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author | Paul E. McKenney <paulmck@kernel.org> | 2022-08-02 10:39:13 -0700 |
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committer | Alexei Starovoitov <ast@kernel.org> | 2022-08-04 13:17:24 -0700 |
commit | 8fcf19696a1bdbabb7774e8d063ee4af91833402 (patch) | |
tree | dd6cd205440b1070e2effb95368e1bf8241bd26c | |
parent | 62fc770d90ef5a92931deb477c384f82be122a18 (diff) | |
download | linux-stable-8fcf19696a1bdbabb7774e8d063ee4af91833402.tar.gz linux-stable-8fcf19696a1bdbabb7774e8d063ee4af91833402.tar.bz2 linux-stable-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>
-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. |