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exportfs: use dget_parent

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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>
This commit is contained in:
Christoph Hellwig
2010-10-13 11:56:37 -04:00
committed by Al Viro
parent 3825bdb7ed
commit 0461ee2616
1 changed files with 8 additions and 9 deletions
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17
fs/exportfs/expfs.c
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@@ -74,21 +74,20 @@ static struct dentry *
find_disconnected_root(struct dentry *dentry) find_disconnected_root(struct dentry *dentry)
{ {
dget(dentry); dget(dentry);
spin_lock(&dentry->d_lock); while (!IS_ROOT(dentry)) {
while (!IS_ROOT(dentry) && struct dentry *parent = dget_parent(dentry);
(dentry->d_parent->d_flags & DCACHE_DISCONNECTED)) {
struct dentry *parent = dentry->d_parent; if (!(parent->d_flags & DCACHE_DISCONNECTED)) {
dget(parent); dput(parent);
spin_unlock(&dentry->d_lock); break;
}
dput(dentry); dput(dentry);
dentry = parent; dentry = parent;
spin_lock(&dentry->d_lock);
} }
spin_unlock(&dentry->d_lock);
return dentry; return dentry;
} }
/* /*
* Make sure target_dir is fully connected to the dentry tree. * Make sure target_dir is fully connected to the dentry tree.
* *