staging: rtl8192u: remove unused files

I was doing some code audits looking at scattergather uses, and noticed
that update() in drivers/staging/rtl8192u/ieee80211/digest.c uses
sg.page which doesn't exist any longer, so this can't possibly compile.

Turns out that digest.c is actually unused.  It doesn't get referenced
in a Makefile or get compiled and doesn't get used as far as I can see.
I then widened the search to all the files in the directory.  There are
a *bunch* that look unused.  I removed all of them, then added them
back one at a time until the driver compiled again.

Signed-off-by: Dave Hansen <dave.hansen@intel.com>
Cc: jerry-chuang@realtek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 117 deletions

diff --git a/drivers/staging/rtl8192u/ieee80211/scatterwalk.c b/drivers/staging/rtl8192u/ieee80211/scatterwalk.c
deleted file mode 100644
index 8b73f6c..0000000
--- a/drivers/staging/rtl8192u/ieee80211/scatterwalk.c
+++ /dev/null
@@ -1,117 +0,0 @@
-/*
- * Cryptographic API.
- *
- * Cipher operations.
- *
- * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
- *               2002 Adam J. Richter <adam@yggdrasil.com>
- *               2004 Jean-Luc Cooke <jlcooke@certainkey.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- */
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/pagemap.h>
-#include <linux/highmem.h>
-#include <asm/scatterlist.h>
-#include "internal.h"
-#include "scatterwalk.h"
-
-void *scatterwalk_whichbuf(struct scatter_walk *walk, unsigned int nbytes, void *scratch)
-{
-	if (nbytes <= walk->len_this_page &&
-	    (((unsigned long)walk->data) & (PAGE_CACHE_SIZE - 1)) + nbytes <=
-	    PAGE_CACHE_SIZE)
-		return walk->data;
-	else
-		return scratch;
-}
-
-static void memcpy_dir(void *buf, void *sgdata, size_t nbytes, int out)
-{
-	if (out)
-		memcpy(sgdata, buf, nbytes);
-	else
-		memcpy(buf, sgdata, nbytes);
-}
-
-void scatterwalk_start(struct scatter_walk *walk, struct scatterlist *sg)
-{
-	unsigned int rest_of_page;
-
-	walk->sg = sg;
-
-	walk->page = sg->page;
-	walk->len_this_segment = sg->length;
-
-	rest_of_page = PAGE_CACHE_SIZE - (sg->offset & (PAGE_CACHE_SIZE - 1));
-	walk->len_this_page = min(sg->length, rest_of_page);
-	walk->offset = sg->offset;
-}
-
-void scatterwalk_map(struct scatter_walk *walk)
-{
-	walk->data = kmap_atomic(walk->page) + walk->offset;
-}
-
-static void scatterwalk_pagedone(struct scatter_walk *walk, int out,
-				 unsigned int more)
-{
-	/* walk->data may be pointing the first byte of the next page;
-	   however, we know we transferred at least one byte.  So,
-	   walk->data - 1 will be a virtual address in the mapped page. */
-
-	if (out)
-		flush_dcache_page(walk->page);
-
-	if (more) {
-		walk->len_this_segment -= walk->len_this_page;
-
-		if (walk->len_this_segment) {
-			walk->page++;
-			walk->len_this_page = min(walk->len_this_segment,
-						  (unsigned)PAGE_CACHE_SIZE);
-			walk->offset = 0;
-		}
-		else
-			scatterwalk_start(walk, sg_next(walk->sg));
-	}
-}
-
-void scatterwalk_done(struct scatter_walk *walk, int out, int more)
-{
-	crypto_kunmap(walk->data, out);
-	if (walk->len_this_page == 0 || !more)
-		scatterwalk_pagedone(walk, out, more);
-}
-
-/*
- * Do not call this unless the total length of all of the fragments
- * has been verified as multiple of the block size.
- */
-int scatterwalk_copychunks(void *buf, struct scatter_walk *walk,
-			   size_t nbytes)
-{
-	if (buf != walk->data) {
-		while (nbytes > walk->len_this_page) {
-			memcpy_dir(buf, walk->data, walk->len_this_page, out);
-			buf += walk->len_this_page;
-			nbytes -= walk->len_this_page;
-
-			kunmap_atomic(walk->data);
-			scatterwalk_pagedone(walk, out, 1);
-			scatterwalk_map(walk);
-		}
-
-		memcpy_dir(buf, walk->data, nbytes, out);
-	}
-
-	walk->offset += nbytes;
-	walk->len_this_page -= nbytes;
-	walk->len_this_segment -= nbytes;
-	return 0;
-}