+EXPORT_SYMBOL(gen_pool_add_virt);
+
+/**
+ * gen_pool_virt_to_phys - return the physical address of memory
+ * @pool: pool to allocate from
+ * @addr: starting address of memory
+ *
+ * Returns the physical address on success, or -1 on error.
+ */
+phys_addr_t gen_pool_virt_to_phys(struct gen_pool *pool, unsigned long addr)
+{
+ struct list_head *_chunk;
+ struct gen_pool_chunk *chunk;
+
+ read_lock(&pool->lock);
+ list_for_each(_chunk, &pool->chunks) {
+ chunk = list_entry(_chunk, struct gen_pool_chunk, next_chunk);
+
+ if (addr >= chunk->start_addr && addr < chunk->end_addr)
+ return chunk->phys_addr + addr - chunk->start_addr;
+ }
+ read_unlock(&pool->lock);
+
+ return -1;
+}
+EXPORT_SYMBOL(gen_pool_virt_to_phys);