[SPARC] {bbc_,}envctrl: Use call_usermodehelper().

We should not be calling kernel_execve() directly and this
causes module build failures because kernel_execve() is not
exported to modules.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/sbus/char/envctrl.c b/drivers/sbus/char/envctrl.c
index 6b6a855..fff4660 100644
--- a/drivers/sbus/char/envctrl.c
+++ b/drivers/sbus/char/envctrl.c
@@ -25,7 +25,7 @@
 #include <linux/delay.h>
 #include <linux/ioport.h>
 #include <linux/miscdevice.h>
-#include <linux/syscalls.h>
+#include <linux/kmod.h>
 
 #include <asm/ebus.h>
 #include <asm/uaccess.h>
@@ -976,7 +976,7 @@
 
 	inprog = 1;
 	printk(KERN_CRIT "kenvctrld: WARNING: Shutting down the system now.\n");
-	ret = kernel_execve("/sbin/shutdown", argv, envp);
+	ret = call_usermodehelper("/sbin/shutdown", argv, envp, 0);
 	if (ret < 0) {
 		printk(KERN_CRIT "kenvctrld: WARNING: system shutdown failed!\n"); 
 		inprog = 0;  /* unlikely to succeed, but we could try again */