Added "Fall through" comments to some switch statements where multiple

approaches are tried in order to prevent warnings from GCC 7 (and newer).

Added includes on Linux for sys/sysmacros.h as the old defines in
the sys/types.h file will be removed in the future.

src/consoles.c

@@ -33,6 +33,7 @@
 #  include <sys/vt.h>
 #  include <sys/kd.h>
 #  include <linux/serial.h>
+#include <sys/sysmacros.h>  
 #endif
 #include <fcntl.h>
 #include <dirent.h>

src/hddown.c

@@ -233,6 +233,7 @@ static int do_standby_disk(char *device, unsigned int flags)
 	case DISK_EXTFLUSH:
 		if ((ret = ioctl(fd, HDIO_DRIVE_CMD, &flush1)) == 0)
 			break;
+                /* Else Fall through */
 		/* Extend flush rejected, try standard flush */
 	default:
 		ret = ioctl(fd, HDIO_DRIVE_CMD, &flush2) &&

src/init.c

@@ -1318,6 +1318,7 @@ void startup(CHILD *ch)
 		case POWERFAIL:
 		case ONCE:
 			if (ch->flags & XECUTED) break;
+                        /* Fall through */
 		case ONDEMAND:
 		case RESPAWN:
   			ch->flags |= RUNNING;

src/killall5.c

@@ -653,6 +653,7 @@ int readproc(int do_stat)
 		case DO_NETFS:
 			if ((p->nfs = check4nfs(path, buf)))
 				goto link;
+                        /* else fall through */
 		case DO_STAT:
 			if (stat(path, &st) != 0) {
 				char * ptr;

src/shutdown.c

@@ -41,6 +41,9 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
+#ifdef __linux__
+#include <sys/sysmacros.h>   /* brought in my LFS patch */
+#endif
 #include <time.h>
 #include <string.h>
 #include <errno.h>

src/sulogin.c

@@ -32,6 +32,9 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
+#ifdef __linux__
+#include <sys/sysmacros.h> 
+#endif
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>