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From: "Paul E. McKenney" <paulmck@kernel.org>
To: bpf@vger.kernel.org, netdev@vger.kernel.org, linux-doc@vger.kernel.org
Cc: corbet@lwn.net, ast@kernel.org, daniel@iogearbox.net,
	andrii@kernel.org, kafai@fb.com, songliubraving@fb.com,
	yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org,
	kernel-team@fb.com, "Paul E. McKenney" <paulmck@kernel.org>
Subject: [PATCH v3 bpf 1/3] bpf: Update bpf_design_QA.rst to clarify that kprobes is not ABI
Date: Tue,  2 Aug 2022 10:39:11 -0700	[thread overview]
Message-ID: <20220802173913.4170192-1-paulmck@kernel.org> (raw)

This patch updates bpf_design_QA.rst to clarify that the ability to
attach a BPF program to a given point in the kernel code via kprobes
does not make that attachment point be part of the Linux kernel's ABI.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
 Documentation/bpf/bpf_design_QA.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/bpf/bpf_design_QA.rst b/Documentation/bpf/bpf_design_QA.rst
index 437de2a7a5de7..2ed9128cfbec8 100644
--- a/Documentation/bpf/bpf_design_QA.rst
+++ b/Documentation/bpf/bpf_design_QA.rst
@@ -214,6 +214,12 @@ A: NO. Tracepoints are tied to internal implementation details hence they are
 subject to change and can break with newer kernels. BPF programs need to change
 accordingly when this happens.
 
+Q: Are places where kprobes can attach part of the stable ABI?
+--------------------------------------------------------------
+A: NO. The places to which kprobes can attach are internal implementation
+details, which means that they are subject to change and can break with
+newer kernels. BPF programs need to change accordingly when this happens.
+
 Q: How much stack space a BPF program uses?
 -------------------------------------------
 A: Currently all program types are limited to 512 bytes of stack
-- 
2.31.1.189.g2e36527f23


                 reply	other threads:[~2022-08-02 17:39 UTC|newest]

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