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 * zsmalloc memory allocator
 *
 * Copyright (C) 2011  Nitin Gupta
 * Copyright (C) 2012, 2013 Minchan Kim
 *
 * This code is released using a dual license strategy: BSD/GPL
 * You can choose the license 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 _ZS_MALLOC_H_
#define _ZS_MALLOC_H_

#include <linux/types.h>

/*
 * zsmalloc mapping modes
 *
 * NOTE: These only make a difference when a mapped object spans pages.
 */
enum zs_mapmode {
	ZS_MM_RW, /* normal read-write mapping */
	ZS_MM_RO, /* read-only (no copy-out at unmap time) */
	ZS_MM_WO /* write-only (no copy-in at map time) */
	/*
	 * NOTE: ZS_MM_WO should only be used for initializing new
	 * (uninitialized) allocations.  Partial writes to already
	 * initialized allocations should use ZS_MM_RW to preserve the
	 * existing data.
	 */
};

struct zs_pool_stats {
	/* How many pages were migrated (freed) */
	atomic_long_t pages_compacted;
};

struct zs_pool;

struct zs_pool *zs_create_pool(const char *name);
void zs_destroy_pool(struct zs_pool *pool);

unsigned long zs_malloc(struct zs_pool *pool, size_t size, gfp_t flags);
void zs_free(struct zs_pool *pool, unsigned long obj);

size_t zs_huge_class_size(struct zs_pool *pool);

void *zs_map_object(struct zs_pool *pool, unsigned long handle,
			enum zs_mapmode mm);
void zs_unmap_object(struct zs_pool *pool, unsigned long handle);

unsigned long zs_get_total_pages(struct zs_pool *pool);
unsigned long zs_compact(struct zs_pool *pool);

unsigned int zs_lookup_class_index(struct zs_pool *pool, unsigned int size);

void zs_pool_stats(struct zs_pool *pool, struct zs_pool_stats *stats);
#endif
     €їВѓuцџѕБА     /* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Persistent Storage - pstore.h
 *
 * Copyright (C) 2010 Intel Corporation <tony.luck@intel.com>
 *
 * This code is the generic layer to export data records from platform
 * level persistent storage via a file system.
 */
#ifndef _LINUX_PSTORE_H
#define _LINUX_PSTORE_H

#include <linux/compiler.h>
#include <linux/errno.h>
#include <linux/kmsg_dump.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/time.h>
#include <linux/types.h>

struct module;

/*
 * pstore record types (see fs/pstore/platform.c for pstore_type_names[])
 * These values may be written to storage (see EFI vars backend), so
 * they are kind of an ABI. Be careful changing the mappings.
 */
enum pstore_type_id {
	/* Frontend storage types */
	PSTORE_TYPE_DMESG	= 0,
	PSTORE_TYPE_MCE		= 1,
	PSTORE_TYPE_CONSOLE	= 2,
	PSTORE_TYPE_FTRACE	= 3,

	/* PPC64-specific partition types */
	PSTORE_TYPE_PPC_RTAS	= 4,
	PSTORE_TYPE_PPC_OF	= 5,
	PSTORE_TYPE_PPC_COMMON	= 6,
	PSTORE_TYPE_PMSG	= 7,
	PSTORE_TYPE_PPC_OPAL	= 8,

	/* End of the list */
	PSTORE_TYPE_MAX
};

const char *pstore_type_to_name(enum pstore_type_id type);
enum pstore_type_id pstore_name_to_type(const char *name);

struct pstore_info;
/**
 * struct pstore_record - details of a pstore record entry
 * @psi:	pstore backend driver information
 * @type:	pstore record type
 * @id:		per-type unique identifier for record
 * @time:	timestamp of the record
 * @buf:	pointer to record contents
 * @size:	size of @buf
 * @ecc_notice_size:
 *		ECC information for @buf
 * @priv:	pointer for backend specific use, will be
 *		kfree()d by the pstore core if non-NULL
 *		when the record is freed.
 *
 * Valid for PSTORE_TYPE_DMESG @type:
 *
 * @count:	Oops count since boot
 * @reason:	kdump reason for notification
 * @part:	position in a multipart record
 * @compressed:	whether the buffer is compressed
 *
 */
struct pstore_record {
	struct pstore_info	*psi;
	enum pstore_type_id	type;
	u64			id;
	struct timespec64	time;
	char			*buf;
	ssize_t			size;
	ssize_t			ecc_notice_size;
	void			*priv;

	int			count;
	enum kmsg_dump_reason	reason;
	unsigned int		part;
	bool			compressed;
};

/**
 * struct pstore_info - backend pstore driver structu