Index: sys/compat/linuxkpi/common/include/linux/dmapool.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/dmapool.h
+++ sys/compat/linuxkpi/common/include/linux/dmapool.h
@@ -41,6 +41,7 @@
 struct dma_pool *linux_dma_pool_create(char *name, struct device *dev,
     size_t size, size_t align, size_t boundary);
 void linux_dma_pool_destroy(struct dma_pool *pool);
+void lkpi_dmam_pool_destroy(struct device *, void *);
 void *linux_dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
     dma_addr_t *handle);
 void linux_dma_pool_free(struct dma_pool *pool, void *vaddr,
@@ -54,6 +55,25 @@
 	return (linux_dma_pool_create(name, dev, size, align, boundary));
 }
 
+static inline struct dma_pool *
+dmam_pool_create(/* const */ char *name, struct device *dev, size_t size,
+    size_t align, size_t boundary)
+{
+	struct dma_pool **pp;
+
+	pp = devres_alloc(lkpi_dmam_pool_destroy, sizeof(*pp), GFP_KERNEL);
+	if (pp == NULL)
+		return (NULL);
+	*pp = linux_dma_pool_create(name, dev, size, align, boundary);
+	if (*pp == NULL) {
+		devres_free(pp);
+		return (NULL);
+	}
+
+	devres_add(dev, pp);
+	return (*pp);
+}
+
 static inline void
 dma_pool_destroy(struct dma_pool *pool)
 {
Index: sys/compat/linuxkpi/common/src/linux_pci.c
===================================================================
--- sys/compat/linuxkpi/common/src/linux_pci.c
+++ sys/compat/linuxkpi/common/src/linux_pci.c
@@ -997,6 +997,16 @@
 	kfree(pool);
 }
 
+void
+lkpi_dmam_pool_destroy(struct device *dev, void *p)
+{
+	struct dma_pool *pool;
+
+	pool = *(struct dma_pool **)p;
+	LINUX_DMA_PCTRIE_RECLAIM(&pool->pool_ptree);
+	linux_dma_pool_destroy(pool);
+}
+
 void *
 linux_dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
     dma_addr_t *handle)