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 <[email protected]> --- mm/dmapool.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/mm/dmapool.c b/mm/dmapool.c index fd5fe43..449a5d09 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; @@ -375,6 +375,10 @@ void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, 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 _______________________________________________ Cocci mailing list [email protected] https://systeme.lip6.fr/mailman/listinfo/cocci
