[linux.git] / fs / jffs2 / malloc.c

/*
 * JFFS2 -- Journalling Flash File System, Version 2.
 *
 * Copyright © 2001-2007 Red Hat, Inc.
 *
 * Created by David Woodhouse <[email protected]>
 *
 * For licensing information, see the file 'LICENCE' in this directory.
 *
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/jffs2.h>
#include "nodelist.h"

/* These are initialised to NULL in the kernel startup code.
   If you're porting to other operating systems, beware */
static struct kmem_cache *full_dnode_slab;
static struct kmem_cache *raw_dirent_slab;
static struct kmem_cache *raw_inode_slab;
static struct kmem_cache *tmp_dnode_info_slab;
static struct kmem_cache *raw_node_ref_slab;
static struct kmem_cache *node_frag_slab;
static struct kmem_cache *inode_cache_slab;
#ifdef CONFIG_JFFS2_FS_XATTR
static struct kmem_cache *xattr_datum_cache;
static struct kmem_cache *xattr_ref_cache;
#endif

int __init jffs2_create_slab_caches(void)
{
	full_dnode_slab = kmem_cache_create("jffs2_full_dnode",
					    sizeof(struct jffs2_full_dnode),
					    0, 0, NULL);
	if (!full_dnode_slab)
		goto err;

	raw_dirent_slab = kmem_cache_create("jffs2_raw_dirent",
					    sizeof(struct jffs2_raw_dirent),
					    0, SLAB_HWCACHE_ALIGN, NULL);
	if (!raw_dirent_slab)
		goto err;

	raw_inode_slab = kmem_cache_create("jffs2_raw_inode",
					   sizeof(struct jffs2_raw_inode),
					   0, SLAB_HWCACHE_ALIGN, NULL);
	if (!raw_inode_slab)
		goto err;

	tmp_dnode_info_slab = kmem_cache_create("jffs2_tmp_dnode",
						sizeof(struct jffs2_tmp_dnode_info),
						0, 0, NULL);
	if (!tmp_dnode_info_slab)
		goto err;

	raw_node_ref_slab = kmem_cache_create("jffs2_refblock",
					      sizeof(struct jffs2_raw_node_ref) * (REFS_PER_BLOCK + 1),
					      0, 0, NULL);
	if (!raw_node_ref_slab)
		goto err;

	node_frag_slab = kmem_cache_create("jffs2_node_frag",
					   sizeof(struct jffs2_node_frag),
					   0, 0, NULL);
	if (!node_frag_slab)
		goto err;

	inode_cache_slab = kmem_cache_create("jffs2_inode_cache",
					     sizeof(struct jffs2_inode_cache),
					     0, 0, NULL);
	if (!inode_cache_slab)
		goto err;

#ifdef CONFIG_JFFS2_FS_XATTR
	xattr_datum_cache = kmem_cache_create("jffs2_xattr_datum",
					     sizeof(struct jffs2_xattr_datum),
					     0, 0, NULL);
	if (!xattr_datum_cache)
		goto err;

	xattr_ref_cache = kmem_cache_create("jffs2_xattr_ref",
					   sizeof(struct jffs2_xattr_ref),
					   0, 0, NULL);
	if (!xattr_ref_cache)
		goto err;
#endif

	return 0;
 err:
	jffs2_destroy_slab_caches();
	return -ENOMEM;
}

void jffs2_destroy_slab_caches(void)
{
	kmem_cache_destroy(full_dnode_slab);
	kmem_cache_destroy(raw_dirent_slab);
	kmem_cache_destroy(raw_inode_slab);
	kmem_cache_destroy(tmp_dnode_info_slab);
	kmem_cache_destroy(raw_node_ref_slab);
	kmem_cache_destroy(node_frag_slab);
	kmem_cache_destroy(inode_cache_slab);
#ifdef CONFIG_JFFS2_FS_XATTR
	kmem_cache_destroy(xattr_datum_cache);
	kmem_cache_destroy(xattr_ref_cache);
#endif
}

struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize)
{
	struct jffs2_full_dirent *ret;
	ret = kmalloc(sizeof(struct jffs2_full_dirent) + namesize, GFP_KERNEL);
	dbg_memalloc("%p\n", ret);
	return ret;
}

void jffs2_free_full_dirent(struct jffs2_full_dirent *x)
{
	dbg_memalloc("%p\n", x);
	kfree(x);
}

struct jffs2_full_dnode *jffs2_alloc_full_dnode(void)
{
	struct jffs2_full_dnode *ret;
	ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL);
	dbg_memalloc("%p\n", ret);
	return ret;
}

void jffs2_free_full_dnode(struct jffs2_full_dnode *x)
{
	dbg_memalloc("%p\n", x);
	kmem_cache_free(full_dnode_slab, x);
}

struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void)
{
	struct jffs2_raw_dirent *ret;
	ret = kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL);
	dbg_memalloc("%p\n", ret);
	return ret;
}

void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x)
{
	dbg_memalloc("%p\n", x);
	kmem_cache_free(raw_dirent_slab, x);
}

struct jffs2_raw_inode *jffs2_alloc_raw_inode(void)
{
	struct jffs2_raw_inode *ret;
	ret = kmem_cache_alloc(raw_inode_slab, GFP_KERNEL);
	dbg_memalloc("%p\n", ret);
	return ret;
}

void jffs2_free_raw_inode(struct jffs2_raw_inode *x)
{
	dbg_memalloc("%p\n", x);
	kmem_cache_free(raw_inode_slab, x);
}

struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void)
{
	struct jffs2_tmp_dnode_info *ret;
	ret = kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL);
	dbg_memalloc("%p\n",
		ret);
	return ret;
}

void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x)
{
	dbg_memalloc("%p\n", x);
	kmem_cache_free(tmp_dnode_info_slab, x);
}

static struct jffs2_raw_node_ref *jffs2_alloc_refblock(void)
{
	struct jffs2_raw_node_ref *ret;

	ret = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL);
	if (ret) {
		int i = 0;
		for (i=0; i < REFS_PER_BLOCK; i++) {
			ret[i].flash_offset = REF_EMPTY_NODE;
			ret[i].next_in_ino = NULL;
		}
		ret[i].flash_offset = REF_LINK_NODE;
		ret[i].next_in_ino = NULL;
	}
	return ret;
}

int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c,
				 struct jffs2_eraseblock *jeb, int nr)
{
	struct jffs2_raw_node_ref **p, *ref;
	int i = nr;

	dbg_memalloc("%d\n", nr);

	p = &jeb->last_node;
	ref = *p;

	dbg_memalloc("Reserving %d refs for block @0x%08x\n", nr, jeb->offset);

	/* If jeb->last_node is really a valid node then skip over it */
	if (ref && ref->flash_offset != REF_EMPTY_NODE)
		ref++;

	while (i) {
		if (!ref) {
			dbg_memalloc("Allocating new refblock linked from %p\n", p);
			ref = *p = jffs2_alloc_refblock();
			if (!ref)
				return -ENOMEM;
		}
		if (ref->flash_offset == REF_LINK_NODE) {
			p = &ref->next_in_ino;
			ref = *p;
			continue;
		}
		i--;
		ref++;
	}
	jeb->allocated_refs = nr;

	dbg_memalloc("Reserved %d refs for block @0x%08x, last_node is %p (%08x,%p)\n",
		  nr, jeb->offset, jeb->last_node, jeb->last_node->flash_offset,
		  jeb->last_node->next_in_ino);

	return 0;
}

void jffs2_free_refblock(struct jffs2_raw_node_ref *x)
{
	dbg_memalloc("%p\n", x);
	kmem_cache_free(raw_node_ref_slab, x);
}

struct jffs2_node_frag *jffs2_alloc_node_frag(void)
{
	struct jffs2_node_frag *ret;
	ret = kmem_cache_alloc(node_frag_slab, GFP_KERNEL);
	dbg_memalloc("%p\n", ret);
	return ret;
}

void jffs2_free_node_frag(struct jffs2_node_frag *x)
{
	dbg_memalloc("%p\n", x);
	kmem_cache_free(node_frag_slab, x);
}

struct jffs2_inode_cache *jffs2_alloc_inode_cache(void)
{
	struct jffs2_inode_cache *ret;
	ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL);
	dbg_memalloc("%p\n", ret);
	return ret;
}

void jffs2_free_inode_cache(struct jffs2_inode_cache *x)
{
	dbg_memalloc("%p\n", x);
	kmem_cache_free(inode_cache_slab, x);
}

#ifdef CONFIG_JFFS2_FS_XATTR
struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void)
{
	struct jffs2_xattr_datum *xd;
	xd = kmem_cache_zalloc(xattr_datum_cache, GFP_KERNEL);
	dbg_memalloc("%p\n", xd);
	if (!xd)
		return NULL;

	xd->class = RAWNODE_CLASS_XATTR_DATUM;
	xd->node = (void *)xd;
	INIT_LIST_HEAD(&xd->xindex);
	return xd;
}

void jffs2_free_xattr_datum(struct jffs2_xattr_datum *xd)
{
	dbg_memalloc("%p\n", xd);
	kmem_cache_free(xattr_datum_cache, xd);
}

struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void)
{
	struct jffs2_xattr_ref *ref;
	ref = kmem_cache_zalloc(xattr_ref_cache, GFP_KERNEL);
	dbg_memalloc("%p\n", ref);
	if (!ref)
		return NULL;

	ref->class = RAWNODE_CLASS_XATTR_REF;
	ref->node = (void *)ref;
	return ref;
}

void jffs2_free_xattr_ref(struct jffs2_xattr_ref *ref)
{
	dbg_memalloc("%p\n", ref);
	kmem_cache_free(xattr_ref_cache, ref);
}
#endif
Commit	Line	Data
1da177e4 LT	1	/*
	2	* JFFS2 -- Journalling Flash File System, Version 2.
	3	*
c00c310e	4	* Copyright © 2001-2007 Red Hat, Inc.
1da177e4 LT	5	*
	6	* Created by David Woodhouse <[email protected]>
	7	*
	8	* For licensing information, see the file 'LICENCE' in this directory.
	9	*
1da177e4 LT	10	*/
1da177e4 LT	11
5a528957 JP	12	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
5a528957 JP	13
1da177e4 LT	14	#include <linux/kernel.h>
	15	#include <linux/slab.h>
	16	#include <linux/init.h>
	17	#include <linux/jffs2.h>
	18	#include "nodelist.h"
	19
1da177e4 LT	20	/* These are initialised to NULL in the kernel startup code.
1da177e4 LT	21	If you're porting to other operating systems, beware */
e18b890b CL	22	static struct kmem_cache *full_dnode_slab;
	23	static struct kmem_cache *raw_dirent_slab;
	24	static struct kmem_cache *raw_inode_slab;
	25	static struct kmem_cache *tmp_dnode_info_slab;
	26	static struct kmem_cache *raw_node_ref_slab;
	27	static struct kmem_cache *node_frag_slab;
	28	static struct kmem_cache *inode_cache_slab;
aa98d7cf	29	#ifdef CONFIG_JFFS2_FS_XATTR
e18b890b CL	30	static struct kmem_cache *xattr_datum_cache;
e18b890b CL	31	static struct kmem_cache *xattr_ref_cache;
aa98d7cf	32	#endif
1da177e4 LT	33
	34	int __init jffs2_create_slab_caches(void)
	35	{
182ec4ee	36	full_dnode_slab = kmem_cache_create("jffs2_full_dnode",
1da177e4	37	sizeof(struct jffs2_full_dnode),
20c2df83	38	0, 0, NULL);
1da177e4 LT	39	if (!full_dnode_slab)
	40	goto err;
	41
	42	raw_dirent_slab = kmem_cache_create("jffs2_raw_dirent",
	43	sizeof(struct jffs2_raw_dirent),
dd799983	44	0, SLAB_HWCACHE_ALIGN, NULL);
1da177e4 LT	45	if (!raw_dirent_slab)
	46	goto err;
	47
	48	raw_inode_slab = kmem_cache_create("jffs2_raw_inode",
	49	sizeof(struct jffs2_raw_inode),
dd799983	50	0, SLAB_HWCACHE_ALIGN, NULL);
1da177e4 LT	51	if (!raw_inode_slab)
	52	goto err;
	53
	54	tmp_dnode_info_slab = kmem_cache_create("jffs2_tmp_dnode",
	55	sizeof(struct jffs2_tmp_dnode_info),
20c2df83	56	0, 0, NULL);
1da177e4 LT	57	if (!tmp_dnode_info_slab)
	58	goto err;
	59
9bfeb691 DW	60	raw_node_ref_slab = kmem_cache_create("jffs2_refblock",
9bfeb691 DW	61	sizeof(struct jffs2_raw_node_ref) * (REFS_PER_BLOCK + 1),
20c2df83	62	0, 0, NULL);
1da177e4 LT	63	if (!raw_node_ref_slab)
	64	goto err;
	65
	66	node_frag_slab = kmem_cache_create("jffs2_node_frag",
	67	sizeof(struct jffs2_node_frag),
20c2df83	68	0, 0, NULL);
1da177e4 LT	69	if (!node_frag_slab)
	70	goto err;
	71
	72	inode_cache_slab = kmem_cache_create("jffs2_inode_cache",
	73	sizeof(struct jffs2_inode_cache),
20c2df83	74	0, 0, NULL);
aa98d7cf KK	75	if (!inode_cache_slab)
	76	goto err;
	77
	78	#ifdef CONFIG_JFFS2_FS_XATTR
	79	xattr_datum_cache = kmem_cache_create("jffs2_xattr_datum",
	80	sizeof(struct jffs2_xattr_datum),
20c2df83	81	0, 0, NULL);
aa98d7cf KK	82	if (!xattr_datum_cache)
	83	goto err;
	84
	85	xattr_ref_cache = kmem_cache_create("jffs2_xattr_ref",
	86	sizeof(struct jffs2_xattr_ref),
20c2df83	87	0, 0, NULL);
aa98d7cf KK	88	if (!xattr_ref_cache)
	89	goto err;
	90	#endif
	91
	92	return 0;
1da177e4 LT	93	err:
	94	jffs2_destroy_slab_caches();
	95	return -ENOMEM;
	96	}
	97
	98	void jffs2_destroy_slab_caches(void)
	99	{
e1305df1 JL	100	kmem_cache_destroy(full_dnode_slab);
	101	kmem_cache_destroy(raw_dirent_slab);
	102	kmem_cache_destroy(raw_inode_slab);
	103	kmem_cache_destroy(tmp_dnode_info_slab);
	104	kmem_cache_destroy(raw_node_ref_slab);
	105	kmem_cache_destroy(node_frag_slab);
	106	kmem_cache_destroy(inode_cache_slab);
aa98d7cf	107	#ifdef CONFIG_JFFS2_FS_XATTR
e1305df1 JL	108	kmem_cache_destroy(xattr_datum_cache);
e1305df1 JL	109	kmem_cache_destroy(xattr_ref_cache);
aa98d7cf	110	#endif
1da177e4 LT	111	}
	112
	113	struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize)
	114	{
f538c96b AB	115	struct jffs2_full_dirent *ret;
f538c96b AB	116	ret = kmalloc(sizeof(struct jffs2_full_dirent) + namesize, GFP_KERNEL);
733802d9	117	dbg_memalloc("%p\n", ret);
f538c96b	118	return ret;
1da177e4 LT	119	}
	120
	121	void jffs2_free_full_dirent(struct jffs2_full_dirent *x)
	122	{
733802d9	123	dbg_memalloc("%p\n", x);
1da177e4 LT	124	kfree(x);
	125	}
	126
	127	struct jffs2_full_dnode *jffs2_alloc_full_dnode(void)
	128	{
f538c96b AB	129	struct jffs2_full_dnode *ret;
f538c96b AB	130	ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL);
733802d9	131	dbg_memalloc("%p\n", ret);
1da177e4 LT	132	return ret;
	133	}
	134
	135	void jffs2_free_full_dnode(struct jffs2_full_dnode *x)
	136	{
733802d9	137	dbg_memalloc("%p\n", x);
1da177e4 LT	138	kmem_cache_free(full_dnode_slab, x);
	139	}
	140
	141	struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void)
	142	{
f538c96b AB	143	struct jffs2_raw_dirent *ret;
f538c96b AB	144	ret = kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL);
733802d9	145	dbg_memalloc("%p\n", ret);
1da177e4 LT	146	return ret;
	147	}
	148
	149	void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x)
	150	{
733802d9	151	dbg_memalloc("%p\n", x);
1da177e4 LT	152	kmem_cache_free(raw_dirent_slab, x);
	153	}
	154
	155	struct jffs2_raw_inode *jffs2_alloc_raw_inode(void)
	156	{
f538c96b AB	157	struct jffs2_raw_inode *ret;
f538c96b AB	158	ret = kmem_cache_alloc(raw_inode_slab, GFP_KERNEL);
733802d9	159	dbg_memalloc("%p\n", ret);
1da177e4 LT	160	return ret;
	161	}
	162
	163	void jffs2_free_raw_inode(struct jffs2_raw_inode *x)
	164	{
733802d9	165	dbg_memalloc("%p\n", x);
1da177e4 LT	166	kmem_cache_free(raw_inode_slab, x);
	167	}
	168
	169	struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void)
	170	{
f538c96b AB	171	struct jffs2_tmp_dnode_info *ret;
f538c96b AB	172	ret = kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL);
733802d9	173	dbg_memalloc("%p\n",
f538c96b	174	ret);
1da177e4 LT	175	return ret;
	176	}
	177
	178	void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x)
	179	{
733802d9	180	dbg_memalloc("%p\n", x);
1da177e4 LT	181	kmem_cache_free(tmp_dnode_info_slab, x);
	182	}
	183
c05d52c7	184	static struct jffs2_raw_node_ref *jffs2_alloc_refblock(void)
9bfeb691 DW	185	{
	186	struct jffs2_raw_node_ref *ret;
	187
	188	ret = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL);
	189	if (ret) {
	190	int i = 0;
	191	for (i=0; i < REFS_PER_BLOCK; i++) {
	192	ret[i].flash_offset = REF_EMPTY_NODE;
	193	ret[i].next_in_ino = NULL;
	194	}
	195	ret[i].flash_offset = REF_LINK_NODE;
	196	ret[i].next_in_ino = NULL;
	197	}
	198	return ret;
	199	}
	200
046b8b98 DW	201	int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c,
046b8b98 DW	202	struct jffs2_eraseblock *jeb, int nr)
2f785402	203	{
9bfeb691 DW	204	struct jffs2_raw_node_ref *p, ref;
9bfeb691 DW	205	int i = nr;
2f785402 DW	206
	207	dbg_memalloc("%d\n", nr);
	208
9bfeb691 DW	209	p = &jeb->last_node;
	210	ref = *p;
	211
	212	dbg_memalloc("Reserving %d refs for block @0x%08x\n", nr, jeb->offset);
	213
	214	/* If jeb->last_node is really a valid node then skip over it */
	215	if (ref && ref->flash_offset != REF_EMPTY_NODE)
	216	ref++;
	217
	218	while (i) {
	219	if (!ref) {
	220	dbg_memalloc("Allocating new refblock linked from %p\n", p);
	221	ref = *p = jffs2_alloc_refblock();
	222	if (!ref)
	223	return -ENOMEM;
	224	}
	225	if (ref->flash_offset == REF_LINK_NODE) {
	226	p = &ref->next_in_ino;
	227	ref = *p;
	228	continue;
	229	}
	230	i--;
	231	ref++;
2f785402	232	}
9bfeb691	233	jeb->allocated_refs = nr;
2f785402	234
9bfeb691 DW	235	dbg_memalloc("Reserved %d refs for block @0x%08x, last_node is %p (%08x,%p)\n",
	236	nr, jeb->offset, jeb->last_node, jeb->last_node->flash_offset,
	237	jeb->last_node->next_in_ino);
	238
	239	return 0;
1da177e4 LT	240	}
1da177e4 LT	241
9bfeb691	242	void jffs2_free_refblock(struct jffs2_raw_node_ref *x)
1da177e4	243	{
733802d9	244	dbg_memalloc("%p\n", x);
1da177e4 LT	245	kmem_cache_free(raw_node_ref_slab, x);
	246	}
	247
	248	struct jffs2_node_frag *jffs2_alloc_node_frag(void)
	249	{
f538c96b AB	250	struct jffs2_node_frag *ret;
f538c96b AB	251	ret = kmem_cache_alloc(node_frag_slab, GFP_KERNEL);
733802d9	252	dbg_memalloc("%p\n", ret);
1da177e4 LT	253	return ret;
	254	}
	255
	256	void jffs2_free_node_frag(struct jffs2_node_frag *x)
	257	{
733802d9	258	dbg_memalloc("%p\n", x);
1da177e4 LT	259	kmem_cache_free(node_frag_slab, x);
	260	}
	261
	262	struct jffs2_inode_cache *jffs2_alloc_inode_cache(void)
	263	{
f538c96b AB	264	struct jffs2_inode_cache *ret;
f538c96b AB	265	ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL);
733802d9	266	dbg_memalloc("%p\n", ret);
1da177e4 LT	267	return ret;
	268	}
	269
	270	void jffs2_free_inode_cache(struct jffs2_inode_cache *x)
	271	{
733802d9	272	dbg_memalloc("%p\n", x);
1da177e4 LT	273	kmem_cache_free(inode_cache_slab, x);
1da177e4 LT	274	}
aa98d7cf KK	275
	276	#ifdef CONFIG_JFFS2_FS_XATTR
	277	struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void)
	278	{
	279	struct jffs2_xattr_datum *xd;
c6d59cdd	280	xd = kmem_cache_zalloc(xattr_datum_cache, GFP_KERNEL);
aa98d7cf	281	dbg_memalloc("%p\n", xd);
2072552c ZZ	282	if (!xd)
2072552c ZZ	283	return NULL;
aa98d7cf	284
aa98d7cf	285	xd->class = RAWNODE_CLASS_XATTR_DATUM;
c9f700f8	286	xd->node = (void *)xd;
aa98d7cf KK	287	INIT_LIST_HEAD(&xd->xindex);
	288	return xd;
	289	}
	290
	291	void jffs2_free_xattr_datum(struct jffs2_xattr_datum *xd)
	292	{
	293	dbg_memalloc("%p\n", xd);
	294	kmem_cache_free(xattr_datum_cache, xd);
	295	}
	296
	297	struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void)
	298	{
	299	struct jffs2_xattr_ref *ref;
c6d59cdd	300	ref = kmem_cache_zalloc(xattr_ref_cache, GFP_KERNEL);
aa98d7cf	301	dbg_memalloc("%p\n", ref);
2072552c ZZ	302	if (!ref)
2072552c ZZ	303	return NULL;
aa98d7cf	304
aa98d7cf	305	ref->class = RAWNODE_CLASS_XATTR_REF;
c9f700f8	306	ref->node = (void *)ref;
aa98d7cf KK	307	return ref;
	308	}
	309
	310	void jffs2_free_xattr_ref(struct jffs2_xattr_ref *ref)
	311	{
	312	dbg_memalloc("%p\n", ref);
	313	kmem_cache_free(xattr_ref_cache, ref);
	314	}
	315	#endif