40 	struct snd_util_memhdr *hdr;  in snd_util_memhdr_new()  local
42 	hdr = kzalloc(sizeof(*hdr), GFP_KERNEL);  in snd_util_memhdr_new()
43 	if (hdr == NULL)  in snd_util_memhdr_new()
45 	hdr->size = memsize;  in snd_util_memhdr_new()
46 	mutex_init(&hdr->block_mutex);  in snd_util_memhdr_new()
47 	INIT_LIST_HEAD(&hdr->block);  in snd_util_memhdr_new()
49 	return hdr;  in snd_util_memhdr_new()
55 void snd_util_memhdr_free(struct snd_util_memhdr *hdr)  in snd_util_memhdr_free()  argument
59 	if (!hdr)  in snd_util_memhdr_free()
62 	while ((p = hdr->block.next) != &hdr->block) {  in snd_util_memhdr_free()
66 	kfree(hdr);  in snd_util_memhdr_free()
73 __snd_util_mem_alloc(struct snd_util_memhdr *hdr, int size)  in __snd_util_mem_alloc()  argument
79 	if (snd_BUG_ON(!hdr || size <= 0))  in __snd_util_mem_alloc()
86 	if (units > hdr->size)  in __snd_util_mem_alloc()
91 	list_for_each(p, &hdr->block) {  in __snd_util_mem_alloc()
97 	if (hdr->size - prev_offset < units)  in __snd_util_mem_alloc()
101 	return __snd_util_memblk_new(hdr, units, p->prev);  in __snd_util_mem_alloc()
110 __snd_util_memblk_new(struct snd_util_memhdr *hdr, unsigned int units,  in __snd_util_memblk_new()  argument
115 	blk = kmalloc(sizeof(struct snd_util_memblk) + hdr->block_extra_size,  in __snd_util_memblk_new()
120 	if (prev == &hdr->block)  in __snd_util_memblk_new()
128 	hdr->nblocks++;  in __snd_util_memblk_new()
129 	hdr->used += units;  in __snd_util_memblk_new()
138 snd_util_mem_alloc(struct snd_util_memhdr *hdr, int size)  in snd_util_mem_alloc()  argument
141 	mutex_lock(&hdr->block_mutex);  in snd_util_mem_alloc()
142 	blk = __snd_util_mem_alloc(hdr, size);  in snd_util_mem_alloc()
143 	mutex_unlock(&hdr->block_mutex);  in snd_util_mem_alloc()
153 __snd_util_mem_free(struct snd_util_memhdr *hdr, struct snd_util_memblk *blk)  in __snd_util_mem_free()  argument
156 	hdr->nblocks--;  in __snd_util_mem_free()
157 	hdr->used -= blk->size;  in __snd_util_mem_free()
164 int snd_util_mem_free(struct snd_util_memhdr *hdr, struct snd_util_memblk *blk)  in snd_util_mem_free()  argument
166 	if (snd_BUG_ON(!hdr || !blk))  in snd_util_mem_free()
169 	mutex_lock(&hdr->block_mutex);  in snd_util_mem_free()
170 	__snd_util_mem_free(hdr, blk);  in snd_util_mem_free()
171 	mutex_unlock(&hdr->block_mutex);  in snd_util_mem_free()
178 int snd_util_mem_avail(struct snd_util_memhdr *hdr)  in snd_util_mem_avail()  argument
181 	mutex_lock(&hdr->block_mutex);  in snd_util_mem_avail()
182 	size = hdr->size - hdr->used;  in snd_util_mem_avail()
183 	mutex_unlock(&hdr->block_mutex);  in snd_util_mem_avail()