From: Paulo Marques <pmarques@grupopie.com>
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>
---
drivers/md/dm-ioctl.c | 14 +++-----------
drivers/parport/probe.c | 18 +++++-------------
include/linux/netdevice.h | 4 ----
include/linux/string.h | 2 ++
include/sound/core.h | 3 ++-
lib/string.c | 20 ++++++++++++++++++++
net/core/neighbour.c | 3 ++-
net/core/sysctl_net_core.c | 15 ---------------
net/ipv4/devinet.c | 2 +-
net/ipv6/addrconf.c | 3 ++-
net/sunrpc/svcauth_unix.c | 11 ++---------
sound/core/info.c | 3 ++-
sound/core/info_oss.c | 3 ++-
sound/core/memory.c | 41 ++++++++++++++---------------------------
sound/core/oss/mixer_oss.c | 3 ++-
sound/core/oss/pcm_oss.c | 3 ++-
sound/core/sound.c | 2 +-
sound/core/timer.c | 3 ++-
sound/isa/gus/gus_mem.c | 7 ++++---
sound/synth/emux/emux.c | 3 ++-
20 files changed, 70 insertions(+), 93 deletions(-)
diff -puN drivers/md/dm-ioctl.c~create-a-kstrdup-library-function drivers/md/dm-ioctl.c
--- 25/drivers/md/dm-ioctl.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/drivers/md/dm-ioctl.c 2005-06-18 02:48:59.000000000 -0700
@@ -122,14 +122,6 @@ static struct hash_cell *__get_uuid_cell
/*-----------------------------------------------------------------
* 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(cons
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(cons
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 *ol
/*
* duplicate new.
*/
- new_name = kstrdup(new);
+ new_name = kstrdup(new, GFP_KERNEL);
if (!new_name)
return -ENOMEM;
diff -puN drivers/parport/probe.c~create-a-kstrdup-library-function drivers/parport/probe.c
--- 25/drivers/parport/probe.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/drivers/parport/probe.c 2005-06-18 02:48:59.000000000 -0700
@@ -48,14 +48,6 @@ static void pretty_print(struct parport
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 *p
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 *p
!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 *p
} 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:
diff -puN include/linux/netdevice.h~create-a-kstrdup-library-function include/linux/netdevice.h
--- 25/include/linux/netdevice.h~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/include/linux/netdevice.h 2005-06-18 02:48:59.000000000 -0700
@@ -916,10 +916,6 @@ extern int skb_checksum_help(struct sk_b
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 */
diff -puN include/linux/string.h~create-a-kstrdup-library-function include/linux/string.h
--- 25/include/linux/string.h~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/include/linux/string.h 2005-06-18 02:48:59.000000000 -0700
@@ -88,6 +88,8 @@ extern int memcmp(const void *,const voi
extern void * memchr(const void *,int,__kernel_size_t);
#endif
+extern char *kstrdup(const char *s, int gfp);
+
#ifdef __cplusplus
}
#endif
diff -puN include/sound/core.h~create-a-kstrdup-library-function include/sound/core.h
--- 25/include/sound/core.h~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/include/sound/core.h 2005-06-18 02:48:59.000000000 -0700
@@ -292,6 +292,7 @@ void *snd_hidden_kcalloc(size_t n, size_
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);
diff -puN lib/string.c~create-a-kstrdup-library-function lib/string.c
--- 25/lib/string.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/lib/string.c 2005-06-18 02:48:59.000000000 -0700
@@ -607,3 +607,23 @@ void *memchr(const void *s, int c, size_
}
EXPORT_SYMBOL(memchr);
#endif
+
+/*
+ * 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)
+{
+ int len;
+ char *buf;
+
+ if (!s) return NULL;
+
+ len = strlen(s) + 1;
+ buf = kmalloc(len, gfp);
+ if (buf)
+ memcpy(buf, s, len);
+ return buf;
+}
diff -puN net/core/neighbour.c~create-a-kstrdup-library-function net/core/neighbour.c
--- 25/net/core/neighbour.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/net/core/neighbour.c 2005-06-18 02:48:59.000000000 -0700
@@ -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_dev
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;
diff -puN net/core/sysctl_net_core.c~create-a-kstrdup-library-function net/core/sysctl_net_core.c
--- 25/net/core/sysctl_net_core.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/net/core/sysctl_net_core.c 2005-06-18 02:48:59.000000000 -0700
@@ -31,19 +31,6 @@ 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
{
@@ -149,6 +136,4 @@ ctl_table core_table[] = {
{ .ctl_name = 0 }
};
-EXPORT_SYMBOL(net_sysctl_strdup);
-
#endif
diff -puN net/ipv4/devinet.c~create-a-kstrdup-library-function net/ipv4/devinet.c
--- 25/net/ipv4/devinet.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/net/ipv4/devinet.c 2005-06-18 02:48:59.000000000 -0700
@@ -1471,7 +1471,7 @@ static void devinet_sysctl_register(stru
* 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;
diff -puN net/ipv6/addrconf.c~create-a-kstrdup-library-function net/ipv6/addrconf.c
--- 25/net/ipv6/addrconf.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/net/ipv6/addrconf.c 2005-06-18 02:48:59.000000000 -0700
@@ -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(str
* 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;
diff -puN net/sunrpc/svcauth_unix.c~create-a-kstrdup-library-function net/sunrpc/svcauth_unix.c
--- 25/net/sunrpc/svcauth_unix.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/net/sunrpc/svcauth_unix.c 2005-06-18 02:48:59.000000000 -0700
@@ -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(cha
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;
diff -puN sound/core/info.c~create-a-kstrdup-library-function sound/core/info.c
--- 25/sound/core/info.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/sound/core/info.c 2005-06-18 02:48:59.000000000 -0700
@@ -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 = 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;
diff -puN sound/core/info_oss.c~create-a-kstrdup-library-function sound/core/info_oss.c
--- 25/sound/core/info_oss.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/sound/core/info_oss.c 2005-06-18 02:48:59.000000000 -0700
@@ -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 n
x = NULL;
}
} else {
- x = snd_kmalloc_strdup(string, GFP_KERNEL);
+ x = kstrdup(string, GFP_KERNEL);
if (x == NULL) {
up(&strings);
return -ENOMEM;
diff -puN sound/core/memory.c~create-a-kstrdup-library-function sound/core/memory.c
--- 25/sound/core/memory.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/sound/core/memory.c 2005-06-18 02:48:59.000000000 -0700
@@ -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);
@@ -214,36 +228,9 @@ 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
* @src: the source pointer on mmio
diff -puN sound/core/oss/mixer_oss.c~create-a-kstrdup-library-function sound/core/oss/mixer_oss.c
--- 25/sound/core/oss/mixer_oss.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/sound/core/oss/mixer_oss.c 2005-06-18 02:48:59.000000000 -0700
@@ -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
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;
diff -puN sound/core/oss/pcm_oss.c~create-a-kstrdup-library-function sound/core/oss/pcm_oss.c
--- 25/sound/core/oss/pcm_oss.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/sound/core/oss/pcm_oss.c 2005-06-18 02:48:59.000000000 -0700
@@ -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>
@@ -2357,7 +2358,7 @@ static void snd_pcm_oss_proc_write(snd_i
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;
}
diff -puN sound/core/sound.c~create-a-kstrdup-library-function sound/core/sound.c
--- 25/sound/core/sound.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/sound/core/sound.c 2005-06-18 02:48:59.000000000 -0700
@@ -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 */
diff -puN sound/core/timer.c~create-a-kstrdup-library-function sound/core/timer.c
--- 25/sound/core/timer.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/sound/core/timer.c 2005-06-18 02:48:59.000000000 -0700
@@ -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_i
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;
diff -puN sound/isa/gus/gus_mem.c~create-a-kstrdup-library-function sound/isa/gus/gus_mem.c
--- 25/sound/isa/gus/gus_mem.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/sound/isa/gus/gus_mem.c 2005-06-18 02:48:59.000000000 -0700
@@ -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(s
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 * gu
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
diff -puN sound/synth/emux/emux.c~create-a-kstrdup-library-function sound/synth/emux/emux.c
--- 25/sound/synth/emux/emux.c~create-a-kstrdup-library-function 2005-06-18 02:48:59.000000000 -0700
+++ 25-akpm/sound/synth/emux/emux.c 2005-06-18 02:48:59.000000000 -0700
@@ -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, s
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;
_