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netdev: use const for some name functions

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dev_change_name and netdev_drivername should use const char on
parameters that are read-only input values. The strcpy to newname is
not needed since newname is not used later in function.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2008-09-30 02:22:14 -07:00 committed by David S. Miller
parent db4148da2c
commit cf04a4c764
2 changed files with 6 additions and 7 deletions
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4
include/linux/netdevice.h
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@ -1225,7 +1225,7 @@ extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
extern int dev_ethtool(struct net *net, struct ifreq *);
extern unsigned dev_get_flags(const struct net_device *);
extern int dev_change_flags(struct net_device *, unsigned);
extern int dev_change_name(struct net_device *, char *);
extern int dev_change_name(struct net_device *, const char *);
extern int dev_set_alias(struct net_device *, const char *, size_t);
extern int dev_change_net_namespace(struct net_device *,
struct net *, const char *);
@ -1670,7 +1670,7 @@ extern void dev_seq_stop(struct seq_file *seq, void *v);
extern int netdev_class_create_file(struct class_attribute *class_attr);
extern void netdev_class_remove_file(struct class_attribute *class_attr);
extern char *netdev_drivername(struct net_device *dev, char *buffer, int len);
extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
extern void linkwatch_run_queue(void);

9
net/core/dev.c
View File

@ -890,7 +890,7 @@ int dev_alloc_name(struct net_device *dev, const char *name)
* Change name of a device, can pass format strings "eth%d".
* for wildcarding.
*/
int dev_change_name(struct net_device *dev, char *newname)
int dev_change_name(struct net_device *dev, const char *newname)
{
char oldname[IFNAMSIZ];
int err = 0;
@ -916,7 +916,6 @@ int dev_change_name(struct net_device *dev, char *newname)
err = dev_alloc_name(dev, newname);
if (err < 0)
return err;
strcpy(newname, dev->name);
}
else if (__dev_get_by_name(net, newname))
return -EEXIST;
@ -4754,10 +4753,10 @@ err_name:
return -ENOMEM;
}
char *netdev_drivername(struct net_device *dev, char *buffer, int len)
char *netdev_drivername(const struct net_device *dev, char *buffer, int len)
{
struct device_driver *driver;
struct device *parent;
const struct device_driver *driver;
const struct device *parent;
if (len <= 0 || !buffer)
return buffer;