NFS: Fix memroy leak for double mounts
When double mounting same nfs filesystem, the devname saved in d_fsdata will be lost.The second mount should not change the devname that be saved in d_fsdata. Signed-off-by: Kinglong Mee <kinglongmee@gmail.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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@ -120,7 +120,8 @@ struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh,
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security_d_instantiate(ret, inode);
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security_d_instantiate(ret, inode);
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spin_lock(&ret->d_lock);
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spin_lock(&ret->d_lock);
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if (IS_ROOT(ret) && !(ret->d_flags & DCACHE_NFSFS_RENAMED)) {
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if (IS_ROOT(ret) && !ret->d_fsdata &&
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!(ret->d_flags & DCACHE_NFSFS_RENAMED)) {
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ret->d_fsdata = name;
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ret->d_fsdata = name;
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name = NULL;
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name = NULL;
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}
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}
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