[PATCH] mark struct file_operations const 8

Many struct file_operations in the kernel can be "const".  Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data.  In addition it'll catch accidental writes at compile time to
these shared resources.
Signed-off-by: NArjan van de Ven <arjan@linux.intel.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

net/irda/ircomm/ircomm_core.c

@@ -56,7 +56,7 @@ static void ircomm_control_indication(struct ircomm_cb *self,
 extern struct proc_dir_entry *proc_irda;
 static int ircomm_seq_open(struct inode *, struct file *);
 
-static struct file_operations ircomm_proc_fops = {
+static const struct file_operations ircomm_proc_fops = {
 	.owner		= THIS_MODULE,
 	.open           = ircomm_seq_open,
 	.read           = seq_read,

net/irda/iriap.c

@@ -1080,7 +1080,7 @@ static int irias_seq_open(struct inode *inode, struct file *file)
 	return seq_open(file, &irias_seq_ops);
 }
 
-struct file_operations irias_seq_fops = {
+const struct file_operations irias_seq_fops = {
 	.owner		= THIS_MODULE,
 	.open           = irias_seq_open,
 	.read           = seq_read,

net/irda/irlan/irlan_common.c

@@ -93,7 +93,7 @@ extern struct proc_dir_entry *proc_irda;
 
 static int irlan_seq_open(struct inode *inode, struct file *file);
 
-static struct file_operations irlan_fops = {
+static const struct file_operations irlan_fops = {
 	.owner	 = THIS_MODULE,
 	.open    = irlan_seq_open,
 	.read    = seq_read,

net/irda/irlap.c

@@ -1244,7 +1244,7 @@ static int irlap_seq_open(struct inode *inode, struct file *file)
 	goto out;
 }
 
-struct file_operations irlap_seq_fops = {
+const struct file_operations irlap_seq_fops = {
 	.owner		= THIS_MODULE,
 	.open           = irlap_seq_open,
 	.read           = seq_read,

net/irda/irlmp.c

@@ -2026,7 +2026,7 @@ static int irlmp_seq_open(struct inode *inode, struct file *file)
 	goto out;
 }
 
-struct file_operations irlmp_seq_fops = {
+const struct file_operations irlmp_seq_fops = {
 	.owner		= THIS_MODULE,
 	.open           = irlmp_seq_open,
 	.read           = seq_read,

net/irda/irttp.c

@@ -1895,7 +1895,7 @@ static int irttp_seq_open(struct inode *inode, struct file *file)
 	goto out;
 }
 
-struct file_operations irttp_seq_fops = {
+const struct file_operations irttp_seq_fops = {
 	.owner		= THIS_MODULE,
 	.open           = irttp_seq_open,
 	.read           = seq_read,

net/llc/llc_proc.c

@@ -208,7 +208,7 @@ static int llc_seq_core_open(struct inode *inode, struct file *file)
 	return seq_open(file, &llc_seq_core_ops);
 }
 
-static struct file_operations llc_seq_socket_fops = {
+static const struct file_operations llc_seq_socket_fops = {
 	.owner		= THIS_MODULE,
 	.open		= llc_seq_socket_open,
 	.read		= seq_read,
@@ -216,7 +216,7 @@ static struct file_operations llc_seq_socket_fops = {
 	.release	= seq_release,
 };
 
-static struct file_operations llc_seq_core_fops = {
+static const struct file_operations llc_seq_core_fops = {
 	.owner		= THIS_MODULE,
 	.open		= llc_seq_core_open,
 	.read		= seq_read,

net/netfilter/nf_conntrack_expect.c

@@ -435,7 +435,7 @@ static int exp_open(struct inode *inode, struct file *file)
 	return seq_open(file, &exp_seq_ops);
 }
 
-struct file_operations exp_file_ops = {
+const struct file_operations exp_file_ops = {
 	.owner   = THIS_MODULE,
 	.open    = exp_open,
 	.read    = seq_read,

net/netfilter/nf_conntrack_standalone.c

@@ -229,7 +229,7 @@ static int ct_open(struct inode *inode, struct file *file)
 	return ret;
 }
 
-static struct file_operations ct_file_ops = {
+static const struct file_operations ct_file_ops = {
 	.owner   = THIS_MODULE,
 	.open    = ct_open,
 	.read    = seq_read,
@@ -317,7 +317,7 @@ static int ct_cpu_seq_open(struct inode *inode, struct file *file)
 	return seq_open(file, &ct_cpu_seq_ops);
 }
 
-static struct file_operations ct_cpu_seq_fops = {
+static const struct file_operations ct_cpu_seq_fops = {
 	.owner	 = THIS_MODULE,
 	.open	 = ct_cpu_seq_open,
 	.read	 = seq_read,

net/netfilter/nf_log.c

@@ -151,7 +151,7 @@ static int nflog_open(struct inode *inode, struct file *file)
 	return seq_open(file, &nflog_seq_ops);
 }
 
-static struct file_operations nflog_file_ops = {
+static const struct file_operations nflog_file_ops = {
 	.owner	 = THIS_MODULE,
 	.open	 = nflog_open,
 	.read	 = seq_read,

net/netfilter/nf_queue.c

@@ -331,7 +331,7 @@ static int nfqueue_open(struct inode *inode, struct file *file)
 	return seq_open(file, &nfqueue_seq_ops);
 }
 
-static struct file_operations nfqueue_file_ops = {
+static const struct file_operations nfqueue_file_ops = {
 	.owner	 = THIS_MODULE,
 	.open	 = nfqueue_open,
 	.read	 = seq_read,

net/netfilter/nfnetlink_log.c

@@ -1025,7 +1025,7 @@ static int nful_open(struct inode *inode, struct file *file)
 	return ret;
 }
 
-static struct file_operations nful_file_ops = {
+static const struct file_operations nful_file_ops = {
 	.owner	 = THIS_MODULE,
 	.open	 = nful_open,
 	.read	 = seq_read,

net/netfilter/nfnetlink_queue.c

@@ -1077,7 +1077,7 @@ static int nfqnl_open(struct inode *inode, struct file *file)
 	return ret;
 }
 
-static struct file_operations nfqnl_file_ops = {
+static const struct file_operations nfqnl_file_ops = {
 	.owner	 = THIS_MODULE,
 	.open	 = nfqnl_open,
 	.read	 = seq_read,

net/netfilter/x_tables.c

@@ -772,7 +772,7 @@ static int xt_tgt_open(struct inode *inode, struct file *file)
 	return ret;
 }
 
-static struct file_operations xt_file_ops = {
+static const struct file_operations xt_file_ops = {
 	.owner	 = THIS_MODULE,
 	.open	 = xt_tgt_open,
 	.read	 = seq_read,

net/netfilter/xt_hashlimit.c

@@ -37,7 +37,7 @@ MODULE_ALIAS("ip6t_hashlimit");
 /* need to declare this at the top */
 static struct proc_dir_entry *hashlimit_procdir4;
 static struct proc_dir_entry *hashlimit_procdir6;
-static struct file_operations dl_file_ops;
+static const struct file_operations dl_file_ops;
 
 /* hash table crap */
 struct dsthash_dst {
@@ -714,7 +714,7 @@ static int dl_proc_open(struct inode *inode, struct file *file)
 	return ret;
 }
 
-static struct file_operations dl_file_ops = {
+static const struct file_operations dl_file_ops = {
 	.owner   = THIS_MODULE,
 	.open    = dl_proc_open,
 	.read    = seq_read,

net/netlink/af_netlink.c

@@ -1713,7 +1713,7 @@ static int netlink_seq_open(struct inode *inode, struct file *file)
 	return 0;
 }
 
-static struct file_operations netlink_seq_fops = {
+static const struct file_operations netlink_seq_fops = {
 	.owner		= THIS_MODULE,
 	.open		= netlink_seq_open,
 	.read		= seq_read,

net/netrom/af_netrom.c

@@ -1335,7 +1335,7 @@ static int nr_info_open(struct inode *inode, struct file *file)
 	return seq_open(file, &nr_info_seqops);
 }
 
-static struct file_operations nr_info_fops = {
+static const struct file_operations nr_info_fops = {
 	.owner = THIS_MODULE,
 	.open = nr_info_open,
 	.read = seq_read,

net/netrom/nr_route.c

@@ -934,7 +934,7 @@ static int nr_node_info_open(struct inode *inode, struct file *file)
 	return seq_open(file, &nr_node_seqops);
 }
 
-struct file_operations nr_nodes_fops = {
+const struct file_operations nr_nodes_fops = {
 	.owner = THIS_MODULE,
 	.open = nr_node_info_open,
 	.read = seq_read,
@@ -1018,7 +1018,7 @@ static int nr_neigh_info_open(struct inode *inode, struct file *file)
 	return seq_open(file, &nr_neigh_seqops);
 }
 
-struct file_operations nr_neigh_fops = {
+const struct file_operations nr_neigh_fops = {
 	.owner = THIS_MODULE,
 	.open = nr_neigh_info_open,
 	.read = seq_read,

net/packet/af_packet.c

@@ -1952,7 +1952,7 @@ static int packet_seq_open(struct inode *inode, struct file *file)
 	return seq_open(file, &packet_seq_ops);
 }
 
-static struct file_operations packet_seq_fops = {
+static const struct file_operations packet_seq_fops = {
 	.owner		= THIS_MODULE,
 	.open		= packet_seq_open,
 	.read		= seq_read,

net/rose/af_rose.c

@@ -1440,7 +1440,7 @@ static int rose_info_open(struct inode *inode, struct file *file)
 	return seq_open(file, &rose_info_seqops);
 }
 
-static struct file_operations rose_info_fops = {
+static const struct file_operations rose_info_fops = {
 	.owner = THIS_MODULE,
 	.open = rose_info_open,
 	.read = seq_read,

net/rose/rose_route.c

@@ -1129,7 +1129,7 @@ static int rose_nodes_open(struct inode *inode, struct file *file)
 	return seq_open(file, &rose_node_seqops);
 }
 
-struct file_operations rose_nodes_fops = {
+const struct file_operations rose_nodes_fops = {
 	.owner = THIS_MODULE,
 	.open = rose_nodes_open,
 	.read = seq_read,
@@ -1211,7 +1211,7 @@ static int rose_neigh_open(struct inode *inode, struct file *file)
 	return seq_open(file, &rose_neigh_seqops);
 }
 
-struct file_operations rose_neigh_fops = {
+const struct file_operations rose_neigh_fops = {
 	.owner = THIS_MODULE,
 	.open = rose_neigh_open,
 	.read = seq_read,
@@ -1295,7 +1295,7 @@ static int rose_route_open(struct inode *inode, struct file *file)
 	return seq_open(file, &rose_route_seqops);
 }
 
-struct file_operations rose_routes_fops = {
+const struct file_operations rose_routes_fops = {
 	.owner = THIS_MODULE,
 	.open = rose_route_open,
 	.read = seq_read,

net/rxrpc/proc.c

@@ -37,7 +37,7 @@ static struct seq_operations rxrpc_proc_transports_ops = {
 	.show	= rxrpc_proc_transports_show,
 };
 
-static struct file_operations rxrpc_proc_transports_fops = {
+static const struct file_operations rxrpc_proc_transports_fops = {
 	.open		= rxrpc_proc_transports_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -57,7 +57,7 @@ static struct seq_operations rxrpc_proc_peers_ops = {
 	.show	= rxrpc_proc_peers_show,
 };
 
-static struct file_operations rxrpc_proc_peers_fops = {
+static const struct file_operations rxrpc_proc_peers_fops = {
 	.open		= rxrpc_proc_peers_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -77,7 +77,7 @@ static struct seq_operations rxrpc_proc_conns_ops = {
 	.show	= rxrpc_proc_conns_show,
 };
 
-static struct file_operations rxrpc_proc_conns_fops = {
+static const struct file_operations rxrpc_proc_conns_fops = {
 	.open		= rxrpc_proc_conns_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -97,7 +97,7 @@ static struct seq_operations rxrpc_proc_calls_ops = {
 	.show	= rxrpc_proc_calls_show,
 };
 
-static struct file_operations rxrpc_proc_calls_fops = {
+static const struct file_operations rxrpc_proc_calls_fops = {
 	.open		= rxrpc_proc_calls_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,

net/sched/sch_api.c

@@ -1194,7 +1194,7 @@ static int psched_open(struct inode *inode, struct file *file)
 	return single_open(file, psched_show, PDE(inode)->data);
 }
 
-static struct file_operations psched_fops = {
+static const struct file_operations psched_fops = {
 	.owner = THIS_MODULE,
 	.open = psched_open,
 	.read  = seq_read,

net/sctp/proc.c

@@ -114,7 +114,7 @@ static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
 	return single_open(file, sctp_snmp_seq_show, NULL);
 }
 
-static struct file_operations sctp_snmp_seq_fops = {
+static const struct file_operations sctp_snmp_seq_fops = {
 	.owner	 = THIS_MODULE,
 	.open	 = sctp_snmp_seq_open,
 	.read	 = seq_read,
@@ -264,7 +264,7 @@ static int sctp_eps_seq_open(struct inode *inode, struct file *file)
 	return seq_open(file, &sctp_eps_ops);
 }
 
-static struct file_operations sctp_eps_seq_fops = {
+static const struct file_operations sctp_eps_seq_fops = {
 	.open	 = sctp_eps_seq_open,
 	.read	 = seq_read,
 	.llseek	 = seq_lseek,
@@ -374,7 +374,7 @@ static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
 	return seq_open(file, &sctp_assoc_ops);
 }
 
-static struct file_operations sctp_assocs_seq_fops = {
+static const struct file_operations sctp_assocs_seq_fops = {
 	.open	 = sctp_assocs_seq_open,
 	.read	 = seq_read,
 	.llseek	 = seq_lseek,

net/socket.c

@@ -117,7 +117,7 @@ static ssize_t sock_sendpage(struct file *file, struct page *page,
  *	in the operation structures but are done directly via the socketcall() multiplexor.
  */
 
-static struct file_operations socket_file_ops = {
+static const struct file_operations socket_file_ops = {
 	.owner =	THIS_MODULE,
 	.llseek =	no_llseek,
 	.aio_read =	sock_aio_read,

net/sunrpc/cache.c

@@ -282,9 +282,9 @@ static DEFINE_SPINLOCK(cache_list_lock);
 static struct cache_detail *current_detail;
 static int current_index;
 
-static struct file_operations cache_file_operations;
-static struct file_operations content_file_operations;
-static struct file_operations cache_flush_operations;
+static const struct file_operations cache_file_operations;
+static const struct file_operations content_file_operations;
+static const struct file_operations cache_flush_operations;
 
 static void do_cache_clean(struct work_struct *work);
 static DECLARE_DELAYED_WORK(cache_cleaner, do_cache_clean);
@@ -887,7 +887,7 @@ cache_release(struct inode *inode, struct file *filp)
 
 
 
-static struct file_operations cache_file_operations = {
+static const struct file_operations cache_file_operations = {
 	.owner		= THIS_MODULE,
 	.llseek		= no_llseek,
 	.read		= cache_read,
@@ -1245,7 +1245,7 @@ static int content_release(struct inode *inode, struct file *file)
 	return seq_release(inode, file);
 }
 
-static struct file_operations content_file_operations = {
+static const struct file_operations content_file_operations = {
 	.open		= content_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -1297,7 +1297,7 @@ static ssize_t write_flush(struct file * file, const char __user * buf,
 	return count;
 }
 
-static struct file_operations cache_flush_operations = {
+static const struct file_operations cache_flush_operations = {
 	.open		= nonseekable_open,
 	.read		= read_flush,
 	.write		= write_flush,

net/sunrpc/rpc_pipe.c

@@ -309,7 +309,7 @@ rpc_pipe_ioctl(struct inode *ino, struct file *filp,
 	}
 }
 
-static struct file_operations rpc_pipe_fops = {
+static const struct file_operations rpc_pipe_fops = {
 	.owner		= THIS_MODULE,
 	.llseek		= no_llseek,
 	.read		= rpc_pipe_read,
@@ -366,7 +366,7 @@ rpc_info_release(struct inode *inode, struct file *file)
 	return single_release(inode, file);
 }
 
-static struct file_operations rpc_info_operations = {
+static const struct file_operations rpc_info_operations = {
 	.owner		= THIS_MODULE,
 	.open		= rpc_info_open,
 	.read		= seq_read,

net/sunrpc/stats.c

@@ -66,7 +66,7 @@ static int rpc_proc_open(struct inode *inode, struct file *file)
 	return single_open(file, rpc_proc_show, PDE(inode)->data);
 }
 
-static struct file_operations rpc_proc_fops = {
+static const struct file_operations rpc_proc_fops = {
 	.owner = THIS_MODULE,
 	.open = rpc_proc_open,
 	.read  = seq_read,

net/unix/af_unix.c

@@ -2040,7 +2040,7 @@ static int unix_seq_open(struct inode *inode, struct file *file)
 	goto out;
 }
 
-static struct file_operations unix_seq_fops = {
+static const struct file_operations unix_seq_fops = {
 	.owner		= THIS_MODULE,
 	.open		= unix_seq_open,
 	.read		= seq_read,

net/wanrouter/wanproc.c

@@ -188,7 +188,7 @@ static int status_open(struct inode *inode, struct file *file)
 	return seq_open(file, &status_op);
 }
 
-static struct file_operations config_fops = {
+static const struct file_operations config_fops = {
 	.owner	 = THIS_MODULE,
 	.open	 = config_open,
 	.read	 = seq_read,
@@ -196,7 +196,7 @@ static struct file_operations config_fops = {
 	.release = seq_release,
 };
 
-static struct file_operations status_fops = {
+static const struct file_operations status_fops = {
 	.owner	 = THIS_MODULE,
 	.open	 = status_open,
 	.read	 = seq_read,
@@ -271,7 +271,7 @@ static int wandev_open(struct inode *inode, struct file *file)
 	return single_open(file, wandev_show, PDE(inode)->data);
 }
 
-static struct file_operations wandev_fops = {
+static const struct file_operations wandev_fops = {
 	.owner	 = THIS_MODULE,
 	.open	 = wandev_open,
 	.read	 = seq_read,

net/x25/x25_proc.c

@@ -270,7 +270,7 @@ static int x25_seq_forward_open(struct inode *inode, struct file *file)
 	return seq_open(file, &x25_seq_forward_ops);
 }
 
-static struct file_operations x25_seq_socket_fops = {
+static const struct file_operations x25_seq_socket_fops = {
 	.owner		= THIS_MODULE,
 	.open		= x25_seq_socket_open,
 	.read		= seq_read,
@@ -278,7 +278,7 @@ static struct file_operations x25_seq_socket_fops = {
 	.release	= seq_release,
 };
 
-static struct file_operations x25_seq_route_fops = {
+static const struct file_operations x25_seq_route_fops = {
 	.owner		= THIS_MODULE,
 	.open		= x25_seq_route_open,
 	.read		= seq_read,