re: __atomic_test_and_set() and mips o32 - help wanted

FWIW, one problem with the RAS solution is that we disable RAS
on SMP mips kernels, and i'm not sure how it would be fixed..

someone else could totally implement a better solution -- my
goal is to keep mips working with newer GCC, and for something
that is only rarely used (so far, only GDB has triggered this,
though anything using modern C++ test_and_set() would also
trigger the same issue -- this is how GDB does), i'm not going
to worry about better myself.


.mrg.