NFS: Reduce stack footprint of nfs_statfs()

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index dd589de..98d1ab8 100644 (file)
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -423,15 +423,19 @@ static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
        unsigned char blockbits;
        unsigned long blockres;
        struct nfs_fh *fh = NFS_FH(dentry->d_inode);
-       struct nfs_fattr fattr;
-       struct nfs_fsstat res = {
-                       .fattr = &fattr,
-       };
-       int error;
+       struct nfs_fsstat res;
+       int error = -ENOMEM;
+
+       res.fattr = nfs_alloc_fattr();
+       if (res.fattr == NULL)
+               goto out_err;
 
        error = server->nfs_client->rpc_ops->statfs(server, fh, &res);
+
+       nfs_free_fattr(res.fattr);
        if (error < 0)
                goto out_err;
+
        buf->f_type = NFS_SUPER_MAGIC;
 
        /*