Remove unused assignment.

Found by:	clang static analyzer
Found by:	Coverity Prevent[tm] (CID 4537, 4538, 4539)

3 files changed, 0 insertions, 8 deletions

diff --git a/sys/dev/acpi_support/acpi_fujitsu.c b/sys/dev/acpi_support/acpi_fujitsu.c
index 6628135..c825254 100644
--- a/sys/dev/acpi_support/acpi_fujitsu.c
+++ b/sys/dev/acpi_support/acpi_fujitsu.c
@@ -380,7 +380,6 @@ acpi_fujitsu_init(struct acpi_fujitsu_softc *sc)
 	    OID_AUTO, "fujitsu", CTLFLAG_RD, 0, "");
 
 	for (i = 0; sysctl_table[i].name != NULL; i++) {
-		exists = 0;
 		switch(sysctl_table[i].method) {
 			case METHOD_GMOU:
 				exists = sc->gmou.exists;
@@ -566,9 +565,6 @@ static uint8_t
 acpi_fujitsu_check_hardware(struct acpi_fujitsu_softc *sc)
 {
 	int val;
-	struct acpi_softc *acpi_sc;
-
-	acpi_sc = acpi_device_get_parent_softc(sc->dev);
 
 	ACPI_SERIAL_ASSERT(fujitsu);
 	/* save the hotkey bitmask */
diff --git a/sys/dev/acpi_support/acpi_hp.c b/sys/dev/acpi_support/acpi_hp.c
index 83e4bf7..b0e85be 100644
--- a/sys/dev/acpi_support/acpi_hp.c
+++ b/sys/dev/acpi_support/acpi_hp.c
@@ -453,7 +453,6 @@ static int
 acpi_hp_attach(device_t dev)
 {
 	struct acpi_hp_softc	*sc;
-	struct acpi_softc	*acpi_sc;
 	devclass_t		wmi_devclass;
 	int			arg;
 
@@ -477,7 +476,6 @@ acpi_hp_attach(device_t dev)
 	sc->cmi_order_size = -1;
 	sc->verbose = 0;
 	memset(sc->cmi_order, 0, sizeof(sc->cmi_order));
-	acpi_sc = acpi_device_get_parent_softc(dev);
 
 	if (!(wmi_devclass = devclass_find ("acpi_wmi"))) {
 		device_printf(dev, "Couldn't find acpi_wmi devclass\n");
diff --git a/sys/dev/acpi_support/acpi_ibm.c b/sys/dev/acpi_support/acpi_ibm.c
index 2b6ac5d..380f976 100644
--- a/sys/dev/acpi_support/acpi_ibm.c
+++ b/sys/dev/acpi_support/acpi_ibm.c
@@ -743,8 +743,6 @@ acpi_ibm_sysctl_set(struct acpi_ibm_softc *sc, int method, int arg)
 			return (status);
 
 		if (sc->cmos_handle) {
-			val = val_ec & IBM_EC_MASK_VOL;
-
 			Args.Count = 1;
 			Args.Pointer = &Arg;
 			Arg.Type = ACPI_TYPE_INTEGER;