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OpenCloudOS-Kernel
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Driver core: exclude kobject_uevent.c for !CONFIG_HOTPLUG 

Move uevent specific logic from the core into kobject_uevent.c, which
does no longer require to link the unused string array if hotplug
is not compiled in.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers 2007-08-12 20:43:55 +02:00 committed by Greg Kroah-Hartman
parent 07c015e765
commit 5c5daf657c
4 changed files with 57 additions and 31 deletions
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18
drivers/base/core.c
View File

@ -234,13 +234,11 @@ static ssize_t show_uevent(struct device *dev, struct device_attribute *attr,
/* search the kset, the device belongs to */
top_kobj = &dev->kobj;
if (!top_kobj->kset && top_kobj->parent) {
do {
top_kobj = top_kobj->parent;
} while (!top_kobj->kset && top_kobj->parent);
}
while (!top_kobj->kset && top_kobj->parent)
top_kobj = top_kobj->parent;
if (!top_kobj->kset)
goto out;
kset = top_kobj->kset;
if (!kset->uevent_ops || !kset->uevent_ops->uevent)
goto out;
@ -270,17 +268,9 @@ out:
static ssize_t store_uevent(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
size_t len = count;
enum kobject_action action;
if (len && buf[len-1] == '\n')
len--;
for (action = 0; action < KOBJ_MAX; action++) {
if (strncmp(kobject_actions[action], buf, len) != 0)
continue;
if (kobject_actions[action][len] != '\0')
continue;
if (kobject_action_type(buf, count, &action) == 0) {
kobject_uevent(&dev->kobj, action);
goto out;
}

10
include/linux/kobject.h
View File

@ -58,9 +58,6 @@ enum kobject_action {
KOBJ_MAX
};
/* The list of strings defining the valid kobject actions as specified above */
extern const char *kobject_actions[];
struct kobject {
const char * k_name;
struct kref kref;
@ -241,6 +238,9 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
int add_uevent_var(struct kobj_uevent_env *env, const char *format, ...)
__attribute__((format (printf, 2, 3)));
int kobject_action_type(const char *buf, size_t count,
enum kobject_action *type);
#else
static inline int kobject_uevent(struct kobject *kobj, enum kobject_action action)
{ return 0; }
@ -251,6 +251,10 @@ static inline int kobject_uevent_env(struct kobject *kobj,
static inline int add_uevent_var(struct kobj_uevent_env *env, const char *format, ...)
{ return 0; }
static inline int kobject_action_type(const char *buf, size_t count,
enum kobject_action *type)
{ return -EINVAL; }
#endif
#endif /* __KERNEL__ */

3
lib/Makefile
View File

@ -10,7 +10,7 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \
lib-$(CONFIG_MMU) += ioremap.o
lib-$(CONFIG_SMP) += cpumask.o
lib-y += kobject.o kref.o kobject_uevent.o klist.o
lib-y += kobject.o kref.o klist.o
obj-y += div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \
bust_spinlocks.o hexdump.o kasprintf.o
@ -20,6 +20,7 @@ CFLAGS_kobject.o += -DDEBUG
CFLAGS_kobject_uevent.o += -DDEBUG
endif
lib-$(CONFIG_HOTPLUG) += kobject_uevent.o
obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o
obj-$(CONFIG_CHECK_SIGNATURE) += check_signature.o

57
lib/kobject_uevent.c
View File

@ -23,17 +23,6 @@
#include <net/sock.h>
/* the strings here must match the enum in include/linux/kobject.h */
const char *kobject_actions[] = {
"add",
"remove",
"change",
"move",
"online",
"offline",
};
#if defined(CONFIG_HOTPLUG)
u64 uevent_seqnum;
char uevent_helper[UEVENT_HELPER_PATH_LEN] = CONFIG_UEVENT_HELPER_PATH;
static DEFINE_SPINLOCK(sequence_lock);
@ -41,6 +30,50 @@ static DEFINE_SPINLOCK(sequence_lock);
static struct sock *uevent_sock;
#endif
/* the strings here must match the enum in include/linux/kobject.h */
static const char *kobject_actions[] = {
[KOBJ_ADD] = "add",
[KOBJ_REMOVE] = "remove",
[KOBJ_CHANGE] = "change",
[KOBJ_MOVE] = "move",
[KOBJ_ONLINE] = "online",
[KOBJ_OFFLINE] = "offline",
};
/**
* kobject_action_type - translate action string to numeric type
*
* @buf: buffer containing the action string, newline is ignored
* @len: length of buffer
* @type: pointer to the location to store the action type
*
* Returns 0 if the action string was recognized.
*/
int kobject_action_type(const char *buf, size_t count,
enum kobject_action *type)
{
enum kobject_action action;
int ret = -EINVAL;
if (count && buf[count-1] == '\n')
count--;
if (!count)
goto out;
for (action = 0; action < ARRAY_SIZE(kobject_actions); action++) {
if (strncmp(kobject_actions[action], buf, count) != 0)
continue;
if (kobject_actions[action][count] != '\0')
continue;
*type = action;
ret = 0;
break;
}
out:
return ret;
}
/**
* kobject_uevent_env - send an uevent with environmental data
*
@ -270,5 +303,3 @@ static int __init kobject_uevent_init(void)
postcore_initcall(kobject_uevent_init);
#endif
#endif /* CONFIG_HOTPLUG */