Enable dmapool debugging for CONFIG_SLUB_DEBUG_ON too

Index: linux/mm/dmapool.c
===================================================================
@@ -37,6 +37,10 @@
 #include <linux/types.h>
 #include <linux/wait.h>
 
+#if defined(CONFIG_SLAB_DEBUG) || defined(CONFIG_SLUB_DEBUG_ON)
+#define DMAPOOL_DEBUG 1
+#endif
+
 struct dma_pool {		/* the pool */
 	struct list_head page_list;
 	spinlock_t lock;

@@ -216,7 +220,7 @@ static struct dma_page *pool_alloc_page(
 	page->vaddr = dma_alloc_coherent(pool->dev, pool->allocation,
 					 &page->dma, mem_flags);
 	if (page->vaddr) {
-#ifdef	CONFIG_DEBUG_SLAB
+#ifdef	DMAPOOL_DEBUG
 		memset(page->vaddr, POOL_POISON_FREED, pool->allocation);
 #endif
 		pool_initialise_page(pool, page);

@@ -239,7 +243,7 @@ static void pool_free_page(struct dma_po
 {
 	dma_addr_t dma = page->dma;
 
-#ifdef	CONFIG_DEBUG_SLAB
+#ifdef	DMAPOOL_DEBUG
 	memset(page->vaddr, POOL_POISON_FREED, pool->allocation);
 #endif
 	dma_free_coherent(pool->dev, pool->allocation, page->vaddr, dma);

@@ -336,7 +340,7 @@ void *dma_pool_alloc(struct dma_pool *po
 	page->offset = *(int *)(page->vaddr + offset);
 	retval = offset + page->vaddr;
 	*handle = offset + page->dma;
-#ifdef	CONFIG_DEBUG_SLAB
+#ifdef	DMAPOOL_DEBUG
 	memset(retval, POOL_POISON_ALLOCATED, pool->size);
 #endif
  done:

@@ -391,7 +395,7 @@ void dma_pool_free(struct dma_pool *pool
 	}
 
 	offset = vaddr - page->vaddr;
-#ifdef	CONFIG_DEBUG_SLAB
+#ifdef	DMAPOOL_DEBUG
 	if ((dma - page->dma) != offset) {
 		if (pool->dev)
 			dev_err(pool->dev,