Staging: Rename ramzswap files to zram

Related changes:
 - Modify revelant Kconfig and Makefile accordingly.
 - Change include filenames in code.
 - Remove dependency on CONFIG_SWAP in Kconfig as zram usage
is no longer limited to swap disks.

Signed-off-by: Nitin Gupta <ngupta@vflare.org>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

9 files changed, 0 insertions, 1713 deletions

diff --git a/drivers/staging/ramzswap/Kconfig b/drivers/staging/ramzswap/Kconfig
deleted file mode 100644
index 127b3c6c959..00000000000
--- a/drivers/staging/ramzswap/Kconfig
+++ /dev/null
@@ -1,21 +0,0 @@
-config RAMZSWAP
-	tristate "Compressed in-memory swap device (ramzswap)"
-	depends on SWAP
-	select LZO_COMPRESS
-	select LZO_DECOMPRESS
-	default n
-	help
-	  Creates virtual block devices which can (only) be used as swap
-	  disks. Pages swapped to these disks are compressed and stored in
-	  memory itself.
-
-	  See ramzswap.txt for more information.
-	  Project home: http://compcache.googlecode.com/
-
-config RAMZSWAP_STATS
-	bool "Enable ramzswap stats"
-	depends on RAMZSWAP
-	default y
-	help
-	  Enable statistics collection for ramzswap. This adds only a minimal
-	  overhead. In unsure, say Y.
diff --git a/drivers/staging/ramzswap/Makefile b/drivers/staging/ramzswap/Makefile
deleted file mode 100644
index 507d7dc3b86..00000000000
--- a/drivers/staging/ramzswap/Makefile
+++ /dev/null
@@ -1,3 +0,0 @@
-ramzswap-objs	:=	ramzswap_drv.o xvmalloc.o
-
-obj-$(CONFIG_RAMZSWAP)	+=	ramzswap.o
diff --git a/drivers/staging/ramzswap/ramzswap.txt b/drivers/staging/ramzswap/ramzswap.txt
deleted file mode 100644
index 9694acfeb43..00000000000
--- a/drivers/staging/ramzswap/ramzswap.txt
+++ /dev/null
@@ -1,51 +0,0 @@
-ramzswap: Compressed RAM based swap device
--------------------------------------------
-
-Project home: http://compcache.googlecode.com/
-
-* Introduction
-
-The ramzswap module creates RAM based block devices which can (only) be used as
-swap disks. Pages swapped to these devices are compressed and stored in memory
-itself. See project home for use cases, performance numbers and a lot more.
-
-Individual ramzswap devices are configured and initialized using rzscontrol
-userspace utility as shown in examples below. See rzscontrol man page for more
-details.
-
-* Usage
-
-Following shows a typical sequence of steps for using ramzswap.
-
-1) Load Modules:
-	modprobe ramzswap num_devices=4
-	This creates 4 (uninitialized) devices: /dev/ramzswap{0,1,2,3}
-	(num_devices parameter is optional. Default: 1)
-
-2) Initialize:
-	Use rzscontrol utility to configure and initialize individual
-	ramzswap devices. Example:
-	rzscontrol /dev/ramzswap2 --init # uses default value of disksize_kb
-
-	*See rzscontrol man page for more details and examples*
-
-3) Activate:
-	swapon /dev/ramzswap2 # or any other initialized ramzswap device
-
-4) Stats:
-	rzscontrol /dev/ramzswap2 --stats
-
-5) Deactivate:
-	swapoff /dev/ramzswap2
-
-6) Reset:
-	rzscontrol /dev/ramzswap2 --reset
-	(This frees all the memory allocated for this device).
-
-
-Please report any problems at:
- - Mailing list: linux-mm-cc at laptop dot org
- - Issue tracker: http://code.google.com/p/compcache/issues/list
-
-Nitin Gupta
-ngupta@vflare.org
diff --git a/drivers/staging/ramzswap/ramzswap_drv.c b/drivers/staging/ramzswap/ramzswap_drv.c
deleted file mode 100644
index 7b5cc61b3d6..00000000000
--- a/drivers/staging/ramzswap/ramzswap_drv.c
+++ /dev/null
@@ -1,805 +0,0 @@
-/*
- * Compressed RAM based swap device
- *
- * Copyright (C) 2008, 2009, 2010  Nitin Gupta
- *
- * This code is released using a dual license strategy: BSD/GPL
- * You can choose the licence that better fits your requirements.
- *
- * Released under the terms of 3-clause BSD License
- * Released under the terms of GNU General Public License Version 2.0
- *
- * Project home: http://compcache.googlecode.com
- */
-
-#define KMSG_COMPONENT "ramzswap"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/bitops.h>
-#include <linux/blkdev.h>
-#include <linux/buffer_head.h>
-#include <linux/device.h>
-#include <linux/genhd.h>
-#include <linux/highmem.h>
-#include <linux/slab.h>
-#include <linux/lzo.h>
-#include <linux/string.h>
-#include <linux/swap.h>
-#include <linux/swapops.h>
-#include <linux/vmalloc.h>
-
-#include "ramzswap_drv.h"
-
-/* Globals */
-static int ramzswap_major;
-static struct ramzswap *devices;
-
-/* Module params (documentation at end) */
-static unsigned int num_devices;
-
-static int rzs_test_flag(struct ramzswap *rzs, u32 index,
-			enum rzs_pageflags flag)
-{
-	return rzs->table[index].flags & BIT(flag);
-}
-
-static void rzs_set_flag(struct ramzswap *rzs, u32 index,
-			enum rzs_pageflags flag)
-{
-	rzs->table[index].flags |= BIT(flag);
-}
-
-static void rzs_clear_flag(struct ramzswap *rzs, u32 index,
-			enum rzs_pageflags flag)
-{
-	rzs->table[index].flags &= ~BIT(flag);
-}
-
-static int page_zero_filled(void *ptr)
-{
-	unsigned int pos;
-	unsigned long *page;
-
-	page = (unsigned long *)ptr;
-
-	for (pos = 0; pos != PAGE_SIZE / sizeof(*page); pos++) {
-		if (page[pos])
-			return 0;
-	}
-
-	return 1;
-}
-
-static void ramzswap_set_disksize(struct ramzswap *rzs, size_t totalram_bytes)
-{
-	if (!rzs->disksize) {
-		pr_info(
-		"disk size not provided. You can use disksize_kb module "
-		"param to specify size.\nUsing default: (%u%% of RAM).\n",
-		default_disksize_perc_ram
-		);
-		rzs->disksize = default_disksize_perc_ram *
-					(totalram_bytes / 100);
-	}
-
-	if (rzs->disksize > 2 * (totalram_bytes)) {
-		pr_info(
-		"There is little point creating a ramzswap of greater than "
-		"twice the size of memory since we expect a 2:1 compression "
-		"ratio. Note that ramzswap uses about 0.1%% of the size of "
-		"the swap device when not in use so a huge ramzswap is "
-		"wasteful.\n"
-		"\tMemory Size: %zu kB\n"
-		"\tSize you selected: %zu kB\n"
-		"Continuing anyway ...\n",
-		totalram_bytes >> 10, rzs->disksize
-		);
-	}
-
-	rzs->disksize &= PAGE_MASK;
-}
-
-static void ramzswap_ioctl_get_stats(struct ramzswap *rzs,
-			struct ramzswap_ioctl_stats *s)
-{
-	s->disksize = rzs->disksize;
-
-#if defined(CONFIG_RAMZSWAP_STATS)
-	{
-	struct ramzswap_stats *rs = &rzs->stats;
-	size_t succ_writes, mem_used;
-	unsigned int good_compress_perc = 0, no_compress_perc = 0;
-
-	mem_used = xv_get_total_size_bytes(rzs->mem_pool)
-			+ (rs->pages_expand << PAGE_SHIFT);
-	succ_writes = rzs_stat64_read(rzs, &rs->num_writes) -
-			rzs_stat64_read(rzs, &rs->failed_writes);
-
-	if (succ_writes && rs->pages_stored) {
-		good_compress_perc = rs->good_compress * 100
-					/ rs->pages_stored;
-		no_compress_perc = rs->pages_expand * 100
-					/ rs->pages_stored;
-	}
-
-	s->num_reads = rzs_stat64_read(rzs, &rs->num_reads);
-	s->num_writes = rzs_stat64_read(rzs, &rs->num_writes);
-	s->failed_reads = rzs_stat64_read(rzs, &rs->failed_reads);
-	s->failed_writes = rzs_stat64_read(rzs, &rs->failed_writes);
-	s->invalid_io = rzs_stat64_read(rzs, &rs->invalid_io);
-	s->notify_free = rzs_stat64_read(rzs, &rs->notify_free);
-	s->pages_zero = rs->pages_zero;
-
-	s->good_compress_pct = good_compress_perc;
-	s->pages_expand_pct = no_compress_perc;
-
-	s->pages_stored = rs->pages_stored;
-	s->pages_used = mem_used >> PAGE_SHIFT;
-	s->orig_data_size = rs->pages_stored << PAGE_SHIFT;
-	s->compr_data_size = rs->compr_size;
-	s->mem_used_total = mem_used;
-	}
-#endif /* CONFIG_RAMZSWAP_STATS */
-}
-
-static void ramzswap_free_page(struct ramzswap *rzs, size_t index)
-{
-	u32 clen;
-	void *obj;
-
-	struct page *page = rzs->table[index].page;
-	u32 offset = rzs->table[index].offset;
-
-	if (unlikely(!page)) {
-		/*
-		 * No memory is allocated for zero filled pages.
-		 * Simply clear zero page flag.
-		 */
-		if (rzs_test_flag(rzs, index, RZS_ZERO)) {
-			rzs_clear_flag(rzs, index, RZS_ZERO);
-			rzs_stat_dec(&rzs->stats.pages_zero);
-		}
-		return;
-	}
-
-	if (unlikely(rzs_test_flag(rzs, index, RZS_UNCOMPRESSED))) {
-		clen = PAGE_SIZE;
-		__free_page(page);
-		rzs_clear_flag(rzs, index, RZS_UNCOMPRESSED);
-		rzs_stat_dec(&rzs->stats.pages_expand);
-		goto out;
-	}
-
-	obj = kmap_atomic(page, KM_USER0) + offset;
-	clen = xv_get_object_size(obj) - sizeof(struct zobj_header);
-	kunmap_atomic(obj, KM_USER0);
-
-	xv_free(rzs->mem_pool, page, offset);
-	if (clen <= PAGE_SIZE / 2)
-		rzs_stat_dec(&rzs->stats.good_compress);
-
-out:
-	rzs->stats.compr_size -= clen;
-	rzs_stat_dec(&rzs->stats.pages_stored);
-
-	rzs->table[index].page = NULL;
-	rzs->table[index].offset = 0;
-}
-
-static void handle_zero_page(struct page *page)
-{
-	void *user_mem;
-
-	user_mem = kmap_atomic(page, KM_USER0);
-	memset(user_mem, 0, PAGE_SIZE);
-	kunmap_atomic(user_mem, KM_USER0);
-
-	flush_dcache_page(page);
-}
-
-static void handle_uncompressed_page(struct ramzswap *rzs,
-				struct page *page, u32 index)
-{
-	unsigned char *user_mem, *cmem;
-
-	user_mem = kmap_atomic(page, KM_USER0);
-	cmem = kmap_atomic(rzs->table[index].page, KM_USER1) +
-			rzs->table[index].offset;
-
-	memcpy(user_mem, cmem, PAGE_SIZE);
-	kunmap_atomic(user_mem, KM_USER0);
-	kunmap_atomic(cmem, KM_USER1);
-
-	flush_dcache_page(page);
-}
-
-static int ramzswap_read(struct ramzswap *rzs, struct bio *bio)
-{
-
-	int i;
-	u32 index;
-	struct bio_vec *bvec;
-
-	rzs_stat64_inc(rzs, &rzs->stats.num_reads);
-
-	index = bio->bi_sector >> SECTORS_PER_PAGE_SHIFT;
-	bio_for_each_segment(bvec, bio, i) {
-		int ret;
-		size_t clen;
-		struct page *page;
-		struct zobj_header *zheader;
-		unsigned char *user_mem, *cmem;
-
-		page = bvec->bv_page;
-
-		if (rzs_test_flag(rzs, index, RZS_ZERO)) {
-			handle_zero_page(page);
-			continue;
-		}
-
-		/* Requested page is not present in compressed area */
-		if (unlikely(!rzs->table[index].page)) {
-			pr_debug("Read before write: sector=%lu, size=%u",
-				(ulong)(bio->bi_sector), bio->bi_size);
-			/* Do nothing */
-			continue;
-		}
-
-		/* Page is stored uncompressed since it's incompressible */
-		if (unlikely(rzs_test_flag(rzs, index, RZS_UNCOMPRESSED))) {
-			handle_uncompressed_page(rzs, page, index);
-			continue;
-		}
-
-		user_mem = kmap_atomic(page, KM_USER0);
-		clen = PAGE_SIZE;
-
-		cmem = kmap_atomic(rzs->table[index].page, KM_USER1) +
-				rzs->table[index].offset;
-
-		ret = lzo1x_decompress_safe(
-			cmem + sizeof(*zheader),
-			xv_get_object_size(cmem) - sizeof(*zheader),
-			user_mem, &clen);
-
-		kunmap_atomic(user_mem, KM_USER0);
-		kunmap_atomic(cmem, KM_USER1);
-
-		/* Should NEVER happen. Return bio error if it does. */
-		if (unlikely(ret != LZO_E_OK)) {
-			pr_err("Decompression failed! err=%d, page=%u\n",
-				ret, index);
-			rzs_stat64_inc(rzs, &rzs->stats.failed_reads);
-			goto out;
-		}
-
-		flush_dcache_page(page);
-		index++;
-	}
-
-	set_bit(BIO_UPTODATE, &bio->bi_flags);
-	bio_endio(bio, 0);
-	return 0;
-
-out:
-	bio_io_error(bio);
-	return 0;
-}
-
-static int ramzswap_write(struct ramzswap *rzs, struct bio *bio)
-{
-	int i;
-	u32 index;
-	struct bio_vec *bvec;
-
-	rzs_stat64_inc(rzs, &rzs->stats.num_writes);
-
-	index = bio->bi_sector >> SECTORS_PER_PAGE_SHIFT;
-
-	bio_for_each_segment(bvec, bio, i) {
-		int ret;
-		u32 offset;
-		size_t clen;
-		struct zobj_header *zheader;
-		struct page *page, *page_store;
-		unsigned char *user_mem, *cmem, *src;
-
-		page = bvec->bv_page;
-		src = rzs->compress_buffer;
-
-		/*
-		 * System overwrites unused sectors. Free memory associated
-		 * with this sector now.
-		 */
-		if (rzs->table[index].page ||
-				rzs_test_flag(rzs, index, RZS_ZERO))
-			ramzswap_free_page(rzs, index);
-
-		mutex_lock(&rzs->lock);
-
-		user_mem = kmap_atomic(page, KM_USER0);
-		if (page_zero_filled(user_mem)) {
-			kunmap_atomic(user_mem, KM_USER0);
-			mutex_unlock(&rzs->lock);
-			rzs_stat_inc(&rzs->stats.pages_zero);
-			rzs_set_flag(rzs, index, RZS_ZERO);
-			continue;
-		}
-
-		ret = lzo1x_1_compress(user_mem, PAGE_SIZE, src, &clen,
-					rzs->compress_workmem);
-
-		kunmap_atomic(user_mem, KM_USER0);
-
-		if (unlikely(ret != LZO_E_OK)) {
-			mutex_unlock(&rzs->lock);
-			pr_err("Compression failed! err=%d\n", ret);
-			rzs_stat64_inc(rzs, &rzs->stats.failed_writes);
-			goto out;
-		}
-
-		/*
-		 * Page is incompressible. Store it as-is (uncompressed)
-		 * since we do not want to return too many swap write
-		 * errors which has side effect of hanging the system.
-		 */
-		if (unlikely(clen > max_zpage_size)) {
-			clen = PAGE_SIZE;
-			page_store = alloc_page(GFP_NOIO | __GFP_HIGHMEM);
-			if (unlikely(!page_store)) {
-				mutex_unlock(&rzs->lock);
-				pr_info("Error allocating memory for "
-					"incompressible page: %u\n", index);
-				rzs_stat64_inc(rzs, &rzs->stats.failed_writes);
-				goto out;
-			}
-
-			offset = 0;
-			rzs_set_flag(rzs, index, RZS_UNCOMPRESSED);
-			rzs_stat_inc(&rzs->stats.pages_expand);
-			rzs->table[index].page = page_store;
-			src = kmap_atomic(page, KM_USER0);
-			goto memstore;
-		}
-
-		if (xv_malloc(rzs->mem_pool, clen + sizeof(*zheader),
-				&rzs->table[index].page, &offset,
-				GFP_NOIO | __GFP_HIGHMEM)) {
-			mutex_unlock(&rzs->lock);
-			pr_info("Error allocating memory for compressed "
-				"page: %u, size=%zu\n", index, clen);
-			rzs_stat64_inc(rzs, &rzs->stats.failed_writes);
-			goto out;
-		}
-
-memstore:
-		rzs->table[index].offset = offset;
-
-		cmem = kmap_atomic(rzs->table[index].page, KM_USER1) +
-				rzs->table[index].offset;
-
-#if 0
-		/* Back-reference needed for memory defragmentation */
-		if (!rzs_test_flag(rzs, index, RZS_UNCOMPRESSED)) {
-			zheader = (struct zobj_header *)cmem;
-			zheader->table_idx = index;
-			cmem += sizeof(*zheader);
-		}
-#endif
-
-		memcpy(cmem, src, clen);
-
-		kunmap_atomic(cmem, KM_USER1);
-		if (unlikely(rzs_test_flag(rzs, index, RZS_UNCOMPRESSED)))
-			kunmap_atomic(src, KM_USER0);
-
-		/* Update stats */
-		rzs->stats.compr_size += clen;
-		rzs_stat_inc(&rzs->stats.pages_stored);
-		if (clen <= PAGE_SIZE / 2)
-			rzs_stat_inc(&rzs->stats.good_compress);
-
-		mutex_unlock(&rzs->lock);
-		index++;
-	}
-
-	set_bit(BIO_UPTODATE, &bio->bi_flags);
-	bio_endio(bio, 0);
-	return 0;
-
-out:
-	bio_io_error(bio);
-	return 0;
-}
-
-/*
- * Check if request is within bounds and page aligned.
- */
-static inline int valid_io_request(struct ramzswap *rzs, struct bio *bio)
-{
-	if (unlikely(
-		(bio->bi_sector >= (rzs->disksize >> SECTOR_SHIFT)) ||
-		(bio->bi_sector & (SECTORS_PER_PAGE - 1)) ||
-		(bio->bi_size & (PAGE_SIZE - 1)))) {
-
-		return 0;
-	}
-
-	/* I/O request is valid */
-	return 1;
-}
-
-/*
- * Handler function for all ramzswap I/O requests.
- */
-static int ramzswap_make_request(struct request_queue *queue, struct bio *bio)
-{
-	int ret = 0;
-	struct ramzswap *rzs = queue->queuedata;
-
-	if (unlikely(!rzs->init_done)) {
-		bio_io_error(bio);
-		return 0;
-	}
-
-	if (!valid_io_request(rzs, bio)) {
-		rzs_stat64_inc(rzs, &rzs->stats.invalid_io);
-		bio_io_error(bio);
-		return 0;
-	}
-
-	switch (bio_data_dir(bio)) {
-	case READ:
-		ret = ramzswap_read(rzs, bio);
-		break;
-
-	case WRITE:
-		ret = ramzswap_write(rzs, bio);
-		break;
-	}
-
-	return ret;
-}
-
-static void reset_device(struct ramzswap *rzs)
-{
-	size_t index;
-
-	/* Do not accept any new I/O request */
-	rzs->init_done = 0;
-
-	/* Free various per-device buffers */
-	kfree(rzs->compress_workmem);
-	free_pages((unsigned long)rzs->compress_buffer, 1);
-
-	rzs->compress_workmem = NULL;
-	rzs->compress_buffer = NULL;
-
-	/* Free all pages that are still in this ramzswap device */
-	for (index = 0; index < rzs->disksize >> PAGE_SHIFT; index++) {
-		struct page *page;
-		u16 offset;
-
-		page = rzs->table[index].page;
-		offset = rzs->table[index].offset;
-
-		if (!page)
-			continue;
-
-		if (unlikely(rzs_test_flag(rzs, index, RZS_UNCOMPRESSED)))
-			__free_page(page);
-		else
-			xv_free(rzs->mem_pool, page, offset);
-	}
-
-	vfree(rzs->table);
-	rzs->table = NULL;
-
-	xv_destroy_pool(rzs->mem_pool);
-	rzs->mem_pool = NULL;
-
-	/* Reset stats */
-	memset(&rzs->stats, 0, sizeof(rzs->stats));
-
-	rzs->disksize = 0;
-}
-
-static int ramzswap_ioctl_init_device(struct ramzswap *rzs)
-{
-	int ret;
-	size_t num_pages;
-
-	if (rzs->init_done) {
-		pr_info("Device already initialized!\n");
-		return -EBUSY;
-	}
-
-	ramzswap_set_disksize(rzs, totalram_pages << PAGE_SHIFT);
-
-	rzs->compress_workmem = kzalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
-	if (!rzs->compress_workmem) {
-		pr_err("Error allocating compressor working memory!\n");
-		ret = -ENOMEM;
-		goto fail;
-	}
-
-	rzs->compress_buffer = (void *)__get_free_pages(__GFP_ZERO, 1);
-	if (!rzs->compress_buffer) {
-		pr_err("Error allocating compressor buffer space\n");
-		ret = -ENOMEM;
-		goto fail;
-	}
-
-	num_pages = rzs->disksize >> PAGE_SHIFT;
-	rzs->table = vmalloc(num_pages * sizeof(*rzs->table));
-	if (!rzs->table) {
-		pr_err("Error allocating ramzswap address table\n");
-		/* To prevent accessing table entries during cleanup */
-		rzs->disksize = 0;
-		ret = -ENOMEM;
-		goto fail;
-	}
-	memset(rzs->table, 0, num_pages * sizeof(*rzs->table));
-
-	set_capacity(rzs->disk, rzs->disksize >> SECTOR_SHIFT);
-
-	/* ramzswap devices sort of resembles non-rotational disks */
-	queue_flag_set_unlocked(QUEUE_FLAG_NONROT, rzs->disk->queue);
-
-	rzs->mem_pool = xv_create_pool();
-	if (!rzs->mem_pool) {
-		pr_err("Error creating memory pool\n");
-		ret = -ENOMEM;
-		goto fail;
-	}
-
-	rzs->init_done = 1;
-
-	pr_debug("Initialization done!\n");
-	return 0;
-
-fail:
-	reset_device(rzs);
-
-	pr_err("Initialization failed: err=%d\n", ret);
-	return ret;
-}
-
-static int ramzswap_ioctl_reset_device(struct ramzswap *rzs)
-{
-	if (rzs->init_done)
-		reset_device(rzs);
-
-	return 0;
-}
-
-static int ramzswap_ioctl(struct block_device *bdev, fmode_t mode,
-			unsigned int cmd, unsigned long arg)
-{
-	int ret = 0;
-	size_t disksize_kb;
-
-	struct ramzswap *rzs = bdev->bd_disk->private_data;
-
-	switch (cmd) {
-	case RZSIO_SET_DISKSIZE_KB:
-		if (rzs->init_done) {
-			ret = -EBUSY;
-			goto out;
-		}
-		if (copy_from_user(&disksize_kb, (void *)arg,
-						_IOC_SIZE(cmd))) {
-			ret = -EFAULT;
-			goto out;
-		}
-		rzs->disksize = disksize_kb << 10;
-		pr_info("Disk size set to %zu kB\n", disksize_kb);
-		break;
-
-	case RZSIO_GET_STATS:
-	{
-		struct ramzswap_ioctl_stats *stats;
-		if (!rzs->init_done) {
-			ret = -ENOTTY;
-			goto out;
-		}
-		stats = kzalloc(sizeof(*stats), GFP_KERNEL);
-		if (!stats) {
-			ret = -ENOMEM;
-			goto out;
-		}
-		ramzswap_ioctl_get_stats(rzs, stats);
-		if (copy_to_user((void *)arg, stats, sizeof(*stats))) {
-			kfree(stats);
-			ret = -EFAULT;
-			goto out;
-		}
-		kfree(stats);
-		break;
-	}
-	case RZSIO_INIT:
-		ret = ramzswap_ioctl_init_device(rzs);
-		break;
-
-	case RZSIO_RESET:
-		/* Do not reset an active device! */
-		if (bdev->bd_holders) {
-			ret = -EBUSY;
-			goto out;
-		}
-
-		/* Make sure all pending I/O is finished */
-		if (bdev)
-			fsync_bdev(bdev);
-
-		ret = ramzswap_ioctl_reset_device(rzs);
-		break;
-
-	default:
-		pr_info("Invalid ioctl %u\n", cmd);
-		ret = -ENOTTY;
-	}
-
-out:
-	return ret;
-}
-
-void ramzswap_slot_free_notify(struct block_device *bdev, unsigned long index)
-{
-	struct ramzswap *rzs;
-
-	rzs = bdev->bd_disk->private_data;
-	ramzswap_free_page(rzs, index);
-	rzs_stat64_inc(rzs, &rzs->stats.notify_free);
-}
-
-static const struct block_device_operations ramzswap_devops = {
-	.ioctl = ramzswap_ioctl,
-	.swap_slot_free_notify = ramzswap_slot_free_notify,
-	.owner = THIS_MODULE
-};
-
-static int create_device(struct ramzswap *rzs, int device_id)
-{
-	int ret = 0;
-
-	mutex_init(&rzs->lock);
-	spin_lock_init(&rzs->stat64_lock);
-
-	rzs->queue = blk_alloc_queue(GFP_KERNEL);
-	if (!rzs->queue) {
-		pr_err("Error allocating disk queue for device %d\n",
-			device_id);
-		ret = -ENOMEM;
-		goto out;
-	}
-
-	blk_queue_make_request(rzs->queue, ramzswap_make_request);
-	rzs->queue->queuedata = rzs;
-
-	 /* gendisk structure */
-	rzs->disk = alloc_disk(1);
-	if (!rzs->disk) {
-		blk_cleanup_queue(rzs->queue);
-		pr_warning("Error allocating disk structure for device %d\n",
-			device_id);
-		ret = -ENOMEM;
-		goto out;
-	}
-
-	rzs->disk->major = ramzswap_major;
-	rzs->disk->first_minor = device_id;
-	rzs->disk->fops = &ramzswap_devops;
-	rzs->disk->queue = rzs->queue;
-	rzs->disk->private_data = rzs;
-	snprintf(rzs->disk->disk_name, 16, "ramzswap%d", device_id);
-
-	/* Actual capacity set using RZSIO_SET_DISKSIZE_KB ioctl */
-	set_capacity(rzs->disk, 0);
-
-	/*
-	 * To ensure that we always get PAGE_SIZE aligned
-	 * and n*PAGE_SIZED sized I/O requests.
-	 */
-	blk_queue_physical_block_size(rzs->disk->queue, PAGE_SIZE);
-	blk_queue_logical_block_size(rzs->disk->queue, PAGE_SIZE);
-	blk_queue_io_min(rzs->disk->queue, PAGE_SIZE);
-	blk_queue_io_opt(rzs->disk->queue, PAGE_SIZE);
-
-	add_disk(rzs->disk);
-
-	rzs->init_done = 0;
-
-out:
-	return ret;
-}
-
-static void destroy_device(struct ramzswap *rzs)
-{
-	if (rzs->disk) {
-		del_gendisk(rzs->disk);
-		put_disk(rzs->disk);
-	}
-
-	if (rzs->queue)
-		blk_cleanup_queue(rzs->queue);
-}
-
-static int __init ramzswap_init(void)
-{
-	int ret, dev_id;
-
-	if (num_devices > max_num_devices) {
-		pr_warning("Invalid value for num_devices: %u\n",
-				num_devices);
-		ret = -EINVAL;
-		goto out;
-	}
-
-	ramzswap_major = register_blkdev(0, "ramzswap");
-	if (ramzswap_major <= 0) {
-		pr_warning("Unable to get major number\n");
-		ret = -EBUSY;
-		goto out;
-	}
-
-	if (!num_devices) {
-		pr_info("num_devices not specified. Using default: 1\n");
-		num_devices = 1;
-	}
-
-	/* Allocate the device array and initialize each one */
-	pr_info("Creating %u devices ...\n", num_devices);
-	devices = kzalloc(num_devices * sizeof(struct ramzswap), GFP_KERNEL);
-	if (!devices) {
-		ret = -ENOMEM;
-		goto unregister;
-	}
-
-	for (dev_id = 0; dev_id < num_devices; dev_id++) {
-		ret = create_device(&devices[dev_id], dev_id);
-		if (ret)
-			goto free_devices;
-	}
-
-	return 0;
-
-free_devices:
-	while (dev_id)
-		destroy_device(&devices[--dev_id]);
-unregister:
-	unregister_blkdev(ramzswap_major, "ramzswap");
-out:
-	return ret;
-}
-
-static void __exit ramzswap_exit(void)
-{
-	int i;
-	struct ramzswap *rzs;
-
-	for (i = 0; i < num_devices; i++) {
-		rzs = &devices[i];
-
-		destroy_device(rzs);
-		if (rzs->init_done)
-			reset_device(rzs);
-	}
-
-	unregister_blkdev(ramzswap_major, "ramzswap");
-
-	kfree(devices);
-	pr_debug("Cleanup done!\n");
-}
-
-module_param(num_devices, uint, 0);
-MODULE_PARM_DESC(num_devices, "Number of ramzswap devices");
-
-module_init(ramzswap_init);
-module_exit(ramzswap_exit);
-
-MODULE_LICENSE("Dual BSD/GPL");
-MODULE_AUTHOR("Nitin Gupta <ngupta@vflare.org>");
-MODULE_DESCRIPTION("Compressed RAM Based Swap Device");
diff --git a/drivers/staging/ramzswap/ramzswap_drv.h b/drivers/staging/ramzswap/ramzswap_drv.h
deleted file mode 100644
index ad91726013b..00000000000
--- a/drivers/staging/ramzswap/ramzswap_drv.h
+++ /dev/null
@@ -1,168 +0,0 @@
-/*
- * Compressed RAM based swap device
- *
- * Copyright (C) 2008, 2009, 2010  Nitin Gupta
- *
- * This code is released using a dual license strategy: BSD/GPL
- * You can choose the licence that better fits your requirements.
- *
- * Released under the terms of 3-clause BSD License
- * Released under the terms of GNU General Public License Version 2.0
- *
- * Project home: http://compcache.googlecode.com
- */
-
-#ifndef _RAMZSWAP_DRV_H_
-#define _RAMZSWAP_DRV_H_
-
-#include <linux/spinlock.h>
-#include <linux/mutex.h>
-
-#include "ramzswap_ioctl.h"
-#include "xvmalloc.h"
-
-/*
- * Some arbitrary value. This is just to catch
- * invalid value for num_devices module parameter.
- */
-static const unsigned max_num_devices = 32;
-
-/*
- * Stored at beginning of each compressed object.
- *
- * It stores back-reference to table entry which points to this
- * object. This is required to support memory defragmentation.
- */
-struct zobj_header {
-#if 0
-	u32 table_idx;
-#endif
-};
-
-/*-- Configurable parameters */
-
-/* Default ramzswap disk size: 25% of total RAM */
-static const unsigned default_disksize_perc_ram = 25;
-
-/*
- * Pages that compress to size greater than this are stored
- * uncompressed in memory.
- */
-static const unsigned max_zpage_size = PAGE_SIZE / 4 * 3;
-
-/*
- * NOTE: max_zpage_size must be less than or equal to:
- *   XV_MAX_ALLOC_SIZE - sizeof(struct zobj_header)
- * otherwise, xv_malloc() would always return failure.
- */
-
-/*-- End of configurable params */
-
-#define SECTOR_SHIFT		9
-#define SECTOR_SIZE		(1 << SECTOR_SHIFT)
-#define SECTORS_PER_PAGE_SHIFT	(PAGE_SHIFT - SECTOR_SHIFT)
-#define SECTORS_PER_PAGE	(1 << SECTORS_PER_PAGE_SHIFT)
-
-/* Flags for ramzswap pages (table[page_no].flags) */
-enum rzs_pageflags {
-	/* Page is stored uncompressed */
-	RZS_UNCOMPRESSED,
-
-	/* Page consists entirely of zeros */
-	RZS_ZERO,
-
-	__NR_RZS_PAGEFLAGS,
-};
-
-/*-- Data structures */
-
-/*
- * Allocated for each swap slot, indexed by page no.
- * These table entries must fit exactly in a page.
- */
-struct table {
-	struct page *page;
-	u16 offset;
-	u8 count;	/* object ref count (not yet used) */
-	u8 flags;
-} __attribute__((aligned(4)));
-
-struct ramzswap_stats {
-	/* basic stats */
-	size_t compr_size;	/* compressed size of pages stored -
-				 * needed to enforce memlimit */
-	/* more stats */
-#if defined(CONFIG_RAMZSWAP_STATS)
-	u64 num_reads;		/* failed + successful */
-	u64 num_writes;		/* --do-- */
-	u64 failed_reads;	/* should NEVER! happen */
-	u64 failed_writes;	/* can happen when memory is too low */
-	u64 invalid_io;		/* non-swap I/O requests */
-	u64 notify_free;	/* no. of swap slot free notifications */
-	u32 pages_zero;		/* no. of zero filled pages */
-	u32 pages_stored;	/* no. of pages currently stored */
-	u32 good_compress;	/* % of pages with compression ratio<=50% */
-	u32 pages_expand;	/* % of incompressible pages */
-#endif
-};
-
-struct ramzswap {
-	struct xv_pool *mem_pool;
-	void *compress_workmem;
-	void *compress_buffer;
-	struct table *table;
-	spinlock_t stat64_lock;	/* protect 64-bit stats */
-	struct mutex lock;	/* protect compression buffers against
-				 * concurrent writes */
-	struct request_queue *queue;
-	struct gendisk *disk;
-	int init_done;
-	/*
-	 * This is limit on amount of *uncompressed* worth of data
-	 * we can hold. When backing swap device is provided, it is
-	 * set equal to device size.
-	 */
-	size_t disksize;	/* bytes */
-
-	struct ramzswap_stats stats;
-};
-
-/*-- */
-
-/* Debugging and Stats */
-#if defined(CONFIG_RAMZSWAP_STATS)
-static void rzs_stat_inc(u32 *v)
-{
-	*v = *v + 1;
-}
-
-static void rzs_stat_dec(u32 *v)
-{
-	*v = *v - 1;
-}
-
-static void rzs_stat64_inc(struct ramzswap *rzs, u64 *v)
-{
-	spin_lock(&rzs->stat64_lock);
-	*v = *v + 1;
-	spin_unlock(&rzs->stat64_lock);
-}
-
-static u64 rzs_stat64_read(struct ramzswap *rzs, u64 *v)
-{
-	u64 val;
-
-	spin_lock(&rzs->stat64_lock);
-	val = *v;
-	spin_unlock(&rzs->stat64_lock);
-
-	return val;
-}
-#else
-#define rzs_stat_inc(v)
-#define rzs_stat_dec(v)
-#define rzs_stat64_inc(r, v)
-#define rzs_stat64_read(r, v)
-#endif /* CONFIG_RAMZSWAP_STATS */
-
-#endif
diff --git a/drivers/staging/ramzswap/ramzswap_ioctl.h b/drivers/staging/ramzswap/ramzswap_ioctl.h
deleted file mode 100644
index db94bcb4296..00000000000
--- a/drivers/staging/ramzswap/ramzswap_ioctl.h
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * Compressed RAM based swap device
- *
- * Copyright (C) 2008, 2009, 2010  Nitin Gupta
- *
- * This code is released using a dual license strategy: BSD/GPL
- * You can choose the licence that better fits your requirements.
- *
- * Released under the terms of 3-clause BSD License
- * Released under the terms of GNU General Public License Version 2.0
- *
- * Project home: http://compcache.googlecode.com
- */
-
-#ifndef _RAMZSWAP_IOCTL_H_
-#define _RAMZSWAP_IOCTL_H_
-
-struct ramzswap_ioctl_stats {
-	u64 disksize;		/* user specified or equal to backing swap
-				 * size (if present) */
-	u64 num_reads;		/* failed + successful */
-	u64 num_writes;		/* --do-- */
-	u64 failed_reads;	/* should NEVER! happen */
-	u64 failed_writes;	/* can happen when memory is too low */
-	u64 invalid_io;		/* non-swap I/O requests */
-	u64 notify_free;	/* no. of swap slot free notifications */
-	u32 pages_zero;		/* no. of zero filled pages */
-	u32 good_compress_pct;	/* no. of pages with compression ratio<=50% */
-	u32 pages_expand_pct;	/* no. of incompressible pages */
-	u32 pages_stored;
-	u32 pages_used;
-	u64 orig_data_size;
-	u64 compr_data_size;
-	u64 mem_used_total;
-} __attribute__ ((packed, aligned(4)));
-
-#define RZSIO_SET_DISKSIZE_KB	_IOW('z', 0, size_t)
-#define RZSIO_GET_STATS		_IOR('z', 1, struct ramzswap_ioctl_stats)
-#define RZSIO_INIT		_IO('z', 2)
-#define RZSIO_RESET		_IO('z', 3)
-
-#endif
diff --git a/drivers/staging/ramzswap/xvmalloc.c b/drivers/staging/ramzswap/xvmalloc.c
deleted file mode 100644
index 3fdbb8ada82..00000000000
--- a/drivers/staging/ramzswap/xvmalloc.c
+++ /dev/null
@@ -1,507 +0,0 @@
-/*
- * xvmalloc memory allocator
- *
- * Copyright (C) 2008, 2009, 2010  Nitin Gupta
- *
- * This code is released using a dual license strategy: BSD/GPL
- * You can choose the licence that better fits your requirements.
- *
- * Released under the terms of 3-clause BSD License
- * Released under the terms of GNU General Public License Version 2.0
- */
-
-#include <linux/bitops.h>
-#include <linux/errno.h>
-#include <linux/highmem.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/slab.h>
-
-#include "xvmalloc.h"
-#include "xvmalloc_int.h"
-
-static void stat_inc(u64 *value)
-{
-	*value = *value + 1;
-}
-
-static void stat_dec(u64 *value)
-{
-	*value = *value - 1;
-}
-
-static int test_flag(struct block_header *block, enum blockflags flag)
-{
-	return block->prev & BIT(flag);
-}
-
-static void set_flag(struct block_header *block, enum blockflags flag)
-{
-	block->prev |= BIT(flag);
-}
-
-static void clear_flag(struct block_header *block, enum blockflags flag)
-{
-	block->prev &= ~BIT(flag);
-}
-
-/*
- * Given <page, offset> pair, provide a derefrencable pointer.
- * This is called from xv_malloc/xv_free path, so it
- * needs to be fast.
- */
-static void *get_ptr_atomic(struct page *page, u16 offset, enum km_type type)
-{
-	unsigned char *base;
-
-	base = kmap_atomic(page, type);
-	return base + offset;
-}
-
-static void put_ptr_atomic(void *ptr, enum km_type type)
-{
-	kunmap_atomic(ptr, type);
-}
-
-static u32 get_blockprev(struct block_header *block)
-{
-	return block->prev & PREV_MASK;
-}
-
-static void set_blockprev(struct block_header *block, u16 new_offset)
-{
-	block->prev = new_offset | (block->prev & FLAGS_MASK);
-}
-
-static struct block_header *BLOCK_NEXT(struct block_header *block)
-{
-	return (struct block_header *)
-		((char *)block + block->size + XV_ALIGN);
-}
-
-/*
- * Get index of free list containing blocks of maximum size
- * which is less than or equal to given size.
- */
-static u32 get_index_for_insert(u32 size)
-{
-	if (unlikely(size > XV_MAX_ALLOC_SIZE))
-		size = XV_MAX_ALLOC_SIZE;
-	size &= ~FL_DELTA_MASK;
-	return (size - XV_MIN_ALLOC_SIZE) >> FL_DELTA_SHIFT;
-}
-
-/*
- * Get index of free list having blocks of size greater than
- * or equal to requested size.
- */
-static u32 get_index(u32 size)
-{
-	if (unlikely(size < XV_MIN_ALLOC_SIZE))
-		size = XV_MIN_ALLOC_SIZE;
-	size = ALIGN(size, FL_DELTA);
-	return (size - XV_MIN_ALLOC_SIZE) >> FL_DELTA_SHIFT;
-}
-
-/**
- * find_block - find block of at least given size
- * @pool: memory pool to search from
- * @size: size of block required
- * @page: page containing required block
- * @offset: offset within the page where block is located.
- *
- * Searches two level bitmap to locate block of at least
- * the given size. If such a block is found, it provides
- * <page, offset> to identify this block and returns index
- * in freelist where we found this block.
- * Otherwise, returns 0 and <page, offset> params are not touched.
- */
-static u32 find_block(struct xv_pool *pool, u32 size,
-			struct page **page, u32 *offset)
-{
-	ulong flbitmap, slbitmap;
-	u32 flindex, slindex, slbitstart;
-
-	/* There are no free blocks in this pool */
-	if (!pool->flbitmap)
-		return 0;
-
-	/* Get freelist index correspoding to this size */
-	slindex = get_index(size);
-	slbitmap = pool->slbitmap[slindex / BITS_PER_LONG];
-	slbitstart = slindex % BITS_PER_LONG;
-
-	/*
-	 * If freelist is not empty at this index, we found the
-	 * block - head of this list. This is approximate best-fit match.
-	 */
-	if (test_bit(slbitstart, &slbitmap)) {
-		*page = pool->freelist[slindex].page;
-		*offset = pool->freelist[slindex].offset;
-		return slindex;
-	}
-
-	/*
-	 * No best-fit found. Search a bit further in bitmap for a free block.
-	 * Second level bitmap consists of series of 32-bit chunks. Search
-	 * further in the chunk where we expected a best-fit, starting from
-	 * index location found above.
-	 */
-	slbitstart++;
-	slbitmap >>= slbitstart;
-
-	/* Skip this search if we were already at end of this bitmap chunk */
-	if ((slbitstart != BITS_PER_LONG) && slbitmap) {
-		slindex += __ffs(slbitmap) + 1;
-		*page = pool->freelist[slindex].page;
-		*offset = pool->freelist[slindex].offset;
-		return slindex;
-	}
-
-	/* Now do a full two-level bitmap search to find next nearest fit */
-	flindex = slindex / BITS_PER_LONG;
-
-	flbitmap = (pool->flbitmap) >> (flindex + 1);
-	if (!flbitmap)
-		return 0;
-
-	flindex += __ffs(flbitmap) + 1;
-	slbitmap = pool->slbitmap[flindex];
-	slindex = (flindex * BITS_PER_LONG) + __ffs(slbitmap);
-	*page = pool->freelist[slindex].page;
-	*offset = pool->freelist[slindex].offset;
-
-	return slindex;
-}
-
-/*
- * Insert block at <page, offset> in freelist of given pool.
- * freelist used depends on block size.
- */
-static void insert_block(struct xv_pool *pool, struct page *page, u32 offset,
-			struct block_header *block)
-{
-	u32 flindex, slindex;
-	struct block_header *nextblock;
-
-	slindex = get_index_for_insert(block->size);
-	flindex = slindex / BITS_PER_LONG;
-
-	block->link.prev_page = 0;
-	block->link.prev_offset = 0;
-	block->link.next_page = pool->freelist[slindex].page;
-	block->link.next_offset = pool->freelist[slindex].offset;
-	pool->freelist[slindex].page = page;
-	pool->freelist[slindex].offset = offset;
-
-	if (block->link.next_page) {
-		nextblock = get_ptr_atomic(block->link.next_page,
-					block->link.next_offset, KM_USER1);
-		nextblock->link.prev_page = page;
-		nextblock->link.prev_offset = offset;
-		put_ptr_atomic(nextblock, KM_USER1);
-	}
-
-	__set_bit(slindex % BITS_PER_LONG, &pool->slbitmap[flindex]);
-	__set_bit(flindex, &pool->flbitmap);
-}
-
-/*
- * Remove block from head of freelist. Index 'slindex' identifies the freelist.
- */
-static void remove_block_head(struct xv_pool *pool,
-			struct block_header *block, u32 slindex)
-{
-	struct block_header *tmpblock;
-	u32 flindex = slindex / BITS_PER_LONG;
-
-	pool->freelist[slindex].page = block->link.next_page;
-	pool->freelist[slindex].offset = block->link.next_offset;
-	block->link.prev_page = 0;
-	block->link.prev_offset = 0;
-
-	if (!pool->freelist[slindex].page) {
-		__clear_bit(slindex % BITS_PER_LONG, &pool->slbitmap[flindex]);
-		if (!pool->slbitmap[flindex])
-			__clear_bit(flindex, &pool->flbitmap);
-	} else {
-		/*
-		 * DEBUG ONLY: We need not reinitialize freelist head previous
-		 * pointer to 0 - we never depend on its value. But just for
-		 * sanity, lets do it.
-		 */
-		tmpblock = get_ptr_atomic(pool->freelist[slindex].page,
-				pool->freelist[slindex].offset, KM_USER1);
-		tmpblock->link.prev_page = 0;
-		tmpblock->link.prev_offset = 0;
-		put_ptr_atomic(tmpblock, KM_USER1);
-	}
-}
-
-/*
- * Remove block from freelist. Index 'slindex' identifies the freelist.
- */
-static void remove_block(struct xv_pool *pool, struct page *page, u32 offset,
-			struct block_header *block, u32 slindex)
-{
-	u32 flindex;
-	struct block_header *tmpblock;
-
-	if (pool->freelist[slindex].page == page
-	   && pool->freelist[slindex].offset == offset) {
-		remove_block_head(pool, block, slindex);
-		return;
-	}
-
-	flindex = slindex / BITS_PER_LONG;
-
-	if (block->link.prev_page) {
-		tmpblock = get_ptr_atomic(block->link.prev_page,
-				block->link.prev_offset, KM_USER1);
-		tmpblock->link.next_page = block->link.next_page;
-		tmpblock->link.next_offset = block->link.next_offset;
-		put_ptr_atomic(tmpblock, KM_USER1);
-	}
-
-	if (block->link.next_page) {
-		tmpblock = get_ptr_atomic(block->link.next_page,
-				block->link.next_offset, KM_USER1);
-		tmpblock->link.prev_page = block->link.prev_page;
-		tmpblock->link.prev_offset = block->link.prev_offset;
-		put_ptr_atomic(tmpblock, KM_USER1);
-	}
-}
-
-/*
- * Allocate a page and add it to freelist of given pool.
- */
-static int grow_pool(struct xv_pool *pool, gfp_t flags)
-{
-	struct page *page;
-	struct block_header *block;
-
-	page = alloc_page(flags);
-	if (unlikely(!page))
-		return -ENOMEM;
-
-	stat_inc(&pool->total_pages);
-
-	spin_lock(&pool->lock);
-	block = get_ptr_atomic(page, 0, KM_USER0);
-
-	block->size = PAGE_SIZE - XV_ALIGN;
-	set_flag(block, BLOCK_FREE);
-	clear_flag(block, PREV_FREE);
-	set_blockprev(block, 0);
-
-	insert_block(pool, page, 0, block);
-
-	put_ptr_atomic(block, KM_USER0);
-	spin_unlock(&pool->lock);
-
-	return 0;
-}
-
-/*
- * Create a memory pool. Allocates freelist, bitmaps and other
- * per-pool metadata.
- */
-struct xv_pool *xv_create_pool(void)
-{
-	u32 ovhd_size;
-	struct xv_pool *pool;
-
-	ovhd_size = roundup(sizeof(*pool), PAGE_SIZE);
-	pool = kzalloc(ovhd_size, GFP_KERNEL);
-	if (!pool)
-		return NULL;
-
-	spin_lock_init(&pool->lock);
-
-	return pool;
-}
-
-void xv_destroy_pool(struct xv_pool *pool)
-{
-	kfree(pool);
-}
-
-/**
- * xv_malloc - Allocate block of given size from pool.
- * @pool: pool to allocate from
- * @size: size of block to allocate
- * @page: page no. that holds the object
- * @offset: location of object within page
- *
- * On success, <page, offset> identifies block allocated
- * and 0 is returned. On failure, <page, offset> is set to
- * 0 and -ENOMEM is returned.
- *
- * Allocation requests with size > XV_MAX_ALLOC_SIZE will fail.
- */
-int xv_malloc(struct xv_pool *pool, u32 size, struct page **page,
-		u32 *offset, gfp_t flags)
-{
-	int error;
-	u32 index, tmpsize, origsize, tmpoffset;
-	struct block_header *block, *tmpblock;
-
-	*page = NULL;
-	*offset = 0;
-	origsize = size;
-
-	if (unlikely(!size || size > XV_MAX_ALLOC_SIZE))
-		return -ENOMEM;
-
-	size = ALIGN(size, XV_ALIGN);
-
-	spin_lock(&pool->lock);
-
-	index = find_block(pool, size, page, offset);
-
-	if (!*page) {
-		spin_unlock(&pool->lock);
-		if (flags & GFP_NOWAIT)
-			return -ENOMEM;
-		error = grow_pool(pool, flags);
-		if (unlikely(error))
-			return error;
-
-		spin_lock(&pool->lock);
-		index = find_block(pool, size, page, offset);
-	}
-
-	if (!*page) {
-		spin_unlock(&pool->lock);
-		return -ENOMEM;
-	}
-
-	block = get_ptr_atomic(*page, *offset, KM_USER0);
-
-	remove_block_head(pool, block, index);
-
-	/* Split the block if required */
-	tmpoffset = *offset + size + XV_ALIGN;
-	tmpsize = block->size - size;
-	tmpblock = (struct block_header *)((char *)block + size + XV_ALIGN);
-	if (tmpsize) {
-		tmpblock->size = tmpsize - XV_ALIGN;
-		set_flag(tmpblock, BLOCK_FREE);
-		clear_flag(tmpblock, PREV_FREE);
-
-		set_blockprev(tmpblock, *offset);
-		if (tmpblock->size >= XV_MIN_ALLOC_SIZE)
-			insert_block(pool, *page, tmpoffset, tmpblock);
-
-		if (tmpoffset + XV_ALIGN + tmpblock->size != PAGE_SIZE) {
-			tmpblock = BLOCK_NEXT(tmpblock);
-			set_blockprev(tmpblock, tmpoffset);
-		}
-	} else {
-		/* This block is exact fit */
-		if (tmpoffset != PAGE_SIZE)
-			clear_flag(tmpblock, PREV_FREE);
-	}
-
-	block->size = origsize;
-	clear_flag(block, BLOCK_FREE);
-
-	put_ptr_atomic(block, KM_USER0);
-	spin_unlock(&pool->lock);
-
-	*offset += XV_ALIGN;
-
-	return 0;
-}
-
-/*
- * Free block identified with <page, offset>
- */
-void xv_free(struct xv_pool *pool, struct page *page, u32 offset)
-{
-	void *page_start;
-	struct block_header *block, *tmpblock;
-
-	offset -= XV_ALIGN;
-
-	spin_lock(&pool->lock);
-
-	page_start = get_ptr_atomic(page, 0, KM_USER0);
-	block = (struct block_header *)((char *)page_start + offset);
-
-	/* Catch double free bugs */
-	BUG_ON(test_flag(block, BLOCK_FREE));
-
-	block->size = ALIGN(block->size, XV_ALIGN);
-
-	tmpblock = BLOCK_NEXT(block);
-	if (offset + block->size + XV_ALIGN == PAGE_SIZE)
-		tmpblock = NULL;
-
-	/* Merge next block if its free */
-	if (tmpblock && test_flag(tmpblock, BLOCK_FREE)) {
-		/*
-		 * Blocks smaller than XV_MIN_ALLOC_SIZE
-		 * are not inserted in any free list.
-		 */
-		if (tmpblock->size >= XV_MIN_ALLOC_SIZE) {
-			remove_block(pool, page,
-				    offset + block->size + XV_ALIGN, tmpblock,
-				    get_index_for_insert(tmpblock->size));
-		}
-		block->size += tmpblock->size + XV_ALIGN;
-	}
-
-	/* Merge previous block if its free */
-	if (test_flag(block, PREV_FREE)) {
-		tmpblock = (struct block_header *)((char *)(page_start) +
-						get_blockprev(block));
-		offset = offset - tmpblock->size - XV_ALIGN;
-
-		if (tmpblock->size >= XV_MIN_ALLOC_SIZE)
-			remove_block(pool, page, offset, tmpblock,
-				    get_index_for_insert(tmpblock->size));
-
-		tmpblock->size += block->size + XV_ALIGN;
-		block = tmpblock;
-	}
-
-	/* No used objects in this page. Free it. */
-	if (block->size == PAGE_SIZE - XV_ALIGN) {
-		put_ptr_atomic(page_start, KM_USER0);
-		spin_unlock(&pool->lock);
-
-		__free_page(page);
-		stat_dec(&pool->total_pages);
-		return;
-	}
-
-	set_flag(block, BLOCK_FREE);
-	if (block->size >= XV_MIN_ALLOC_SIZE)
-		insert_block(pool, page, offset, block);
-
-	if (offset + block->size + XV_ALIGN != PAGE_SIZE) {
-		tmpblock = BLOCK_NEXT(block);
-		set_flag(tmpblock, PREV_FREE);
-		set_blockprev(tmpblock, offset);
-	}
-
-	put_ptr_atomic(page_start, KM_USER0);
-	spin_unlock(&pool->lock);
-}
-
-u32 xv_get_object_size(void *obj)
-{
-	struct block_header *blk;
-
-	blk = (struct block_header *)((char *)(obj) - XV_ALIGN);
-	return blk->size;
-}
-
-/*
- * Returns total memory used by allocator (userdata + metadata)
- */
-u64 xv_get_total_size_bytes(struct xv_pool *pool)
-{
-	return pool->total_pages << PAGE_SHIFT;
-}
diff --git a/drivers/staging/ramzswap/xvmalloc.h b/drivers/staging/ramzswap/xvmalloc.h
deleted file mode 100644
index 5b1a81aa5fa..00000000000
--- a/drivers/staging/ramzswap/xvmalloc.h
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * xvmalloc memory allocator
- *
- * Copyright (C) 2008, 2009, 2010  Nitin Gupta
- *
- * This code is released using a dual license strategy: BSD/GPL
- * You can choose the licence that better fits your requirements.
- *
- * Released under the terms of 3-clause BSD License
- * Released under the terms of GNU General Public License Version 2.0
- */
-
-#ifndef _XV_MALLOC_H_
-#define _XV_MALLOC_H_
-
-#include <linux/types.h>
-
-struct xv_pool;
-
-struct xv_pool *xv_create_pool(void);
-void xv_destroy_pool(struct xv_pool *pool);
-
-int xv_malloc(struct xv_pool *pool, u32 size, struct page **page,
-			u32 *offset, gfp_t flags);
-void xv_free(struct xv_pool *pool, struct page *page, u32 offset);
-
-u32 xv_get_object_size(void *obj);
-u64 xv_get_total_size_bytes(struct xv_pool *pool);
-
-#endif
diff --git a/drivers/staging/ramzswap/xvmalloc_int.h b/drivers/staging/ramzswap/xvmalloc_int.h
deleted file mode 100644
index e23ed5c8b8e..00000000000
--- a/drivers/staging/ramzswap/xvmalloc_int.h
+++ /dev/null
@@ -1,86 +0,0 @@
-/*
- * xvmalloc memory allocator
- *
- * Copyright (C) 2008, 2009, 2010  Nitin Gupta
- *
- * This code is released using a dual license strategy: BSD/GPL
- * You can choose the licence that better fits your requirements.
- *
- * Released under the terms of 3-clause BSD License
- * Released under the terms of GNU General Public License Version 2.0
- */
-
-#ifndef _XV_MALLOC_INT_H_
-#define _XV_MALLOC_INT_H_
-
-#include <linux/kernel.h>
-#include <linux/types.h>
-
-/* User configurable params */
-
-/* Must be power of two */
-#define XV_ALIGN_SHIFT	2
-#define XV_ALIGN	(1 << XV_ALIGN_SHIFT)
-#define XV_ALIGN_MASK	(XV_ALIGN - 1)
-
-/* This must be greater than sizeof(link_free) */
-#define XV_MIN_ALLOC_SIZE	32
-#define XV_MAX_ALLOC_SIZE	(PAGE_SIZE - XV_ALIGN)
-
-/* Free lists are separated by FL_DELTA bytes */
-#define FL_DELTA_SHIFT	3
-#define FL_DELTA	(1 << FL_DELTA_SHIFT)
-#define FL_DELTA_MASK	(FL_DELTA - 1)
-#define NUM_FREE_LISTS	((XV_MAX_ALLOC_SIZE - XV_MIN_ALLOC_SIZE) \
-				/ FL_DELTA + 1)
-
-#define MAX_FLI		DIV_ROUND_UP(NUM_FREE_LISTS, BITS_PER_LONG)
-
-/* End of user params */
-
-enum blockflags {
-	BLOCK_FREE,
-	PREV_FREE,
-	__NR_BLOCKFLAGS,
-};
-
-#define FLAGS_MASK	XV_ALIGN_MASK
-#define PREV_MASK	(~FLAGS_MASK)
-
-struct freelist_entry {
-	struct page *page;
-	u16 offset;
-	u16 pad;
-};
-
-struct link_free {
-	struct page *prev_page;
-	struct page *next_page;
-	u16 prev_offset;
-	u16 next_offset;
-};
-
-struct block_header {
-	union {
-		/* This common header must be XV_ALIGN bytes */
-		u8 common[XV_ALIGN];
-		struct {
-			u16 size;
-			u16 prev;
-		};
-	};
-	struct link_free link;
-};
-
-struct xv_pool {
-	ulong flbitmap;
-	ulong slbitmap[MAX_FLI];
-	spinlock_t lock;
-
-	struct freelist_entry freelist[NUM_FREE_LISTS];
-
-	/* stats */
-	u64 total_pages;
-};
-
-#endif