- Rename rw_test_and_set to rw_cas, since most litterature uses the

  test_and_set name for some other operation, while cas is generally
  used for compare and set (cmpxchg in intel land, cas in sparc land).

- Make rw locks properly MP safe (provided that rw_cas is implemented
  in MD code). Most operations were MP safe except the sleep where we
  could have set the "I'm sleeping" flag before actually going to sleep
  so that the wakeup could miss us. Now, using the split tsleep,
  we first setup the sleep (put us on the sleep queues), then set
  the flag aborting the sleep if the lock has changed and then finally
  go to sleep.

miod@ ok (and he's been prodding me for days to get this in)

0 files changed, 0 insertions, 0 deletions