Commit ad82362b authored by Sean O. Stalley's avatar Sean O. Stalley Committed by Linus Torvalds

mm: add dma_pool_zalloc() call to DMA API

Add a wrapper function for dma_pool_alloc() to get zeroed memory.
Signed-off-by: default avatarSean O. Stalley <>
Cc: Vinod Koul <>
Cc: Bjorn Helgaas <>
Cc: Gilles Muller <>
Cc: Nicolas Palix <>
Cc: Michal Marek <>
Cc: Sebastian Andrzej Siewior <>
Cc: Jonathan Corbet <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent fa23f56d
......@@ -104,6 +104,13 @@ crossing restrictions, pass 0 for alloc; passing 4096 says memory allocated
from this pool must not cross 4KByte boundaries.
void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags,
dma_addr_t *handle)
Wraps dma_pool_alloc() and also zeroes the returned memory if the
allocation attempt succeeded.
void *dma_pool_alloc(struct dma_pool *pool, gfp_t gfp_flags,
dma_addr_t *dma_handle);
......@@ -24,6 +24,12 @@ void dma_pool_destroy(struct dma_pool *pool);
void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
dma_addr_t *handle);
static inline void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags,
dma_addr_t *handle)
return dma_pool_alloc(pool, mem_flags | __GFP_ZERO, handle);
void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr);
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