- Implement selwakeuppri() which allows raising the priority of a

  thread being waken up.  The thread waken up can run at a priority as
  high as after tsleep().

- Replace selwakeup()s with selwakeuppri()s and pass appropriate
  priorities.

- Add cv_broadcastpri() which raises the priority of the broadcast
  threads.  Used by selwakeuppri() if collision occurs.

Not objected in:	-arch, -current

6 files changed, 6 insertions, 6 deletions

diff --git a/sys/i386/isa/asc.c b/sys/i386/isa/asc.c
index e304683..23a9801 100644
--- a/sys/i386/isa/asc.c
+++ b/sys/i386/isa/asc.c
@@ -525,7 +525,7 @@ ascintr(int unit)
 	    dma_restart(scu);
 	}
 	if (SEL_WAITING(&scu->selp)) {
-	    selwakeup(&scu->selp);
+	    selwakeuppri(&scu->selp, ASCPRI);
 	}
     }
 }
diff --git a/sys/i386/isa/cx.c b/sys/i386/isa/cx.c
index fd5b686..a2a4693 100644
--- a/sys/i386/isa/cx.c
+++ b/sys/i386/isa/cx.c
@@ -546,7 +546,7 @@ cxoproc (struct tty *tp)
 			tp->t_state &= ~TS_ASLEEP;
 			wakeup(TSA_OLOWAT(tp));
 		}
-		selwakeup(&tp->t_wsel);
+		selwakeuppri(&tp->t_wsel, TTOPRI);
 	}
 #endif
 	splx (s);
diff --git a/sys/i386/isa/istallion.c b/sys/i386/isa/istallion.c
index f9bea0c..7f27ad7 100644
--- a/sys/i386/isa/istallion.c
+++ b/sys/i386/isa/istallion.c
@@ -1709,7 +1709,7 @@ static void stli_start(struct tty *tp)
 			tp->t_state &= ~TS_ASLEEP;
 			wakeup(&tp->t_outq);
 		}
-		selwakeup(&tp->t_wsel);
+		selwakeuppri(&tp->t_wsel, TTOPRI);
 	}
 #endif
 
diff --git a/sys/i386/isa/mse.c b/sys/i386/isa/mse.c
index bb79f28..408bbf7 100644
--- a/sys/i386/isa/mse.c
+++ b/sys/i386/isa/mse.c
@@ -751,7 +751,7 @@ mseintr(arg)
 			sc->sc_flags &= ~MSESC_WANT;
 			wakeup(sc);
 		}
-		selwakeup(&sc->sc_selp);
+		selwakeuppri(&sc->sc_selp, MSEPRI);
 	}
 }
 
diff --git a/sys/i386/isa/spic.c b/sys/i386/isa/spic.c
index a0afcb9..93985e4 100644
--- a/sys/i386/isa/spic.c
+++ b/sys/i386/isa/spic.c
@@ -433,7 +433,7 @@ spictimeout(void *arg)
 			sc->sc_sleeping = 0;
 			wakeup( sc);
 		}
-		selwakeup(&sc->sc_rsel);
+		selwakeuppri(&sc->sc_rsel, PZERO);
 	}
 	spic_call2(sc, 0x81, 0xff); /* Clear event */
 
diff --git a/sys/i386/isa/stallion.c b/sys/i386/isa/stallion.c
index fb5b51f..54d186d 100644
--- a/sys/i386/isa/stallion.c
+++ b/sys/i386/isa/stallion.c
@@ -1234,7 +1234,7 @@ static void stl_start(struct tty *tp)
 			tp->t_state &= ~TS_ASLEEP;
 			wakeup(&tp->t_outq);
 		}
-		selwakeup(&tp->t_wsel);
+		selwakeuppri(&tp->t_wsel, TTOPRI);
 	}
 #endif