The constant for the critical path annotation function itself is still used in gem5 along with the M5OP_RESERVED opcodes to signal unimplemented functions. Change-Id: I71c7a56d0346f8aafe23e733a1eea703dda1af92 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/27222 Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>