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-rw-r--r--fs/autofs4/root.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index cc87c1a..cdb25eb 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -166,8 +166,10 @@ static struct dentry *autofs4_lookup_active(struct dentry *dentry)
const unsigned char *str = name->name;
struct list_head *p, *head;
- spin_lock(&sbi->lookup_lock);
head = &sbi->active_list;
+ if (list_empty(head))
+ return NULL;
+ spin_lock(&sbi->lookup_lock);
list_for_each(p, head) {
struct autofs_info *ino;
struct dentry *active;
@@ -218,8 +220,10 @@ static struct dentry *autofs4_lookup_expiring(struct dentry *dentry)
const unsigned char *str = name->name;
struct list_head *p, *head;
- spin_lock(&sbi->lookup_lock);
head = &sbi->expiring_list;
+ if (list_empty(head))
+ return NULL;
+ spin_lock(&sbi->lookup_lock);
list_for_each(p, head) {
struct autofs_info *ino;
struct dentry *expiring;
@@ -373,7 +377,7 @@ static struct vfsmount *autofs4_d_automount(struct path *path)
* this because the leaves of the directory tree under the
* mount never trigger mounts themselves (they have an autofs
* trigger mount mounted on them). But v4 pseudo direct mounts
- * do need the leaves to to trigger mounts. In this case we
+ * do need the leaves to trigger mounts. In this case we
* have no choice but to use the list_empty() check and
* require user space behave.
*/
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