Commit b5ee5bef authored by Andi Kleen's avatar Andi Kleen Committed by Linus Torvalds
Browse files

dmapool: enable debugging for CONFIG_SLUB_DEBUG_ON too 



Previously it was only enabled for CONFIG_DEBUG_SLAB.

Not hooked into the slub runtime debug configuration, so you currently only
get it with CONFIG_SLUB_DEBUG_ON, not plain CONFIG_SLUB_DEBUG

Acked-by: default avatarMatthew Wilcox <willy@linux.intel.com>
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent a43361cf

mm/dmapool.c

+8 −4
Original line number Diff line number Diff line
@@ -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,

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