From: Paul E. McKenney Date: Tue, 2 Aug 2022 17:39:13 +0000 (-0700) Subject: bpf: Update bpf_design_QA.rst to clarify that BTF_ID does not ABIify a function X-Git-Tag: baikal/mips/sdk6.1~5042^2~14^2~10 X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=16d08d7e55d48b07617d2c2fcaf745812ee16dca;p=kernel.git bpf: Update bpf_design_QA.rst to clarify that BTF_ID does not ABIify a function This patch updates bpf_design_QA.rst to clarify that mentioning a function to the BTF_ID macro does not make that function become part of the Linux kernel's ABI. Suggested-by: Alexei Starovoitov Signed-off-by: Paul E. McKenney Link: https://lore.kernel.org/r/20220802173913.4170192-3-paulmck@kernel.org Signed-off-by: Alexei Starovoitov --- diff --git a/Documentation/bpf/bpf_design_QA.rst b/Documentation/bpf/bpf_design_QA.rst index a06ae8a828e3d..a210b8a4df005 100644 --- a/Documentation/bpf/bpf_design_QA.rst +++ b/Documentation/bpf/bpf_design_QA.rst @@ -291,3 +291,10 @@ The kernel function prototypes will change, and BPF programs attaching to them will need to change. The BPF compile-once-run-everywhere (CO-RE) should be used in order to make it easier to adapt your BPF programs to different versions of the kernel. + +Q: Marking a function with BTF_ID makes that function an ABI? +------------------------------------------------------------- +A: NO. + +The BTF_ID macro does not cause a function to become part of the ABI +any more than does the EXPORT_SYMBOL_GPL macro.