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[PATCH] create a kstrdup library function 

This patch creates a new kstrdup library function and changes the "local"
implementations in several places to use this function.

Most of the changes come from the sound and net subsystems.  The sound part
had already been acknowledged by Takashi Iwai and the net part by David S.
Miller.

I left UML alone for now because I would need more time to read the code
carefully before making changes there.

Signed-off-by: Paulo Marques <pmarques@grupopie.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paulo Marques 2005-06-23 00:09:02 -07:00 committed by Linus Torvalds
parent 991114c6fa
commit 543537bd92
21 changed files with 75 additions and 94 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/md/dm-ioctl.c
View File

@ -122,14 +122,6 @@ static struct hash_cell *__get_uuid_cell(const char *str)
/*-----------------------------------------------------------------
* Inserting, removing and renaming a device.
*---------------------------------------------------------------*/
static inline char *kstrdup(const char *str)
{
char *r = kmalloc(strlen(str) + 1, GFP_KERNEL);
if (r)
strcpy(r, str);
return r;
}
static struct hash_cell *alloc_cell(const char *name, const char *uuid,
struct mapped_device *md)
{
@ -139,7 +131,7 @@ static struct hash_cell *alloc_cell(const char *name, const char *uuid,
if (!hc)
return NULL;
hc->name = kstrdup(name);
hc->name = kstrdup(name, GFP_KERNEL);
if (!hc->name) {
kfree(hc);
return NULL;
@ -149,7 +141,7 @@ static struct hash_cell *alloc_cell(const char *name, const char *uuid,
hc->uuid = NULL;
else {
hc->uuid = kstrdup(uuid);
hc->uuid = kstrdup(uuid, GFP_KERNEL);
if (!hc->uuid) {
kfree(hc->name);
kfree(hc);
@ -273,7 +265,7 @@ static int dm_hash_rename(const char *old, const char *new)
/*
* duplicate new.
*/
new_name = kstrdup(new);
new_name = kstrdup(new, GFP_KERNEL);
if (!new_name)
return -ENOMEM;

18
drivers/parport/probe.c
View File

@ -48,14 +48,6 @@ static void pretty_print(struct parport *port, int device)
printk("\n");
}
static char *strdup(char *str)
{
int n = strlen(str)+1;
char *s = kmalloc(n, GFP_KERNEL);
if (!s) return NULL;
return strcpy(s, str);
}
static void parse_data(struct parport *port, int device, char *str)
{
char *txt = kmalloc(strlen(str)+1, GFP_KERNEL);
@ -88,16 +80,16 @@ static void parse_data(struct parport *port, int device, char *str)
if (!strcmp(p, "MFG") || !strcmp(p, "MANUFACTURER")) {
if (info->mfr)
kfree (info->mfr);
info->mfr = strdup(sep);
info->mfr = kstrdup(sep, GFP_KERNEL);
} else if (!strcmp(p, "MDL") || !strcmp(p, "MODEL")) {
if (info->model)
kfree (info->model);
info->model = strdup(sep);
info->model = kstrdup(sep, GFP_KERNEL);
} else if (!strcmp(p, "CLS") || !strcmp(p, "CLASS")) {
int i;
if (info->class_name)
kfree (info->class_name);
info->class_name = strdup(sep);
info->class_name = kstrdup(sep, GFP_KERNEL);
for (u = sep; *u; u++)
*u = toupper(*u);
for (i = 0; classes[i].token; i++) {
@ -112,7 +104,7 @@ static void parse_data(struct parport *port, int device, char *str)
!strcmp(p, "COMMAND SET")) {
if (info->cmdset)
kfree (info->cmdset);
info->cmdset = strdup(sep);
info->cmdset = kstrdup(sep, GFP_KERNEL);
/* if it speaks printer language, it's
probably a printer */
if (strstr(sep, "PJL") || strstr(sep, "PCL"))
@ -120,7 +112,7 @@ static void parse_data(struct parport *port, int device, char *str)
} else if (!strcmp(p, "DES") || !strcmp(p, "DESCRIPTION")) {
if (info->description)
kfree (info->description);
info->description = strdup(sep);
info->description = kstrdup(sep, GFP_KERNEL);
}
}
rock_on:

4
include/linux/netdevice.h
View File

@ -925,10 +925,6 @@ extern int skb_checksum_help(struct sk_buff *skb, int inward);
extern void net_enable_timestamp(void);
extern void net_disable_timestamp(void);
#ifdef CONFIG_SYSCTL
extern char *net_sysctl_strdup(const char *s);
#endif
#endif /* __KERNEL__ */
#endif /* _LINUX_DEV_H */

2
include/linux/string.h
View File

@ -88,6 +88,8 @@ extern int memcmp(const void *,const void *,__kernel_size_t);
extern void * memchr(const void *,int,__kernel_size_t);
#endif
extern char *kstrdup(const char *s, int gfp);
#ifdef __cplusplus
}
#endif

3
include/sound/core.h
View File

@ -292,6 +292,7 @@ void *snd_hidden_kcalloc(size_t n, size_t size, int flags);
void snd_hidden_kfree(const void *obj);
void *snd_hidden_vmalloc(unsigned long size);
void snd_hidden_vfree(void *obj);
char *snd_hidden_kstrdup(const char *s, int flags);
#define kmalloc(size, flags) snd_hidden_kmalloc(size, flags)
#define kcalloc(n, size, flags) snd_hidden_kcalloc(n, size, flags)
#define kfree(obj) snd_hidden_kfree(obj)
@ -301,6 +302,7 @@ void snd_hidden_vfree(void *obj);
#define vmalloc_nocheck(size) snd_wrapper_vmalloc(size)
#define kfree_nocheck(obj) snd_wrapper_kfree(obj)
#define vfree_nocheck(obj) snd_wrapper_vfree(obj)
#define kstrdup(s, flags) snd_hidden_kstrdup(s, flags)
#else
#define snd_memory_init() /*NOP*/
#define snd_memory_done() /*NOP*/
@ -311,7 +313,6 @@ void snd_hidden_vfree(void *obj);
#define kfree_nocheck(obj) kfree(obj)
#define vfree_nocheck(obj) vfree(obj)
#endif
char *snd_kmalloc_strdup(const char *string, int flags);
int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count);
int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count);

24
mm/slab.c
View File

@ -92,6 +92,7 @@
#include <linux/sysctl.h>
#include <linux/module.h>
#include <linux/rcupdate.h>
#include <linux/string.h>
#include <asm/uaccess.h>
#include <asm/cacheflush.h>
@ -3082,3 +3083,26 @@ unsigned int ksize(const void *objp)
return size;
}
/*
* kstrdup - allocate space for and copy an existing string
*
* @s: the string to duplicate
* @gfp: the GFP mask used in the kmalloc() call when allocating memory
*/
char *kstrdup(const char *s, int gfp)
{
size_t len;
char *buf;
if (!s)
return NULL;
len = strlen(s) + 1;
buf = kmalloc(len, gfp);
if (buf)
memcpy(buf, s, len);
return buf;
}
EXPORT_SYMBOL(kstrdup);

3
net/core/neighbour.c
View File

@ -32,6 +32,7 @@
#include <net/sock.h>
#include <linux/rtnetlink.h>
#include <linux/random.h>
#include <linux/string.h>
#define NEIGH_DEBUG 1
@ -2592,7 +2593,7 @@ int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p,
t->neigh_vars[17].extra1 = dev;
}
dev_name = net_sysctl_strdup(dev_name_source);
dev_name = kstrdup(dev_name_source, GFP_KERNEL);
if (!dev_name) {
err = -ENOBUFS;
goto free;

15
net/core/sysctl_net_core.c
View File

@ -35,19 +35,6 @@ extern int sysctl_somaxconn;
extern char sysctl_divert_version[];
#endif /* CONFIG_NET_DIVERT */
/*
* This strdup() is used for creating copies of network
* device names to be handed over to sysctl.
*/
char *net_sysctl_strdup(const char *s)
{
char *rv = kmalloc(strlen(s)+1, GFP_KERNEL);
if (rv)
strcpy(rv, s);
return rv;
}
ctl_table core_table[] = {
#ifdef CONFIG_NET
{
@ -177,6 +164,4 @@ ctl_table core_table[] = {
{ .ctl_name = 0 }
};
EXPORT_SYMBOL(net_sysctl_strdup);
#endif

2
net/ipv4/devinet.c
View File

@ -1471,7 +1471,7 @@ static void devinet_sysctl_register(struct in_device *in_dev,
* by sysctl and we wouldn't want anyone to change it under our feet
* (see SIOCSIFNAME).
*/
dev_name = net_sysctl_strdup(dev_name);
dev_name = kstrdup(dev_name, GFP_KERNEL);
if (!dev_name)
goto free;

3
net/ipv6/addrconf.c
View File

@ -57,6 +57,7 @@
#endif
#include <linux/delay.h>
#include <linux/notifier.h>
#include <linux/string.h>
#include <net/sock.h>
#include <net/snmp.h>
@ -3437,7 +3438,7 @@ static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf
* by sysctl and we wouldn't want anyone to change it under our feet
* (see SIOCSIFNAME).
*/
dev_name = net_sysctl_strdup(dev_name);
dev_name = kstrdup(dev_name, GFP_KERNEL);
if (!dev_name)
goto free;

11
net/sunrpc/svcauth_unix.c
View File

@ -8,6 +8,7 @@
#include <linux/err.h>
#include <linux/seq_file.h>
#include <linux/hash.h>
#include <linux/string.h>
#define RPCDBG_FACILITY RPCDBG_AUTH
@ -20,14 +21,6 @@
*/
static char *strdup(char *s)
{
char *rv = kmalloc(strlen(s)+1, GFP_KERNEL);
if (rv)
strcpy(rv, s);
return rv;
}
struct unix_domain {
struct auth_domain h;
int addr_changes;
@ -55,7 +48,7 @@ struct auth_domain *unix_domain_find(char *name)
if (new == NULL)
return NULL;
cache_init(&new->h.h);
new->h.name = strdup(name);
new->h.name = kstrdup(name, GFP_KERNEL);
new->h.flavour = RPC_AUTH_UNIX;
new->addr_changes = 0;
new->h.h.expiry_time = NEVER;

3
sound/core/info.c
View File

@ -24,6 +24,7 @@
#include <linux/vmalloc.h>
#include <linux/time.h>
#include <linux/smp_lock.h>
#include <linux/string.h>
#include <sound/core.h>
#include <sound/minors.h>
#include <sound/info.h>
@ -754,7 +755,7 @@ static snd_info_entry_t *snd_info_create_entry(const char *name)
entry = kcalloc(1, sizeof(*entry), GFP_KERNEL);
if (entry == NULL)
return NULL;
entry->name = snd_kmalloc_strdup(name, GFP_KERNEL);
entry->name = kstrdup(name, GFP_KERNEL);
if (entry->name == NULL) {
kfree(entry);
return NULL;

3
sound/core/info_oss.c
View File

@ -22,6 +22,7 @@
#include <sound/driver.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/string.h>
#include <sound/core.h>
#include <sound/minors.h>
#include <sound/info.h>
@ -51,7 +52,7 @@ int snd_oss_info_register(int dev, int num, char *string)
x = NULL;
}
} else {
x = snd_kmalloc_strdup(string, GFP_KERNEL);
x = kstrdup(string, GFP_KERNEL);
if (x == NULL) {
up(&strings);
return -ENOMEM;

41
sound/core/memory.c
View File

@ -184,6 +184,20 @@ void snd_hidden_vfree(void *obj)
snd_wrapper_vfree(obj);
}
char *snd_hidden_kstrdup(const char *s, int flags)
{
int len;
char *buf;
if (!s) return NULL;
len = strlen(s) + 1;
buf = _snd_kmalloc(len, flags);
if (buf)
memcpy(buf, s, len);
return buf;
}
static void snd_memory_info_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer)
{
snd_iprintf(buffer, "kmalloc: %li bytes\n", snd_alloc_kmalloc);
@ -214,35 +228,8 @@ int __exit snd_memory_info_done(void)
return 0;
}
#else
#define _snd_kmalloc kmalloc
#endif /* CONFIG_SND_DEBUG_MEMORY */
/**
* snd_kmalloc_strdup - copy the string
* @string: the original string
* @flags: allocation conditions, GFP_XXX
*
* Allocates a memory chunk via kmalloc() and copies the string to it.
*
* Returns the pointer, or NULL if no enoguh memory.
*/
char *snd_kmalloc_strdup(const char *string, int flags)
{
size_t len;
char *ptr;
if (!string)
return NULL;
len = strlen(string) + 1;
ptr = _snd_kmalloc(len, flags);
if (ptr)
memcpy(ptr, string, len);
return ptr;
}
/**
* copy_to_user_fromio - copy data from mmio-space to user-space
* @dst: the destination pointer on user-space

3
sound/core/oss/mixer_oss.c
View File

@ -24,6 +24,7 @@
#include <linux/smp_lock.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/string.h>
#include <sound/core.h>
#include <sound/minors.h>
#include <sound/control.h>
@ -1137,7 +1138,7 @@ static void snd_mixer_oss_proc_write(snd_info_entry_t *entry,
goto __unlock;
}
tbl->oss_id = ch;
tbl->name = snd_kmalloc_strdup(str, GFP_KERNEL);
tbl->name = kstrdup(str, GFP_KERNEL);
if (! tbl->name) {
kfree(tbl);
goto __unlock;

3
sound/core/oss/pcm_oss.c
View File

@ -33,6 +33,7 @@
#include <linux/time.h>
#include <linux/vmalloc.h>
#include <linux/moduleparam.h>
#include <linux/string.h>
#include <sound/core.h>
#include <sound/minors.h>
#include <sound/pcm.h>
@ -2360,7 +2361,7 @@ static void snd_pcm_oss_proc_write(snd_info_entry_t *entry,
for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next);
setup1->next = setup;
}
template.task_name = snd_kmalloc_strdup(task_name, GFP_KERNEL);
template.task_name = kstrdup(task_name, GFP_KERNEL);
} else {
buffer->error = -ENOMEM;
}

2
sound/core/sound.c
View File

@ -399,8 +399,8 @@ EXPORT_SYMBOL(snd_hidden_kcalloc);
EXPORT_SYMBOL(snd_hidden_kfree);
EXPORT_SYMBOL(snd_hidden_vmalloc);
EXPORT_SYMBOL(snd_hidden_vfree);
EXPORT_SYMBOL(snd_hidden_kstrdup);
#endif
EXPORT_SYMBOL(snd_kmalloc_strdup);
EXPORT_SYMBOL(copy_to_user_fromio);
EXPORT_SYMBOL(copy_from_user_toio);
/* init.c */

3
sound/core/timer.c
View File

@ -26,6 +26,7 @@
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/moduleparam.h>
#include <linux/string.h>
#include <sound/core.h>
#include <sound/timer.h>
#include <sound/control.h>
@ -100,7 +101,7 @@ static snd_timer_instance_t *snd_timer_instance_new(char *owner, snd_timer_t *ti
timeri = kcalloc(1, sizeof(*timeri), GFP_KERNEL);
if (timeri == NULL)
return NULL;
timeri->owner = snd_kmalloc_strdup(owner, GFP_KERNEL);
timeri->owner = kstrdup(owner, GFP_KERNEL);
if (! timeri->owner) {
kfree(timeri);
return NULL;

7
sound/isa/gus/gus_mem.c
View File

@ -21,6 +21,7 @@
#include <sound/driver.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <sound/core.h>
#include <sound/gus.h>
#include <sound/info.h>
@ -213,7 +214,7 @@ snd_gf1_mem_block_t *snd_gf1_mem_alloc(snd_gf1_mem_t * alloc, int owner,
if (share_id != NULL)
memcpy(&block.share_id, share_id, sizeof(block.share_id));
block.owner = owner;
block.name = snd_kmalloc_strdup(name, GFP_KERNEL);
block.name = kstrdup(name, GFP_KERNEL);
nblock = snd_gf1_mem_xalloc(alloc, &block);
snd_gf1_mem_lock(alloc, 1);
return nblock;
@ -253,13 +254,13 @@ int snd_gf1_mem_init(snd_gus_card_t * gus)
if (gus->gf1.enh_mode) {
block.ptr = 0;
block.size = 1024;
block.name = snd_kmalloc_strdup("InterWave LFOs", GFP_KERNEL);
block.name = kstrdup("InterWave LFOs", GFP_KERNEL);
if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
return -ENOMEM;
}
block.ptr = gus->gf1.default_voice_address;
block.size = 4;
block.name = snd_kmalloc_strdup("Voice default (NULL's)", GFP_KERNEL);
block.name = kstrdup("Voice default (NULL's)", GFP_KERNEL);
if (snd_gf1_mem_xalloc(alloc, &block) == NULL)
return -ENOMEM;
#ifdef CONFIG_SND_DEBUG

2
sound/pci/hda/patch_realtek.c
View File

@ -1781,7 +1781,7 @@ static int add_control(struct alc_spec *spec, int type, const char *name, unsign
knew = &spec->kctl_alloc[spec->num_kctl_used];
*knew = alc880_control_templates[type];
knew->name = snd_kmalloc_strdup(name, GFP_KERNEL);
knew->name = kstrdup(name, GFP_KERNEL);
if (! knew->name)
return -ENOMEM;
knew->private_value = val;

3
sound/synth/emux/emux.c
View File

@ -22,6 +22,7 @@
#include <linux/wait.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <sound/core.h>
#include <sound/emux_synth.h>
#include <linux/init.h>
@ -76,7 +77,7 @@ int snd_emux_register(snd_emux_t *emu, snd_card_t *card, int index, char *name)
snd_assert(name != NULL, return -EINVAL);
emu->card = card;
emu->name = snd_kmalloc_strdup(name, GFP_KERNEL);
emu->name = kstrdup(name, GFP_KERNEL);
emu->voices = kcalloc(emu->max_voices, sizeof(snd_emux_voice_t), GFP_KERNEL);
if (emu->voices == NULL)
return -ENOMEM;