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[NET]: Add const markers to various variables.

Browse source 
the patch below marks various variables const in net/; the goal is to
move them to the .rodata section so that they can't false-share
cachelines with things that get written to, as well as potentially
helping gcc a bit with optimisations.  (these were found using a gcc
patch to warn about such variables)

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arjan van de Ven 2005-11-29 16:21:38 -08:00 committed by David S. Miller
parent fb29644994
commit 9b5b5cff9a
19 changed files with 29 additions and 29 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
net/ipv4/fib_hash.c
View file

@ -975,7 +975,7 @@ static void fib_seq_stop(struct seq_file *seq, void *v)
static unsigned fib_flag_trans(int type, u32 mask, struct fib_info *fi)
{
static unsigned type2flags[RTN_MAX + 1] = {
static const unsigned type2flags[RTN_MAX + 1] = {
[7] = RTF_REJECT, [8] = RTF_REJECT,
};
unsigned flags = type2flags[type];

2
net/ipv4/fib_semantics.c
View file

@ -83,7 +83,7 @@ for (nhsel=0; nhsel < 1; nhsel++)
#define endfor_nexthops(fi) }
static struct
static const struct
{
int error;
u8 scope;

4
net/ipv4/icmp.c
View file

@ -220,7 +220,7 @@ struct icmp_control {
short error; /* This ICMP is classed as an error message */
};
static struct icmp_control icmp_pointers[NR_ICMP_TYPES+1];
static const struct icmp_control icmp_pointers[NR_ICMP_TYPES+1];
/*
* The ICMP socket(s). This is the most convenient way to flow control
@ -994,7 +994,7 @@ error:
/*
* This table is the definition of how we handle ICMP.
*/
static struct icmp_control icmp_pointers[NR_ICMP_TYPES + 1] = {
static const struct icmp_control icmp_pointers[NR_ICMP_TYPES + 1] = {
[ICMP_ECHOREPLY] = {
.output_entry = ICMP_MIB_OUTECHOREPS,
.input_entry = ICMP_MIB_INECHOREPS,

2
net/ipv4/ipvs/ip_vs_conn.c
View file

@ -771,7 +771,7 @@ static inline int todrop_entry(struct ip_vs_conn *cp)
* The drop rate array needs tuning for real environments.
* Called from timer bh only => no locking
*/
static char todrop_rate[9] = {0, 1, 2, 3, 4, 5, 6, 7, 8};
static const char todrop_rate[9] = {0, 1, 2, 3, 4, 5, 6, 7, 8};
static char todrop_counter[9] = {0};
int i;

4
net/ipv4/ipvs/ip_vs_ctl.c
View file

@ -1909,7 +1909,7 @@ static int ip_vs_set_timeout(struct ip_vs_timeout_user *u)
#define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user))
#define MAX_ARG_LEN SVCDEST_ARG_LEN
static unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = {
static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = {
[SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN,
[SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN,
[SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN,
@ -2180,7 +2180,7 @@ __ip_vs_get_timeouts(struct ip_vs_timeout_user *u)
#define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
#define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2)
static unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = {
static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = {
[GET_CMDID(IP_VS_SO_GET_VERSION)] = 64,
[GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN,
[GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN,

2
net/ipv4/ipvs/ip_vs_proto_tcp.c
View file

@ -251,7 +251,7 @@ tcp_csum_check(struct sk_buff *skb, struct ip_vs_protocol *pp)
#define TCP_DIR_OUTPUT 4
#define TCP_DIR_INPUT_ONLY 8
static int tcp_state_off[IP_VS_DIR_LAST] = {
static const int tcp_state_off[IP_VS_DIR_LAST] = {
[IP_VS_DIR_INPUT] = TCP_DIR_INPUT,
[IP_VS_DIR_OUTPUT] = TCP_DIR_OUTPUT,
[IP_VS_DIR_INPUT_ONLY] = TCP_DIR_INPUT_ONLY,

2
net/ipv4/netfilter/ip_conntrack_amanda.c
View file

@ -37,7 +37,7 @@ MODULE_LICENSE("GPL");
module_param(master_timeout, int, 0600);
MODULE_PARM_DESC(master_timeout, "timeout for the master connection");
static char *conns[] = { "DATA ", "MESG ", "INDEX " };
static const char *conns[] = { "DATA ", "MESG ", "INDEX " };
/* This is slow, but it's simple. --RR */
static char *amanda_buffer;

2
net/ipv4/netfilter/ip_conntrack_ftp.c
View file

@ -55,7 +55,7 @@ static int try_rfc959(const char *, size_t, u_int32_t [], char);
static int try_eprt(const char *, size_t, u_int32_t [], char);
static int try_epsv_response(const char *, size_t, u_int32_t [], char);
static struct ftp_search {
static const struct ftp_search {
enum ip_conntrack_dir dir;
const char *pattern;
size_t plen;

2
net/ipv4/netfilter/ip_conntrack_irc.c
View file

@ -59,7 +59,7 @@ MODULE_PARM_DESC(max_dcc_channels, "max number of expected DCC channels per IRC
module_param(dcc_timeout, int, 0400);
MODULE_PARM_DESC(dcc_timeout, "timeout on for unestablished DCC channels");
static char *dccprotos[] = { "SEND ", "CHAT ", "MOVE ", "TSEND ", "SCHAT " };
static const char *dccprotos[] = { "SEND ", "CHAT ", "MOVE ", "TSEND ", "SCHAT " };
#define MINMATCHLEN 5
#if 0

4
net/ipv4/netfilter/ip_conntrack_proto_icmp.c
View file

@ -51,7 +51,7 @@ static int icmp_invert_tuple(struct ip_conntrack_tuple *tuple,
const struct ip_conntrack_tuple *orig)
{
/* Add 1; spaces filled with 0. */
static u_int8_t invmap[]
static const u_int8_t invmap[]
= { [ICMP_ECHO] = ICMP_ECHOREPLY + 1,
[ICMP_ECHOREPLY] = ICMP_ECHO + 1,
[ICMP_TIMESTAMP] = ICMP_TIMESTAMPREPLY + 1,
@ -110,7 +110,7 @@ static int icmp_packet(struct ip_conntrack *ct,
return NF_ACCEPT;
}
static u_int8_t valid_new[] = {
static const u_int8_t valid_new[] = {
[ICMP_ECHO] = 1,
[ICMP_TIMESTAMP] = 1,
[ICMP_INFO_REQUEST] = 1,

4
net/ipv4/netfilter/ip_conntrack_proto_sctp.c
View file

@ -65,7 +65,7 @@ static unsigned long ip_ct_sctp_timeout_shutdown_sent = 300 SECS / 1000;
static unsigned long ip_ct_sctp_timeout_shutdown_recd = 300 SECS / 1000;
static unsigned long ip_ct_sctp_timeout_shutdown_ack_sent = 3 SECS;
static unsigned long * sctp_timeouts[]
static const unsigned long * sctp_timeouts[]
= { NULL, /* SCTP_CONNTRACK_NONE */
&ip_ct_sctp_timeout_closed, /* SCTP_CONNTRACK_CLOSED */
&ip_ct_sctp_timeout_cookie_wait, /* SCTP_CONNTRACK_COOKIE_WAIT */
@ -118,7 +118,7 @@ cookie echoed to closed.
*/
/* SCTP conntrack state transitions */
static enum sctp_conntrack sctp_conntracks[2][9][SCTP_CONNTRACK_MAX] = {
static const enum sctp_conntrack sctp_conntracks[2][9][SCTP_CONNTRACK_MAX] = {
{
/* ORIGINAL */
/* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA */

6
net/ipv4/netfilter/ip_conntrack_proto_tcp.c
View file

@ -99,7 +99,7 @@ unsigned long ip_ct_tcp_timeout_close = 10 SECS;
to ~13-30min depending on RTO. */
unsigned long ip_ct_tcp_timeout_max_retrans = 5 MINS;
static unsigned long * tcp_timeouts[]
static const unsigned long * tcp_timeouts[]
= { NULL, /* TCP_CONNTRACK_NONE */
&ip_ct_tcp_timeout_syn_sent, /* TCP_CONNTRACK_SYN_SENT, */
&ip_ct_tcp_timeout_syn_recv, /* TCP_CONNTRACK_SYN_RECV, */
@ -170,7 +170,7 @@ enum tcp_bit_set {
* if they are invalid
* or we do not support the request (simultaneous open)
*/
static enum tcp_conntrack tcp_conntracks[2][6][TCP_CONNTRACK_MAX] = {
static const enum tcp_conntrack tcp_conntracks[2][6][TCP_CONNTRACK_MAX] = {
{
/* ORIGINAL */
/* sNO, sSS, sSR, sES, sFW, sCW, sLA, sTW, sCL, sLI */
@ -817,7 +817,7 @@ void ip_conntrack_tcp_update(struct sk_buff *skb,
#define TH_CWR 0x80
/* table of valid flag combinations - ECE and CWR are always valid */
static u8 tcp_valid_flags[(TH_FIN|TH_SYN|TH_RST|TH_PUSH|TH_ACK|TH_URG) + 1] =
static const u8 tcp_valid_flags[(TH_FIN|TH_SYN|TH_RST|TH_PUSH|TH_ACK|TH_URG) + 1] =
{
[TH_SYN] = 1,
[TH_SYN|TH_ACK] = 1,

2
net/ipv4/netfilter/ip_tables.c
View file

@ -1892,7 +1892,7 @@ static int ipt_get_matches(char *buffer, char **start, off_t offset, int length)
return pos;
}
static struct { char *name; get_info_t *get_info; } ipt_proc_entry[] =
static const struct { char *name; get_info_t *get_info; } ipt_proc_entry[] =
{ { "ip_tables_names", ipt_get_tables },
{ "ip_tables_targets", ipt_get_targets },
{ "ip_tables_matches", ipt_get_matches },

2
net/ipv4/netfilter/ipt_LOG.c
View file

@ -197,7 +197,7 @@ static void dump_packet(const struct nf_loginfo *info,
}
case IPPROTO_ICMP: {
struct icmphdr _icmph, *ich;
static size_t required_len[NR_ICMP_TYPES+1]
static const size_t required_len[NR_ICMP_TYPES+1]
= { [ICMP_ECHOREPLY] = 4,
[ICMP_DEST_UNREACH]
= 8 + sizeof(struct iphdr),

10
net/ipv4/proc.c
View file

@ -98,7 +98,7 @@ fold_field(void *mib[], int offt)
}
/* snmp items */
static struct snmp_mib snmp4_ipstats_list[] = {
static const struct snmp_mib snmp4_ipstats_list[] = {
SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
@ -119,7 +119,7 @@ static struct snmp_mib snmp4_ipstats_list[] = {
SNMP_MIB_SENTINEL
};
static struct snmp_mib snmp4_icmp_list[] = {
static const struct snmp_mib snmp4_icmp_list[] = {
SNMP_MIB_ITEM("InMsgs", ICMP_MIB_INMSGS),
SNMP_MIB_ITEM("InErrors", ICMP_MIB_INERRORS),
SNMP_MIB_ITEM("InDestUnreachs", ICMP_MIB_INDESTUNREACHS),
@ -149,7 +149,7 @@ static struct snmp_mib snmp4_icmp_list[] = {
SNMP_MIB_SENTINEL
};
static struct snmp_mib snmp4_tcp_list[] = {
static const struct snmp_mib snmp4_tcp_list[] = {
SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
@ -167,7 +167,7 @@ static struct snmp_mib snmp4_tcp_list[] = {
SNMP_MIB_SENTINEL
};
static struct snmp_mib snmp4_udp_list[] = {
static const struct snmp_mib snmp4_udp_list[] = {
SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
@ -175,7 +175,7 @@ static struct snmp_mib snmp4_udp_list[] = {
SNMP_MIB_SENTINEL
};
static struct snmp_mib snmp4_net_list[] = {
static const struct snmp_mib snmp4_net_list[] = {
SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),

2
net/ipv4/route.c
View file

@ -1371,7 +1371,7 @@ out: kfree_skb(skb);
* are needed for AMPRnet AX.25 paths.
*/
static unsigned short mtu_plateau[] =
static const unsigned short mtu_plateau[] =
{32000, 17914, 8166, 4352, 2002, 1492, 576, 296, 216, 128 };
static __inline__ unsigned short guess_mtu(unsigned short old_mtu)

2
net/ipv4/tcp.c
View file

@ -1413,7 +1413,7 @@ recv_urg:
* closed.
*/
static unsigned char new_state[16] = {
static const unsigned char new_state[16] = {
/* current state: new state: action: */
/* (Invalid) */ TCP_CLOSE,
/* TCP_ESTABLISHED */ TCP_FIN_WAIT1 | TCP_ACTION_FIN,

2
net/ipv6/icmp.c
View file

@ -751,7 +751,7 @@ void icmpv6_cleanup(void)
inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6);
}
static struct icmp6_err {
static const struct icmp6_err {
int err;
int fatal;
} tab_unreach[] = {

2
net/ipv6/netfilter/ip6_tables.c
View file

@ -1972,7 +1972,7 @@ static int ip6t_get_matches(char *buffer, char **start, off_t offset, int length
return pos;
}
static struct { char *name; get_info_t *get_info; } ip6t_proc_entry[] =
static const struct { char *name; get_info_t *get_info; } ip6t_proc_entry[] =
{ { "ip6_tables_names", ip6t_get_tables },
{ "ip6_tables_targets", ip6t_get_targets },
{ "ip6_tables_matches", ip6t_get_matches },