exportfs: use dget_parent
Use dget_parent instead of opencoding it. This simplifies the code, but
more importanly prepares for the more complicated locking for a parent
dget in the dcache scale patch series.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index e9e1759..51b3040 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -74,21 +74,20 @@
find_disconnected_root(struct dentry *dentry)
{
dget(dentry);
- spin_lock(&dentry->d_lock);
- while (!IS_ROOT(dentry) &&
- (dentry->d_parent->d_flags & DCACHE_DISCONNECTED)) {
- struct dentry *parent = dentry->d_parent;
- dget(parent);
- spin_unlock(&dentry->d_lock);
+ while (!IS_ROOT(dentry)) {
+ struct dentry *parent = dget_parent(dentry);
+
+ if (!(parent->d_flags & DCACHE_DISCONNECTED)) {
+ dput(parent);
+ break;
+ }
+
dput(dentry);
dentry = parent;
- spin_lock(&dentry->d_lock);
}
- spin_unlock(&dentry->d_lock);
return dentry;
}
-
/*
* Make sure target_dir is fully connected to the dentry tree.
*