Currently the __GFP_ZERO flag is ignored by dma_pool_alloc(). Make dma_pool_alloc() zero the memory if this flag is set. Signed-off-by: Sean O. Stalley <sean.stalley@xxxxxxxxx> --- mm/dmapool.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/mm/dmapool.c b/mm/dmapool.c index fd5fe43..bd49386 100644 --- a/mm/dmapool.c +++ b/mm/dmapool.c @@ -334,7 +334,7 @@ void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, /* pool_alloc_page() might sleep, so temporarily drop &pool->lock */ spin_unlock_irqrestore(&pool->lock, flags); - page = pool_alloc_page(pool, mem_flags); + page = pool_alloc_page(pool, mem_flags & (~__GFP_ZERO)); if (!page) return NULL; @@ -372,9 +372,14 @@ void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, break; } } - memset(retval, POOL_POISON_ALLOCATED, pool->size); + if (!(mem_flags & __GFP_ZERO)) + memset(retval, POOL_POISON_ALLOCATED, pool->size); #endif spin_unlock_irqrestore(&pool->lock, flags); + + if (mem_flags & __GFP_ZERO) + memset(retval, 0, pool->size); + return retval; } EXPORT_SYMBOL(dma_pool_alloc); -- 1.9.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>