Add a wrapper function for dma_pool_alloc() to get zeroed memory.
Signed-off-by: Sean O. Stalley <sean.stalley@xxxxxxxxx>
---
Documentation/DMA-API.txt | 7 +++++++
include/linux/dmapool.h | 6 ++++++
2 files changed, 13 insertions(+)
diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt
index 5208840..988f757 100644
--- a/Documentation/DMA-API.txt
+++ b/Documentation/DMA-API.txt
@@ -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);
diff --git a/include/linux/dmapool.h b/include/linux/dmapool.h
index 022e34f..6d8079b 100644
--- a/include/linux/dmapool.h
+++ b/include/linux/dmapool.h
@@ -22,6 +22,12 @@ 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);
/*
--
1.9.1
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