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'shift by register' operations are supported by eBPF interpreter, but were
accidently left out of x64 JIT compiler. Fix it and add a testcase.
Reported-by: Brendan Gregg <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Fixes: 622582786c ("net: filter: x86: internal BPF JIT")
Signed-off-by: David S. Miller <[email protected]>