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Jakub Kicinski authored
Our implementation has restriction on stack pointers for function calls. Move the common checks into a helper for reuse. The state has to be encapsulated into a structure to support parameters other than BPF_REG_2. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Reviewed-by: Jiong Wang <jiong.wang@netronome.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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