diff options
Diffstat (limited to 'lib/kobject.c')
| -rw-r--r-- | lib/kobject.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/kobject.c b/lib/kobject.c index e2378597b989..fb49131f5ff9 100644 --- a/lib/kobject.c +++ b/lib/kobject.c @@ -100,6 +100,9 @@ static void fill_kobj_path(struct kset *kset, struct kobject *kobj, char *path, #define BUFFER_SIZE 1024 /* should be enough memory for the env */ #define NUM_ENVP 32 /* number of env pointers */ +static unsigned long sequence_num; +static spinlock_t sequence_lock = SPIN_LOCK_UNLOCKED; + static void kset_hotplug(const char *action, struct kset *kset, struct kobject *kobj) { @@ -112,6 +115,7 @@ static void kset_hotplug(const char *action, struct kset *kset, int kobj_path_length; char *kobj_path = NULL; char *name = NULL; + unsigned long seq; /* If the kset has a filter operation, call it. If it returns failure, no hotplug event is required. */ @@ -152,6 +156,13 @@ static void kset_hotplug(const char *action, struct kset *kset, envp [i++] = scratch; scratch += sprintf(scratch, "ACTION=%s", action) + 1; + spin_lock(&sequence_lock); + seq = sequence_num++; + spin_unlock(&sequence_lock); + + envp [i++] = scratch; + scratch += sprintf(scratch, "SEQNUM=%ld", seq) + 1; + kobj_path_length = get_kobj_path_length (kset, kobj); kobj_path = kmalloc (kobj_path_length, GFP_KERNEL); if (!kobj_path) |