Credit: Kevin Mazur/

How is Lil Wayne keeping busy behind bars?

"Wayne has a job -- they got him on suicide watch for other prisoners," his ex, BET reality star Antonia "Toya" Johnson, told Us' Ian Drew (read his blog!) during an office visit Tuesday. "He watches the crazy prisoners and makes sure they don't kill themselves. He likes the job even though they don't pay him much."

Among the general population of inmates at New York's Rikers Island, the rapper (real name: Dwayne Michael Carter Jr.) -- who is serving a yearlong jail sentence for gun possession -- "is doing OK," added Johnson, who has a 11-year-old daughter with Wayne. "He is getting along with everybody."

Luckily, she told Us, "He didn't have to cut his long hair!"