[PATCH] Make most file operations structs in fs/ const

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / socket.c

diff --git a/net/socket.c b/net/socket.c
index e3c21d5ec2885aa4fea17eea23621580c07a6fb7..fcd77eac0ccff184294eab4888e3ff61ad35d168 100644 (file)
--- a/net/socket.c
+++ b/net/socket.c
@@ -107,6 +107,10 @@ static unsigned int sock_poll(struct file *file,
                              struct poll_table_struct *wait);
 static long sock_ioctl(struct file *file,
                      unsigned int cmd, unsigned long arg);
+#ifdef CONFIG_COMPAT
+static long compat_sock_ioctl(struct file *file,
+                     unsigned int cmd, unsigned long arg);
+#endif
 static int sock_fasync(int fd, struct file *filp, int on);
 static ssize_t sock_readv(struct file *file, const struct iovec *vector,
                          unsigned long count, loff_t *ppos);
@@ -128,6 +132,9 @@ static struct file_operations socket_file_ops = {
        .aio_write =    sock_aio_write,
        .poll =         sock_poll,
        .unlocked_ioctl = sock_ioctl,
+#ifdef CONFIG_COMPAT
+       .compat_ioctl = compat_sock_ioctl,
+#endif
        .mmap =         sock_mmap,
        .open =         sock_no_open,   /* special open code to disallow open via /proc */
        .release =      sock_close,
@@ -312,7 +319,8 @@ static int init_inodecache(void)
 {
        sock_inode_cachep = kmem_cache_create("sock_inode_cache",
                                sizeof(struct socket_alloc),
-                               0, SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT,
+                               0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
+                                       SLAB_MEM_SPREAD),
                                init_once, NULL);
        if (sock_inode_cachep == NULL)
                return -ENOMEM;
@@ -531,7 +539,7 @@ static int sock_no_open(struct inode *irrelevant, struct file *dontcare)
        return -ENXIO;
 }
 
-struct file_operations bad_sock_fops = {
+const struct file_operations bad_sock_fops = {
        .owner = THIS_MODULE,
        .open = sock_no_open,
 };
@@ -2136,6 +2144,20 @@ void socket_seq_show(struct seq_file *seq)
 }
 #endif /* CONFIG_PROC_FS */
 
+#ifdef CONFIG_COMPAT
+static long compat_sock_ioctl(struct file *file, unsigned cmd,
+                               unsigned long arg)
+{
+       struct socket *sock = file->private_data;
+       int ret = -ENOIOCTLCMD;
+
+       if (sock->ops->compat_ioctl)
+               ret = sock->ops->compat_ioctl(sock, cmd, arg);
+
+       return ret;
+}
+#endif
+
 /* ABI emulation layers need these two */
 EXPORT_SYMBOL(move_addr_to_kernel);
 EXPORT_SYMBOL(move_addr_to_user);