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| author | Paul E. McKenney <paulmck@kernel.org> | 2022-08-02 19:39:13 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2022-08-04 22:17:24 +0200 |
| commit | 8fcf19696a1bdbabb7774e8d063ee4af91833402 (patch) | |
| tree | dd6cd205440b1070e2effb95368e1bf8241bd26c /Documentation/bpf | |
| parent | bpf: Update bpf_design_QA.rst to clarify that attaching to functions is not ABI (diff) | |
| download | linux-8fcf19696a1bdbabb7774e8d063ee4af91833402.tar.xz linux-8fcf19696a1bdbabb7774e8d063ee4af91833402.zip | |
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 <alexei.starovoitov@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Link: https://lore.kernel.org/r/20220802173913.4170192-3-paulmck@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'Documentation/bpf')
| -rw-r--r-- | Documentation/bpf/bpf_design_QA.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/bpf/bpf_design_QA.rst b/Documentation/bpf/bpf_design_QA.rst index a06ae8a828e3..a210b8a4df00 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. |