This informative review of what sounds like a very good book by philosopher Michael Hardimon (UC San Diego) begins on an odd note:

Back in 2011, a petition was launched urging the Philosophical Gourmet Report (PGR) to include Philosophy of Race as a specialty, in view of its being a "vibrant and important area of research" that "deserves full recognition [and] professional legitimacy." Seven years later, my latest search on PhilJobs turned up 22 faculty positions explicitly mentioning race in their preferred AOS or AOC, and, for what it's worth, Philosophy of Race is indeed a category of the PGR.

That a "petition" was launched in 2011 urging the PGR to add philosophy of race is news to me.  I had first asked the Advisory Board to consider adding philosophy of race a few years prior to that; it was voted down by the Board, not unreasonably.  But I did keep asking and it was finally approved by the Board, just as the Board had approved adding other specialty areas in prior years to reflect areas of growth in the discipline.  It is a bit shocking, I must admit, to learn that 22 jobs mention philosophy of race (far more than mention philosophy of law, or 19th-century Continental or medieval philosophy).  My guess is that departments looking to appoint racial and ethnic minorities to their faculties think this is a way to do so; I am skeptical that most departments, or most philosophers, really are that interested in the subject qua subject, notwithstanding the misleading impression cyberspace can give.  (For those who aren't interested on the merits, however, do read the review, to see what you're missing!)