[PATCH] missing unlock_kernel

I discovered this while auditing a large part of the remaining
lock_kernel users in the 2.5.x tree.

kernel/sys.c

@@ -412,9 +412,10 @@ asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void * arg)
 
 #ifdef CONFIG_SOFTWARE_SUSPEND
 	case LINUX_REBOOT_CMD_SW_SUSPEND:
-		if(!software_suspend_enabled)
+		if (!software_suspend_enabled) {
+			unlock_kernel();
 			return -EAGAIN;
-		
+		}		
 		software_suspend();
 		do_exit(0);
 		break;