diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/dmapool.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/mm/dmapool.c b/mm/dmapool.c index 34aaac451a96..b1f0885dda22 100644 --- a/mm/dmapool.c +++ b/mm/dmapool.c @@ -37,6 +37,10 @@ #include <linux/types.h> #include <linux/wait.h> +#if defined(CONFIG_DEBUG_SLAB) || 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(struct dma_pool *pool, gfp_t mem_flags) 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_pool *pool, struct dma_page *page) { 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 *pool, gfp_t mem_flags, 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, void *vaddr, dma_addr_t dma) } offset = vaddr - page->vaddr; -#ifdef CONFIG_DEBUG_SLAB +#ifdef DMAPOOL_DEBUG if ((dma - page->dma) != offset) { if (pool->dev) dev_err(pool->dev, |