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fsnotify: initialize the group->num_marks in a better place 

Currently the comments say that group->num_marks is held because the group
is on the fsnotify_group list.  This isn't strictly the case, we really
just hold the num_marks for the life of the group (any time group->refcnt
is != 0)  This patch moves the initialization stuff and makes it clear when
it is really being held.

Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Eric Paris 2009-12-17 21:24:23 -05:00
parent 19c2a0e1a2
commit 36fddebaa8
1 changed files with 7 additions and 3 deletions
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10
fs/notify/group.c
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@ -82,9 +82,6 @@ static void fsnotify_add_group(struct fsnotify_group *group)
BUG_ON(!mutex_is_locked(&fsnotify_grp_mutex));
group->on_inode_group_list = 1;
/* being on the fsnotify_groups list holds one num_marks */
atomic_inc(&group->num_marks);
list_add_tail_rcu(&group->inode_group_list, &fsnotify_inode_groups);
}
@ -183,7 +180,14 @@ struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops)
if (!group)
return ERR_PTR(-ENOMEM);
/* set to 0 when there a no external references to this group */
atomic_set(&group->refcnt, 1);
/*
* hits 0 when there are no external references AND no marks for
* this group
*/
atomic_set(&group->num_marks, 1);
mutex_init(&group->notification_mutex);
INIT_LIST_HEAD(&group->notification_list);