simplify lm sensor alias removal

[David Gwynne]

i cant see why a task is necessary to defer the removal of iic
sensors that alias isa ones we find. we should be able to remove
the iic sensors directly.

i also dont have a box with this hardware in it, so i cant test.

anyone else willing to try?

Index: lm78_isa.c
===================================================================
RCS file: /cvs/src/sys/dev/isa/lm78_isa.c,v
retrieving revision 1.8
diff -u -p -r1.8 lm78_isa.c
--- lm78_isa.c  19 Dec 2014 13:53:08 -0000      1.8
+++ lm78_isa.c  1 Jan 2015 02:49:38 -0000
@@ -20,7 +20,6 @@
 #include <sys/systm.h>
 #include <sys/device.h>
 #include <sys/sensors.h>
-#include <sys/task.h>
 #include <machine/bus.h>
 
 #include <dev/isa/isareg.h>
@@ -42,7 +41,6 @@ extern struct cfdriver lm_cd;
 
 struct lm_isa_softc {
        struct lm_softc sc_lmsc;
-       struct task sc_remove_alias_task;
 
        bus_space_tag_t sc_iot;
        bus_space_handle_t sc_ioh;
@@ -53,7 +51,7 @@ int  lm_wbsio_match(struct device *, voi
 void lm_isa_attach(struct device *, struct device *, void *);
 u_int8_t lm_isa_readreg(struct lm_softc *, int);
 void lm_isa_writereg(struct lm_softc *, int, int);
-void lm_isa_remove_alias(void *, void *);
+void lm_isa_remove_alias(struct lm_softc *, const char *);
 
 struct cfattach lm_isa_ca = {
        sizeof(struct lm_isa_softc),
@@ -233,10 +231,7 @@ lm_isa_attach(struct device *parent, str
                        continue;
                if (lmsc && lmsc->sbusaddr == sbusaddr &&
                    lmsc->chipid == sc->sc_lmsc.chipid) {
-                       task_set(&sc->sc_remove_alias_task,
-                           lm_isa_remove_alias, lmsc,
-                           sc->sc_lmsc.sc_dev.dv_xname);
-                       task_add(systq, &sc->sc_remove_alias_task);
+                       lm_isa_remove_alias(lmsc, sc->sc_lmsc.sc_dev.dv_xname);
                        break;
                }
        }
@@ -244,14 +239,12 @@ lm_isa_attach(struct device *parent, str
 
 /* Remove sensors of the i2c alias, since we prefer to use the isa access */
 void
-lm_isa_remove_alias(void *v, void *arg)
+lm_isa_remove_alias(struct lm_softc *sc, const char *isa)
 {
-       struct lm_softc *sc = v;
-       char *iic = arg;
        int i;
 
        printf("%s: disabling sensors due to alias with %s\n",
-           sc->sc_dev.dv_xname, iic);
+           sc->sc_dev.dv_xname, isa);
        sensordev_deinstall(&sc->sensordev);
        for (i = 0; i < sc->numsensors; i++)
                sensor_detach(&sc->sensordev, &sc->sensors[i]);