o net: save some more bytes in the kernel image moving global zero inits to .bss

net/core/link_watch.c

@@ -30,8 +30,8 @@ enum lw_bits {
 	LW_SE_USED
 };
 
-static unsigned long linkwatch_flags = 0;
-static unsigned long linkwatch_nextevent = 0;
+static unsigned long linkwatch_flags;
+static unsigned long linkwatch_nextevent;
 
 static void linkwatch_event(void *dummy);
 static DECLARE_WORK(linkwatch_work, linkwatch_event, NULL);

net/core/pktgen.c

@@ -198,8 +198,8 @@ static int debug;
 
 /* Module parameters, defaults. */
 static int count_d = 100000;
-static int ipg_d = 0;
-static int clone_skb_d = 0;
+static int ipg_d;
+static int clone_skb_d;
 
 
 #define MAX_PKTGEN 8
@@ -220,7 +220,7 @@ static inline __u64 getCurMs(void) {
 }
 
 #define PG_PROC_DIR "pktgen"
-static struct proc_dir_entry *proc_dir = 0;
+static struct proc_dir_entry *proc_dir;
 
 static struct net_device *setup_inject(struct pktgen_info* info)
 {

net/ipv4/ip_output.c

@@ -86,7 +86,7 @@
  *      Shall we try to damage output packets if routing dev changes?
  */
 
-int sysctl_ip_dynaddr = 0;
+int sysctl_ip_dynaddr;
 int sysctl_ip_default_ttl = IPDEFTTL;
 
 /* Generate a checksum for an outgoing IP datagram. */

net/ipv4/tcp_input.c

@@ -78,16 +78,16 @@ int sysctl_tcp_reordering = TCP_FASTRETRANS_THRESH;
 #ifdef CONFIG_INET_ECN
 int sysctl_tcp_ecn = 1;
 #else
-int sysctl_tcp_ecn = 0;
+int sysctl_tcp_ecn;
 #endif
 int sysctl_tcp_dsack = 1;
 int sysctl_tcp_app_win = 31;
 int sysctl_tcp_adv_win_scale = 2;
 
-int sysctl_tcp_stdurg = 0;
-int sysctl_tcp_rfc1337 = 0;
+int sysctl_tcp_stdurg;
+int sysctl_tcp_rfc1337;
 int sysctl_tcp_max_orphans = NR_FILE;
-int sysctl_tcp_frto = 0;
+int sysctl_tcp_frto;
 
 #define FLAG_DATA		0x01 /* Incoming frame contained data.		*/
 #define FLAG_WIN_UPDATE		0x02 /* Incoming ACK was a window update.	*/

net/ipv4/tcp_minisocks.c

@@ -33,11 +33,11 @@
 #define SYNC_INIT 1
 #endif
 
-int sysctl_tcp_tw_recycle = 0;
+int sysctl_tcp_tw_recycle;
 int sysctl_tcp_max_tw_buckets = NR_FILE*2;
 
 int sysctl_tcp_syncookies = SYNC_INIT; 
-int sysctl_tcp_abort_on_overflow = 0;
+int sysctl_tcp_abort_on_overflow;
 
 static __inline__ int tcp_in_window(u32 seq, u32 end_seq, u32 s_win, u32 e_win)
 {
@@ -50,7 +50,7 @@ static __inline__ int tcp_in_window(u32 seq, u32 end_seq, u32 s_win, u32 e_win)
 
 /* New-style handling of TIME_WAIT sockets. */
 
-int tcp_tw_count = 0;
+int tcp_tw_count;
 
 
 /* Must be called with locally disabled BHs. */