NFS: Kill the "defined but not used" compile error on nommu machines

Bryan Wu reports that when compiling NFS on nommu machines he gets a
"defined but not used" error on nfs_file_mmap().

The easiest fix is simply to get rid of the special casing in NFS, and
just always call generic_file_mmap() to set up the file.

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

diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 404c19c..1eab9c9 100644 (file)
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -64,11 +64,7 @@ const struct file_operations nfs_file_operations = {
        .write          = do_sync_write,
        .aio_read       = nfs_file_read,
        .aio_write      = nfs_file_write,
-#ifdef CONFIG_MMU
        .mmap           = nfs_file_mmap,
-#else
-       .mmap           = generic_file_mmap,
-#endif
        .open           = nfs_file_open,
        .flush          = nfs_file_flush,
        .release        = nfs_file_release,
@@ -304,11 +300,13 @@ nfs_file_mmap(struct file * file, struct vm_area_struct * vma)
        dprintk("NFS: mmap(%s/%s)\n",
                dentry->d_parent->d_name.name, dentry->d_name.name);
 
-       status = nfs_revalidate_mapping(inode, file->f_mapping);
+       /* Note: generic_file_mmap() returns ENOSYS on nommu systems
+        *       so we call that before revalidating the mapping
+        */
+       status = generic_file_mmap(file, vma);
        if (!status) {
                vma->vm_ops = &nfs_file_vm_ops;
-               vma->vm_flags |= VM_CAN_NONLINEAR;
-               file_accessed(file);
+               status = nfs_revalidate_mapping(inode, file->f_mapping);
        }
        return status;
 }