Allow threads to atomically release rw and sx locks while waiting for an

event.  Locking primitives that support this (mtx, rw, and sx) now each
include their own foo_sleep() routine.
- Rename msleep() to _sleep() and change it's 'struct mtx' object to a
  'struct lock_object' pointer.  _sleep() uses the recently added
  lc_unlock() and lc_lock() function pointers for the lock class of the
  specified lock to release the lock while the thread is suspended.
- Add wrappers around _sleep() for mutexes (mtx_sleep()), rw locks
  (rw_sleep()), and sx locks (sx_sleep()).  msleep() still exists and
  is now identical to mtx_sleep(), but it is deprecated.
- Rename SLEEPQ_MSLEEP to SLEEPQ_SLEEP.
- Rewrite much of sleep.9 to not be msleep(9) centric.
- Flesh out the 'RETURN VALUES' section in sleep.9 and add an 'ERRORS'
  section.
- Add __nonnull(1) to _sleep() and msleep_spin() so that the compiler will
  warn if you try to pass a NULL wait channel.  The functions already have
  a KASSERT to that effect.

1 files changed, 2 insertions, 2 deletions

diff --git a/share/man/man9/thread_exit.9 b/share/man/man9/thread_exit.9
index 9dc8acb1b3cc..6a06433acebd 100644
--- a/share/man/man9/thread_exit.9
+++ b/share/man/man9/thread_exit.9
@@ -58,6 +58,6 @@ must be called with the
 mutex held.
 .Sh SEE ALSO
 .Xr mi_switch 9 ,
-.Xr msleep 9 ,
 .Xr mutex 9 ,
-.Xr runqueue 9
+.Xr runqueue 9 ,
+.Xr sleep 9