[AX25]: Use kmemdup

Code diff stats:

[acme@newtoy net-2.6.20]$ codiff /tmp/ax25.ko.before /tmp/ax25.ko.after
/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ax25/ax25_out.c:
  ax25_send_frame |   -8
 1 function changed, 8 bytes removed

/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ax25/ax25_route.c:
  ax25_rt_autobind |  -15
 1 function changed, 15 bytes removed

/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ax25/af_ax25.c:
  ax25_make_new |  -33
 1 function changed, 33 bytes removed

/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ax25/sysctl_net_ax25.c:
  ax25_register_sysctl |  -21
 1 function changed, 21 bytes removed

/tmp/ax25.ko.after:
 4 functions changed, 77 bytes removed
[acme@newtoy net-2.6.20]$

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>

4 files changed, 11 insertions, 9 deletions

diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index 000695c4858..6cabf6d8a75 100644
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -906,13 +906,13 @@ struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
         ax25->source_addr = oax25->source_addr;
 
         if (oax25->digipeat != NULL) {
-                if ((ax25->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL) {
+                ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
+                                         GFP_ATOMIC);
+                if (ax25->digipeat == NULL) {
                         sk_free(sk);
                         ax25_cb_put(ax25);
                         return NULL;
                 }
-
-                memcpy(ax25->digipeat, oax25->digipeat, sizeof(ax25_digi));
         }
 
         sk->sk_protinfo = ax25;
diff --git a/net/ax25/ax25_out.c b/net/ax25/ax25_out.c
index d7736e58533..f84047d1e8c 100644
--- a/net/ax25/ax25_out.c
+++ b/net/ax25/ax25_out.c
@@ -70,11 +70,11 @@ ax25_cb *ax25_send_frame(struct sk_buff *skb, int paclen, ax25_address *src, ax2
         ax25->dest_addr   = *dest;
 
         if (digi != NULL) {
-                if ((ax25->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL) {
+                ax25->digipeat = kmemdup(digi, sizeof(*digi), GFP_ATOMIC);
+                if (ax25->digipeat == NULL) {
                         ax25_cb_put(ax25);
                         return NULL;
                 }
-                memcpy(ax25->digipeat, digi, sizeof(ax25_digi));
         }
 
         switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
diff --git a/net/ax25/ax25_route.c b/net/ax25/ax25_route.c
index 51b7bdaf27e..8580356ace5 100644
--- a/net/ax25/ax25_route.c
+++ b/net/ax25/ax25_route.c
@@ -432,11 +432,12 @@ int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
         }
 
         if (ax25_rt->digipeat != NULL) {
-                if ((ax25->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL) {
+                ax25->digipeat = kmemdup(ax25_rt->digipeat, sizeof(ax25_digi),
+                                         GFP_ATOMIC);
+                if (ax25->digipeat == NULL) {
                         err = -ENOMEM;
                         goto put;
                 }
-                memcpy(ax25->digipeat, ax25_rt->digipeat, sizeof(ax25_digi));
                 ax25_adjust_path(addr, ax25->digipeat);
         }
 
diff --git a/net/ax25/sysctl_net_ax25.c b/net/ax25/sysctl_net_ax25.c
index 867d4253797..d23a27f25d2 100644
--- a/net/ax25/sysctl_net_ax25.c
+++ b/net/ax25/sysctl_net_ax25.c
@@ -209,7 +209,9 @@ void ax25_register_sysctl(void)
         }
 
         for (n = 0, ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) {
-                ctl_table *child = kmalloc(sizeof(ax25_param_table), GFP_ATOMIC);
+                struct ctl_table *child = kmemdup(ax25_param_table,
+                                                  sizeof(ax25_param_table),
+                                                  GFP_ATOMIC);
                 if (!child) {
                         while (n--)
                                 kfree(ax25_table[n].child);
@@ -217,7 +219,6 @@ void ax25_register_sysctl(void)
                         spin_unlock_bh(&ax25_dev_lock);
                         return;
                 }
-                memcpy(child, ax25_param_table, sizeof(ax25_param_table));
                 ax25_table[n].child = ax25_dev->systable = child;
                 ax25_table[n].ctl_name     = n + 1;
                 ax25_table[n].procname     = ax25_dev->dev->name;