NFS: Don't use vm_map_ram() in readdir

vm_map_ram() is not available on NOMMU platforms, and causes trouble
on incoherrent architectures such as ARM when we access the page data
through both the direct and the virtual mapping.

The alternative is to use the direct mapping to access page data
for the case when we are not crossing a page boundary, but to copy
the data into a linear scratch buffer when we are accessing data
that spans page boundaries.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Tested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: stable@kernel.org  [2.6.37]

1 files changed, 0 insertions, 6 deletions

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 9f1826b012e6..0662a9821df5 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -6215,12 +6215,6 @@ __be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
         if (verify_attr_len(xdr, p, len) < 0)
                 goto out_overflow;
 
-        p = xdr_inline_peek(xdr, 8);
-        if (p != NULL)
-                entry->eof = !p[0] && p[1];
-        else
-                entry->eof = 0;
-
         return p;
 
 out_overflow: