +02:00 • committed by Eduard Zingerman

parent 8b365b3c68

commit 04962afb3c

3 changed files with 12 additions and 10 deletions

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4

include/linux/bpf_verifier.h

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14

kernel/bpf/check_btf.c

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4

kernel/bpf/verifier.c

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