NFS: Reduce stack footprint of nfs3_proc_readlink()

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

diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 982a81b..088dceb 100644 (file)
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -234,7 +234,7 @@ out:
 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
                unsigned int pgbase, unsigned int pglen)
 {
-       struct nfs_fattr        fattr;
+       struct nfs_fattr        *fattr;
        struct nfs3_readlinkargs args = {
                .fh             = NFS_FH(inode),
                .pgbase         = pgbase,
@@ -244,14 +244,19 @@ static int nfs3_proc_readlink(struct inode *inode, struct page *page,
        struct rpc_message msg = {
                .rpc_proc       = &nfs3_procedures[NFS3PROC_READLINK],
                .rpc_argp       = &args,
-               .rpc_resp       = &fattr,
        };
-       int                     status;
+       int status = -ENOMEM;
 
        dprintk("NFS call  readlink\n");
-       nfs_fattr_init(&fattr);
+       fattr = nfs_alloc_fattr();
+       if (fattr == NULL)
+               goto out;
+       msg.rpc_resp = fattr;
+
        status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
-       nfs_refresh_inode(inode, &fattr);
+       nfs_refresh_inode(inode, fattr);
+       nfs_free_fattr(fattr);
+out:
        dprintk("NFS reply readlink: %d\n", status);
        return status;
 }