fsnotify: use _rcu functions for mark list traversal
In preparation for srcu locking use all _rcu appropiete functions for mark
list addition, removal, and traversal. The operations are still done under a
spinlock at the end of this patch.
Signed-off-by: Eric Paris <eparis@redhat.com>
diff --git a/fs/notify/vfsmount_mark.c b/fs/notify/vfsmount_mark.c
index c4b3f14..b7ae640 100644
--- a/fs/notify/vfsmount_mark.c
+++ b/fs/notify/vfsmount_mark.c
@@ -39,7 +39,7 @@
spin_lock(&mnt->mnt_root->d_lock);
hlist_for_each_entry_safe(mark, pos, n, &mnt->mnt_fsnotify_marks, m.m_list) {
list_add(&mark->m.free_m_list, &free_list);
- hlist_del_init(&mark->m.m_list);
+ hlist_del_init_rcu(&mark->m.m_list);
fsnotify_get_mark(mark);
}
spin_unlock(&mnt->mnt_root->d_lock);
@@ -91,7 +91,7 @@
spin_lock(&mnt->mnt_root->d_lock);
- hlist_del_init(&mark->m.m_list);
+ hlist_del_init_rcu(&mark->m.m_list);
mark->m.mnt = NULL;
fsnotify_recalc_vfsmount_mask_locked(mnt);
@@ -156,7 +156,7 @@
/* is mark the first mark? */
if (hlist_empty(&mnt->mnt_fsnotify_marks)) {
- hlist_add_head(&mark->m.m_list, &mnt->mnt_fsnotify_marks);
+ hlist_add_head_rcu(&mark->m.m_list, &mnt->mnt_fsnotify_marks);
goto out;
}
@@ -172,13 +172,13 @@
if (mark->group < lmark->group)
continue;
- hlist_add_before(&mark->m.m_list, &lmark->m.m_list);
+ hlist_add_before_rcu(&mark->m.m_list, &lmark->m.m_list);
goto out;
}
BUG_ON(last == NULL);
/* mark should be the last entry. last is the current last entry */
- hlist_add_after(last, &mark->m.m_list);
+ hlist_add_after_rcu(last, &mark->m.m_list);
out:
fsnotify_recalc_vfsmount_mask_locked(mnt);
spin_unlock(&mnt->mnt_root->d_lock);