diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/kobject.c | 60 | ||||
| -rw-r--r-- | lib/kobject_uevent.c | 2 | ||||
| -rw-r--r-- | lib/kref.c | 7 | ||||
| -rw-r--r-- | lib/string.c | 1 |
4 files changed, 60 insertions, 10 deletions
diff --git a/lib/kobject.c b/lib/kobject.c index efe67fa96a7..25204a41a9b 100644 --- a/lib/kobject.c +++ b/lib/kobject.c @@ -194,6 +194,17 @@ int kobject_add(struct kobject * kobj) unlink(kobj); if (parent) kobject_put(parent); + + /* be noisy on error issues */ + if (error == -EEXIST) + printk("kobject_add failed for %s with -EEXIST, " + "don't try to register things with the " + "same name in the same directory.\n", + kobject_name(kobj)); + else + printk("kobject_add failed for %s (%d)\n", + kobject_name(kobj), error); + dump_stack(); } return error; @@ -207,18 +218,13 @@ int kobject_add(struct kobject * kobj) int kobject_register(struct kobject * kobj) { - int error = 0; + int error = -EINVAL; if (kobj) { kobject_init(kobj); error = kobject_add(kobj); - if (error) { - printk("kobject_register failed for %s (%d)\n", - kobject_name(kobj),error); - dump_stack(); - } else + if (!error) kobject_uevent(kobj, KOBJ_ADD); - } else - error = -EINVAL; + } return error; } @@ -379,6 +385,44 @@ void kobject_put(struct kobject * kobj) } +static void dir_release(struct kobject *kobj) +{ + kfree(kobj); +} + +static struct kobj_type dir_ktype = { + .release = dir_release, + .sysfs_ops = NULL, + .default_attrs = NULL, +}; + +/** + * kobject_add_dir - add sub directory of object. + * @parent: object in which a directory is created. + * @name: directory name. + * + * Add a plain directory object as child of given object. + */ +struct kobject *kobject_add_dir(struct kobject *parent, const char *name) +{ + struct kobject *k; + + if (!parent) + return NULL; + + k = kzalloc(sizeof(*k), GFP_KERNEL); + if (!k) + return NULL; + + k->parent = parent; + k->ktype = &dir_ktype; + kobject_set_name(k, name); + kobject_register(k); + + return k; +} +EXPORT_SYMBOL_GPL(kobject_add_dir); + /** * kset_init - initialize a kset for use * @k: kset diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c index 086a0c6e888..982226daf93 100644 --- a/lib/kobject_uevent.c +++ b/lib/kobject_uevent.c @@ -26,6 +26,8 @@ #define NUM_ENVP 32 /* number of env pointers */ #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET) +u64 uevent_seqnum; +char uevent_helper[UEVENT_HELPER_PATH_LEN] = "/sbin/hotplug"; static DEFINE_SPINLOCK(sequence_lock); static struct sock *uevent_sock; diff --git a/lib/kref.c b/lib/kref.c index 0d07cc31c81..4a467faf136 100644 --- a/lib/kref.c +++ b/lib/kref.c @@ -52,7 +52,12 @@ int kref_put(struct kref *kref, void (*release)(struct kref *kref)) WARN_ON(release == NULL); WARN_ON(release == (void (*)(struct kref *))kfree); - if (atomic_dec_and_test(&kref->refcount)) { + /* + * if current count is one, we are the last user and can release object + * right now, avoiding an atomic operation on 'refcount' + */ + if ((atomic_read(&kref->refcount) == 1) || + (atomic_dec_and_test(&kref->refcount))) { release(kref); return 1; } diff --git a/lib/string.c b/lib/string.c index 037a48acedb..b3c28a3f633 100644 --- a/lib/string.c +++ b/lib/string.c @@ -403,7 +403,6 @@ char *strpbrk(const char *cs, const char *ct) } return NULL; } -EXPORT_SYMBOL(strpbrk); #endif #ifndef __HAVE_ARCH_STRSEP |