Commit 0abff462 authored by Levi Zim's avatar Levi Zim Committed by Andrii Nakryiko
Browse files

bpf: Add comment about helper freeze 



Put a comment after the bpf helper list in uapi bpf.h to prevent people
from trying to add new helpers there and direct them to kfuncs.

Suggested-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Signed-off-by: default avatarLevi Zim <rsworktech@outlook.com>
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Reviewed-by: default avatarBagas Sanjaya <bagasdotme@gmail.com>
Acked-by: default avatarDaniel Xu <dxu@dxuuu.xyz>
Link: https://lore.kernel.org/bpf/CAEf4BzZvQF+QQ=oip4vdz5A=9bd+OmN-CXk5YARYieaipK9s+A@mail.gmail.com/
Link: https://lore.kernel.org/bpf/20221231004213.h5fx3loccbs5hyzu@macbook-pro-6.dhcp.thefacebook.com/
Link: https://lore.kernel.org/bpf/20250204-bpf-helper-freeze-v1-1-46efd9ff20dc@outlook.com
parent 94f53edc

include/uapi/linux/bpf.h

+4 −1
Original line number Diff line number Diff line
@@ -6019,7 +6019,10 @@ union bpf_attr { 
	FN(user_ringbuf_drain, 209, ##ctx)		\

	FN(cgrp_storage_get, 210, ##ctx)		\

	FN(cgrp_storage_delete, 211, ##ctx)		\

	/* */

	/* This helper list is effectively frozen. If you are trying to	\

	 * add a new helper, you should add a kfunc instead which has	\

	 * less stability guarantees. See Documentation/bpf/kfuncs.rst	\

	 */



/* backwards-compatibility macros for users of __BPF_FUNC_MAPPER that don't

 * know or care about integer value that is now passed as second argument