/*
* Trying to get rid of a group. We need to first get rid of any outstanding
* allocations and then free the group. Remember that fsnotify_clear_marks_by_group
* could miss marks that are being freed by inode and those marks could still
* hold a reference to this group (via group->num_marks) If we get into that
* situtation, the fsnotify_final_destroy_group will get called when that final
* mark is freed.
*/
static void fsnotify_destroy_group(struct fsnotify_group *group)
{
/* clear all inode marks for this group */
fsnotify_clear_marks_by_group(group);
synchronize_srcu(&fsnotify_mark_srcu);
/* past the point of no return, matches the initial value of 1 */
if (atomic_dec_and_test(&group->num_marks))
fsnotify_final_destroy_group(group);
}
/*
* Drop a reference to a group. Free it if it's through.
*/
void fsnotify_put_group(struct fsnotify_group *group)
{
if (atomic_dec_and_test(&group->refcnt))
fsnotify_final_destroy_group(group);
}
