staging: ramster: remove old driver to prep for new base

[V2: rebased to apply to 20120905 staging-next, no other changes]

To prep for moving the ramster codebase on top of the new
redesigned zcache2 codebase, we remove ramster (as well
as its contained diverged v1.1 version of zcache) entirely.

Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 244 deletions

diff --git a/drivers/staging/ramster/tmem.h b/drivers/staging/ramster/tmem.h
deleted file mode 100644
index 47f1918c8314..000000000000
--- a/drivers/staging/ramster/tmem.h
+++ /dev/null
@@ -1,244 +0,0 @@
-/*
- * tmem.h
- *
- * Transcendent memory
- *
- * Copyright (c) 2009-2011, Dan Magenheimer, Oracle Corp.
- */
-
-#ifndef _TMEM_H_
-#define _TMEM_H_
-
-#include <linux/highmem.h>
-#include <linux/hash.h>
-#include <linux/atomic.h>
-
-/*
- * These are pre-defined by the Xen<->Linux ABI
- */
-#define TMEM_PUT_PAGE			4
-#define TMEM_GET_PAGE			5
-#define TMEM_FLUSH_PAGE			6
-#define TMEM_FLUSH_OBJECT		7
-#define TMEM_POOL_PERSIST		1
-#define TMEM_POOL_SHARED		2
-#define TMEM_POOL_PRECOMPRESSED		4
-#define TMEM_POOL_PAGESIZE_SHIFT	4
-#define TMEM_POOL_PAGESIZE_MASK		0xf
-#define TMEM_POOL_RESERVED_BITS		0x00ffff00
-
-/*
- * sentinels have proven very useful for debugging but can be removed
- * or disabled before final merge.
- */
-#define SENTINELS
-#ifdef SENTINELS
-#define DECL_SENTINEL uint32_t sentinel;
-#define SET_SENTINEL(_x, _y) (_x->sentinel = _y##_SENTINEL)
-#define INVERT_SENTINEL(_x, _y) (_x->sentinel = ~_y##_SENTINEL)
-#define ASSERT_SENTINEL(_x, _y) WARN_ON(_x->sentinel != _y##_SENTINEL)
-#define ASSERT_INVERTED_SENTINEL(_x, _y) WARN_ON(_x->sentinel != ~_y##_SENTINEL)
-#else
-#define DECL_SENTINEL
-#define SET_SENTINEL(_x, _y) do { } while (0)
-#define INVERT_SENTINEL(_x, _y) do { } while (0)
-#define ASSERT_SENTINEL(_x, _y) do { } while (0)
-#define ASSERT_INVERTED_SENTINEL(_x, _y) do { } while (0)
-#endif
-
-#define ASSERT_SPINLOCK(_l)	WARN_ON(!spin_is_locked(_l))
-
-/*
- * A pool is the highest-level data structure managed by tmem and
- * usually corresponds to a large independent set of pages such as
- * a filesystem.  Each pool has an id, and certain attributes and counters.
- * It also contains a set of hash buckets, each of which contains an rbtree
- * of objects and a lock to manage concurrency within the pool.
- */
-
-#define TMEM_HASH_BUCKET_BITS	8
-#define TMEM_HASH_BUCKETS	(1<<TMEM_HASH_BUCKET_BITS)
-
-struct tmem_hashbucket {
-	struct rb_root obj_rb_root;
-	spinlock_t lock;
-};
-
-struct tmem_pool {
-	void *client; /* "up" for some clients, avoids table lookup */
-	struct list_head pool_list;
-	uint32_t pool_id;
-	bool persistent;
-	bool shared;
-	atomic_t obj_count;
-	atomic_t refcount;
-	struct tmem_hashbucket hashbucket[TMEM_HASH_BUCKETS];
-	DECL_SENTINEL
-};
-
-#define is_persistent(_p)  (_p->persistent)
-#define is_ephemeral(_p)   (!(_p->persistent))
-
-/*
- * An object id ("oid") is large: 192-bits (to ensure, for example, files
- * in a modern filesystem can be uniquely identified).
- */
-
-struct tmem_oid {
-	uint64_t oid[3];
-};
-
-struct tmem_xhandle {
-	uint8_t client_id;
-	uint8_t xh_data_cksum;
-	uint16_t xh_data_size;
-	uint16_t pool_id;
-	struct tmem_oid oid;
-	uint32_t index;
-	void *extra;
-};
-
-static inline struct tmem_xhandle tmem_xhandle_fill(uint16_t client_id,
-					struct tmem_pool *pool,
-					struct tmem_oid *oidp,
-					uint32_t index)
-{
-	struct tmem_xhandle xh;
-	xh.client_id = client_id;
-	xh.xh_data_cksum = (uint8_t)-1;
-	xh.xh_data_size = (uint16_t)-1;
-	xh.pool_id = pool->pool_id;
-	xh.oid = *oidp;
-	xh.index = index;
-	return xh;
-}
-
-static inline void tmem_oid_set_invalid(struct tmem_oid *oidp)
-{
-	oidp->oid[0] = oidp->oid[1] = oidp->oid[2] = -1UL;
-}
-
-static inline bool tmem_oid_valid(struct tmem_oid *oidp)
-{
-	return oidp->oid[0] != -1UL || oidp->oid[1] != -1UL ||
-		oidp->oid[2] != -1UL;
-}
-
-static inline int tmem_oid_compare(struct tmem_oid *left,
-					struct tmem_oid *right)
-{
-	int ret;
-
-	if (left->oid[2] == right->oid[2]) {
-		if (left->oid[1] == right->oid[1]) {
-			if (left->oid[0] == right->oid[0])
-				ret = 0;
-			else if (left->oid[0] < right->oid[0])
-				ret = -1;
-			else
-				return 1;
-		} else if (left->oid[1] < right->oid[1])
-			ret = -1;
-		else
-			ret = 1;
-	} else if (left->oid[2] < right->oid[2])
-		ret = -1;
-	else
-		ret = 1;
-	return ret;
-}
-
-static inline unsigned tmem_oid_hash(struct tmem_oid *oidp)
-{
-	return hash_long(oidp->oid[0] ^ oidp->oid[1] ^ oidp->oid[2],
-				TMEM_HASH_BUCKET_BITS);
-}
-
-/*
- * A tmem_obj contains an identifier (oid), pointers to the parent
- * pool and the rb_tree to which it belongs, counters, and an ordered
- * set of pampds, structured in a radix-tree-like tree.  The intermediate
- * nodes of the tree are called tmem_objnodes.
- */
-
-struct tmem_objnode;
-
-struct tmem_obj {
-	struct tmem_oid oid;
-	struct tmem_pool *pool;
-	struct rb_node rb_tree_node;
-	struct tmem_objnode *objnode_tree_root;
-	unsigned int objnode_tree_height;
-	unsigned long objnode_count;
-	long pampd_count;
-	/* for current design of ramster, all pages belonging to
-	 * an object reside on the same remotenode and extra is
-	 * used to record the number of the remotenode so a
-	 * flush-object operation can specify it */
-	void *extra; /* for use by pampd implementation */
-	DECL_SENTINEL
-};
-
-#define OBJNODE_TREE_MAP_SHIFT 6
-#define OBJNODE_TREE_MAP_SIZE (1UL << OBJNODE_TREE_MAP_SHIFT)
-#define OBJNODE_TREE_MAP_MASK (OBJNODE_TREE_MAP_SIZE-1)
-#define OBJNODE_TREE_INDEX_BITS (8 /* CHAR_BIT */ * sizeof(unsigned long))
-#define OBJNODE_TREE_MAX_PATH \
-		(OBJNODE_TREE_INDEX_BITS/OBJNODE_TREE_MAP_SHIFT + 2)
-
-struct tmem_objnode {
-	struct tmem_obj *obj;
-	DECL_SENTINEL
-	void *slots[OBJNODE_TREE_MAP_SIZE];
-	unsigned int slots_in_use;
-};
-
-/* pampd abstract datatype methods provided by the PAM implementation */
-struct tmem_pamops {
-	void *(*create)(char *, size_t, bool, int,
-			struct tmem_pool *, struct tmem_oid *, uint32_t);
-	int (*get_data)(char *, size_t *, bool, void *, struct tmem_pool *,
-				struct tmem_oid *, uint32_t);
-	int (*get_data_and_free)(char *, size_t *, bool, void *,
-				struct tmem_pool *, struct tmem_oid *,
-				uint32_t);
-	void (*free)(void *, struct tmem_pool *,
-				struct tmem_oid *, uint32_t, bool);
-	void (*free_obj)(struct tmem_pool *, struct tmem_obj *);
-	bool (*is_remote)(void *);
-	void *(*repatriate_preload)(void *, struct tmem_pool *,
-					struct tmem_oid *, uint32_t, bool *);
-	int (*repatriate)(void *, void *, struct tmem_pool *,
-				struct tmem_oid *, uint32_t, bool, void *);
-	void (*new_obj)(struct tmem_obj *);
-	int (*replace_in_obj)(void *, struct tmem_obj *);
-};
-extern void tmem_register_pamops(struct tmem_pamops *m);
-
-/* memory allocation methods provided by the host implementation */
-struct tmem_hostops {
-	struct tmem_obj *(*obj_alloc)(struct tmem_pool *);
-	void (*obj_free)(struct tmem_obj *, struct tmem_pool *);
-	struct tmem_objnode *(*objnode_alloc)(struct tmem_pool *);
-	void (*objnode_free)(struct tmem_objnode *, struct tmem_pool *);
-};
-extern void tmem_register_hostops(struct tmem_hostops *m);
-
-/* core tmem accessor functions */
-extern int tmem_put(struct tmem_pool *, struct tmem_oid *, uint32_t index,
-			char *, size_t, bool, int);
-extern int tmem_get(struct tmem_pool *, struct tmem_oid *, uint32_t index,
-			char *, size_t *, bool, int);
-extern int tmem_replace(struct tmem_pool *, struct tmem_oid *, uint32_t index,
-			void *);
-extern void *tmem_localify_get_pampd(struct tmem_pool *, struct tmem_oid *,
-				   uint32_t index, struct tmem_obj **,
-				   void **);
-extern void tmem_localify_finish(struct tmem_obj *, uint32_t index,
-				 void *, void *, bool);
-extern int tmem_flush_page(struct tmem_pool *, struct tmem_oid *,
-			uint32_t index);
-extern int tmem_flush_object(struct tmem_pool *, struct tmem_oid *);
-extern int tmem_destroy_pool(struct tmem_pool *);
-extern void tmem_new_pool(struct tmem_pool *, uint32_t);
-#endif /* _TMEM_H */