3 files changed, 7 insertions, 3 deletions

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index ae04892a5e5d..6cea7479c5b4 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -710,6 +710,8 @@ int nfs_lookup_verify_inode(struct inode *inode, struct nameidata *nd)
 {
         struct nfs_server *server = NFS_SERVER(inode);
 
+        if (test_bit(NFS_INO_MOUNTPOINT, &NFS_I(inode)->flags))
+                return 0;
         if (nd != NULL) {
                 /* VFS wants an on-the-wire revalidation */
                 if (nd->flags & LOOKUP_REVAL)
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 966a8850aa30..a4c7cf2bff3a 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -299,6 +299,7 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
                                 else
                                         inode->i_op = &nfs_mountpoint_inode_operations;
                                 inode->i_fop = NULL;
+                                set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags);
                         }
                 } else if (S_ISLNK(inode->i_mode))
                         inode->i_op = &nfs_symlink_inode_operations;
@@ -1003,8 +1004,9 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 
         server = NFS_SERVER(inode);
         /* Update the fsid? */
-        if (S_ISDIR(inode->i_mode)
-                        && !nfs_fsid_equal(&server->fsid, &fattr->fsid))
+        if (S_ISDIR(inode->i_mode) &&
+                        !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
+                        !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags))
                 server->fsid = fattr->fsid;
 
         /*
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index f55c437124a2..80c61fdb2720 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -734,7 +734,7 @@ int nfs_updatepage(struct file *file, struct page *page,
          */
         if (nfs_write_pageuptodate(page, inode) &&
                         inode->i_flock == NULL &&
-                        !(file->f_mode & O_SYNC)) {
+                        !(file->f_flags & O_SYNC)) {
                 count = max(count + offset, nfs_page_length(page));
                 offset = 0;
         }