27 	struct snd_util_memhdr *hdr;  in snd_util_memhdr_new()  local
29 	hdr = kzalloc(sizeof(*hdr), GFP_KERNEL);  in snd_util_memhdr_new()
30 	if (hdr == NULL)  in snd_util_memhdr_new()
32 	hdr->size = memsize;  in snd_util_memhdr_new()
33 	mutex_init(&hdr->block_mutex);  in snd_util_memhdr_new()
34 	INIT_LIST_HEAD(&hdr->block);  in snd_util_memhdr_new()
36 	return hdr;  in snd_util_memhdr_new()
42 void snd_util_memhdr_free(struct snd_util_memhdr *hdr)  in snd_util_memhdr_free()  argument
46 	if (!hdr)  in snd_util_memhdr_free()
49 	while ((p = hdr->block.next) != &hdr->block) {  in snd_util_memhdr_free()
53 	kfree(hdr);  in snd_util_memhdr_free()
60 __snd_util_mem_alloc(struct snd_util_memhdr *hdr, int size)  in __snd_util_mem_alloc()  argument
66 	if (snd_BUG_ON(!hdr || size <= 0))  in __snd_util_mem_alloc()
73 	if (units > hdr->size)  in __snd_util_mem_alloc()
78 	list_for_each(p, &hdr->block) {  in __snd_util_mem_alloc()
84 	if (hdr->size - prev_offset < units)  in __snd_util_mem_alloc()
88 	return __snd_util_memblk_new(hdr, units, p->prev);  in __snd_util_mem_alloc()
97 __snd_util_memblk_new(struct snd_util_memhdr *hdr, unsigned int units,  in __snd_util_memblk_new()  argument
102 	blk = kmalloc(sizeof(struct snd_util_memblk) + hdr->block_extra_size,  in __snd_util_memblk_new()
107 	if (prev == &hdr->block)  in __snd_util_memblk_new()
115 	hdr->nblocks++;  in __snd_util_memblk_new()
116 	hdr->used += units;  in __snd_util_memblk_new()
125 snd_util_mem_alloc(struct snd_util_memhdr *hdr, int size)  in snd_util_mem_alloc()  argument
128 	mutex_lock(&hdr->block_mutex);  in snd_util_mem_alloc()
129 	blk = __snd_util_mem_alloc(hdr, size);  in snd_util_mem_alloc()
130 	mutex_unlock(&hdr->block_mutex);  in snd_util_mem_alloc()
140 __snd_util_mem_free(struct snd_util_memhdr *hdr, struct snd_util_memblk *blk)  in __snd_util_mem_free()  argument
143 	hdr->nblocks--;  in __snd_util_mem_free()
144 	hdr->used -= blk->size;  in __snd_util_mem_free()
151 int snd_util_mem_free(struct snd_util_memhdr *hdr, struct snd_util_memblk *blk)  in snd_util_mem_free()  argument
153 	if (snd_BUG_ON(!hdr || !blk))  in snd_util_mem_free()
156 	mutex_lock(&hdr->block_mutex);  in snd_util_mem_free()
157 	__snd_util_mem_free(hdr, blk);  in snd_util_mem_free()
158 	mutex_unlock(&hdr->block_mutex);  in snd_util_mem_free()
165 int snd_util_mem_avail(struct snd_util_memhdr *hdr)  in snd_util_mem_avail()  argument
168 	mutex_lock(&hdr->block_mutex);  in snd_util_mem_avail()
169 	size = hdr->size - hdr->used;  in snd_util_mem_avail()
170 	mutex_unlock(&hdr->block_mutex);  in snd_util_mem_avail()