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| author | Roman Shaposhnikov <x0166637@ti.com> | 2012-06-13 23:00:26 +0300 |
|---|---|---|
| committer | Roman Shaposhnikov <x0166637@ti.com> | 2012-06-13 23:00:26 +0300 |
| commit | 4efa29b240cc7dd0584ad3d2f6a446e6034e0a78 (patch) | |
| tree | 741e8a369da867cd29c112a5f9fc4dfe596b67cd /lib | |
| parent | 0f2c8a7c9c04e388f585a79a7e609d8427e68e08 (diff) | |
| download | kernel_samsung_espresso10-4efa29b240cc7dd0584ad3d2f6a446e6034e0a78.zip kernel_samsung_espresso10-4efa29b240cc7dd0584ad3d2f6a446e6034e0a78.tar.gz kernel_samsung_espresso10-4efa29b240cc7dd0584ad3d2f6a446e6034e0a78.tar.bz2 | |
Merge latest changes from google kernel/common.git
Kernel version updated to 3.0.31
Change-Id: Ifbd7150801f3beeec9cbaa566f249d8019ef9348
Signed-off-by: Roman Shaposhnikov <x0166637@ti.com>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/kobject_uevent.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c index ad72a03..6d40244 100644 --- a/lib/kobject_uevent.c +++ b/lib/kobject_uevent.c @@ -29,16 +29,17 @@ u64 uevent_seqnum; char uevent_helper[UEVENT_HELPER_PATH_LEN] = CONFIG_UEVENT_HELPER_PATH; -static DEFINE_SPINLOCK(sequence_lock); #ifdef CONFIG_NET struct uevent_sock { struct list_head list; struct sock *sk; }; static LIST_HEAD(uevent_sock_list); -static DEFINE_MUTEX(uevent_sock_mutex); #endif +/* This lock protects uevent_seqnum and uevent_sock_list */ +static DEFINE_MUTEX(uevent_sock_mutex); + /* the strings here must match the enum in include/linux/kobject.h */ static const char *kobject_actions[] = { [KOBJ_ADD] = "add", @@ -136,7 +137,6 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action, struct kobject *top_kobj; struct kset *kset; const struct kset_uevent_ops *uevent_ops; - u64 seq; int i = 0; int retval = 0; #ifdef CONFIG_NET @@ -243,17 +243,16 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action, else if (action == KOBJ_REMOVE) kobj->state_remove_uevent_sent = 1; + mutex_lock(&uevent_sock_mutex); /* we will send an event, so request a new sequence number */ - spin_lock(&sequence_lock); - seq = ++uevent_seqnum; - spin_unlock(&sequence_lock); - retval = add_uevent_var(env, "SEQNUM=%llu", (unsigned long long)seq); - if (retval) + retval = add_uevent_var(env, "SEQNUM=%llu", (unsigned long long)++uevent_seqnum); + if (retval) { + mutex_unlock(&uevent_sock_mutex); goto exit; + } #if defined(CONFIG_NET) /* send netlink message */ - mutex_lock(&uevent_sock_mutex); list_for_each_entry(ue_sk, &uevent_sock_list, list) { struct sock *uevent_sock = ue_sk->sk; struct sk_buff *skb; @@ -287,8 +286,8 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action, } else retval = -ENOMEM; } - mutex_unlock(&uevent_sock_mutex); #endif + mutex_unlock(&uevent_sock_mutex); /* call uevent_helper, usually only enabled during early boot */ if (uevent_helper[0] && !kobj_usermode_filter(kobj)) { |