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| author | Eric Paris <eparis@redhat.com> | 2009-12-17 21:24:23 -0500 |
|---|---|---|
| committer | Eric Paris <eparis@redhat.com> | 2010-07-28 09:58:51 -0400 |
| commit | 36fddebaa8a9186d4f5817ab798a83400b2fb2e7 (patch) | |
| tree | 5fea41060cada4826677c12b7d4afa747841b124 /fs/notify/group.c | |
| parent | 19c2a0e1a2f60112c158342ba5f568f72b741c2c (diff) | |
| download | linux-36fddebaa8a9186d4f5817ab798a83400b2fb2e7.tar.gz linux-36fddebaa8a9186d4f5817ab798a83400b2fb2e7.tar.bz2 linux-36fddebaa8a9186d4f5817ab798a83400b2fb2e7.zip | |
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>
Diffstat (limited to 'fs/notify/group.c')
| -rw-r--r-- | fs/notify/group.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/notify/group.c b/fs/notify/group.c index c80809745312..656c534ffb66 100644 --- a/fs/notify/group.c +++ b/fs/notify/group.c @@ -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); |