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 <alexei.starovoitov@xxxxxxxxx> Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx> --- Documentation/bpf/bpf_design_QA.rst | 7 +++++++ 1 file changed, 7 insertions(+) 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. -- 2.31.1.189.g2e36527f23
