more of -Wall fixes from Cristian Ionescu-Idbohrn.

Some are fixing real bugs.

function                                             old     new   delta
syslogd_main                                         938     958     +20
get_signum                                           136     143      +7
obj_load                                             777     782      +5
recv_from_to                                         210     214      +4
get_next_block                                      1795    1799      +4
display_topmem_process_list                         1117    1121      +4
logread_main                                         484     487      +3
buffer_fill_and_print                                 73      76      +3
kill_main                                            687     689      +2
ll_remember_index                                    240     241      +1
do_stats                                             452     453      +1
if_readconf                                          166     165      -1
display_process_list                                1192    1191      -1
run_applet_and_exit                                  507     505      -2
print_signames                                        33      31      -2
parse_one_line                                      1092    1090      -2
find_out_spec                                         57      55      -2
add_ksymoops_symbols                                 421     419      -2
ash_main                                            1407    1402      -5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 11/8 up/down: 54/-17)            Total: 37 bytes

util-linux/fdisk_sun.c

@@ -230,8 +230,7 @@ static void
 create_sunlabel(void)
 {
 	struct hd_geometry geometry;
-	unsigned int ndiv;
-	int i;
+	unsigned ndiv;
 	unsigned char c;
 	const struct sun_predefined_drives *p = NULL;
 
@@ -241,6 +240,7 @@ create_sunlabel(void)
 	memset(MBRbuffer, 0, sizeof(MBRbuffer));
 	sunlabel->magic = SUN_SSWAP16(SUN_LABEL_MAGIC);
 	if (!floppy) {
+		unsigned i;
 		puts("Drive type\n"
 		 "   ?   auto configure\n"
 		 "   0   custom (with hardware detected defaults)");

util-linux/getopt.c

@@ -147,7 +147,7 @@ static const char *normalize(const char *arg)
 static int generate_output(char **argv, int argc, const char *optstr, const struct option *longopts)
 {
 	int exit_code = 0; /* We assume everything will be OK */
-	unsigned opt;
+	int opt;
 #if ENABLE_GETOPT_LONG
 	int longindex;
 #endif
@@ -173,7 +173,7 @@ static int generate_output(char **argv, int argc, const char *optstr, const stru
 #else
 			getopt(argc, argv, optstr);
 #endif
-		if (opt == EOF)
+		if (opt == -1)
 			break;
 		if (opt == '?' || opt == ':' )
 			exit_code = 1;
@@ -190,7 +190,7 @@ static int generate_output(char **argv, int argc, const char *optstr, const stru
 				printf(" %s", normalize(optarg));
 			else {
 				printf(" -%c", opt);
-				charptr = strchr(optstr,opt);
+				charptr = strchr(optstr, opt);
 				if (charptr != NULL && *++charptr == ':')
 					printf(" %s",
 						normalize(optarg ? optarg : ""));

util-linux/mount.c

@@ -307,7 +307,7 @@ static long parse_mount_options(char *options, char **unrecognized)
 
 	// Loop through options
 	for (;;) {
-		size_t i;
+		unsigned i;
 		char *comma = strchr(options, ',');
 		const char *option_str = mount_option_str;
 

util-linux/volume_id/unused_ufs.c

@@ -167,7 +167,7 @@ int volume_id_probe_ufs(struct volume_id *id, uint64_t off)
 	static const short offsets[] = { 0, 8, 64, 256 };
 
 	uint32_t magic;
-	int i;
+	unsigned i;
 	struct ufs_super_block *ufs;
 
 	dbg("probing at offset 0x%llx", (unsigned long long) off);

util-linux/volume_id/volume_id.c

@@ -152,7 +152,7 @@ static const probe_fptr fs2[] = {
 
 int volume_id_probe_all(struct volume_id *id, uint64_t off, uint64_t size)
 {
-	size_t i;
+	unsigned i;
 
 	if (id == NULL)
 		return -EINVAL;