Function drop_ixon_env

crates/kernel/src/ingress.rs:3682–3684

(_ixon_env: IxonEnv, _quiet: bool)

/// Opt-out for the parallel drop path: set `IX_SEQ_IXON_DROP=1` to fall back
/// to single-threaded `drop` for measurement comparisons.
#[cfg(not(target_arch = "riscv64"))]
fn seq_ixon_drop_enabled() -> bool {
  crate::env_var_os("IX_SEQ_IXON_DROP").is_some()
}

#[cfg(not(target_arch = "riscv64"))]