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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
  nd->inode is not set on the second attempt in path_walk()
  unfuck proc_sysctl ->d_compare()
  minimal fix for do_filp_open() race
This commit is contained in:
Linus Torvalds
2011-03-09 13:55:51 -08:00
parent a5abba989d b306419ae0
commit 78833dd706
5 changed files with 42 additions and 16 deletions
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kernel/sysctl.c
+10 -5
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@@ -194,9 +194,9 @@ static int sysrq_sysctl_handler(ctl_table *table, int write,
static struct ctl_table root_table[];
static struct ctl_table_root sysctl_table_root;
static struct ctl_table_header root_table_header = {
.count = 1,
{{.count = 1,
.ctl_table = root_table,
.ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list),
.ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list),}},
.root = &sysctl_table_root,
.set = &sysctl_table_root.default_set,
};
@@ -1567,11 +1567,16 @@ void sysctl_head_get(struct ctl_table_header *head)
spin_unlock(&sysctl_lock);
}
static void free_head(struct rcu_head *rcu)
{
kfree(container_of(rcu, struct ctl_table_header, rcu));
}
void sysctl_head_put(struct ctl_table_header *head)
{
spin_lock(&sysctl_lock);
if (!--head->count)
kfree(head);
call_rcu(&head->rcu, free_head);
spin_unlock(&sysctl_lock);
}
@@ -1948,10 +1953,10 @@ void unregister_sysctl_table(struct ctl_table_header * header)
start_unregistering(header);
if (!--header->parent->count) {
WARN_ON(1);
kfree(header->parent);
call_rcu(&header->parent->rcu, free_head);
}
if (!--header->count)
kfree(header);
call_rcu(&header->rcu, free_head);
spin_unlock(&sysctl_lock);
}