The patch titled
Subject: mm: add dma_pool_zalloc() call to DMA API
has been added to the -mm tree. Its filename is
mm-add-dma_pool_zalloc-call-to-dma-api.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-add-dma_pool_zalloc-call-to-dma-api.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-add-dma_pool_zalloc-call-to-dma-api.patch
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------------------------------------------------------
From: "Sean O. Stalley" <sean.stalley@xxxxxxxxx>
Subject: mm: add dma_pool_zalloc() call to DMA API
Add a wrapper function for dma_pool_alloc() to get zeroed memory.
Signed-off-by: Sean O. Stalley <sean.stalley@xxxxxxxxx>
Cc: Vinod Koul <vinod.koul@xxxxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Gilles Muller <Gilles.Muller@xxxxxxx>
Cc: Nicolas Palix <nicolas.palix@xxxxxxx>
Cc: Michal Marek <mmarek@xxxxxxx>
Cc: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/DMA-API.txt | 7 +++++++
include/linux/dmapool.h | 6 ++++++
2 files changed, 13 insertions(+)
diff -puN Documentation/DMA-API.txt~mm-add-dma_pool_zalloc-call-to-dma-api Documentation/DMA-API.txt
--- a/Documentation/DMA-API.txt~mm-add-dma_pool_zalloc-call-to-dma-api
+++ a/Documentation/DMA-API.txt
@@ -104,6 +104,13 @@ crossing restrictions, pass 0 for alloc;
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 -puN include/linux/dmapool.h~mm-add-dma_pool_zalloc-call-to-dma-api include/linux/dmapool.h
--- a/include/linux/dmapool.h~mm-add-dma_pool_zalloc-call-to-dma-api
+++ a/include/linux/dmapool.h
@@ -24,6 +24,12 @@ void dma_pool_destroy(struct dma_pool *p
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);
/*
_
Patches currently in -mm which might be from sean.stalley@xxxxxxxxx are
mm-add-support-for-__gfp_zero-flag-to-dma_pool_alloc.patch
mm-add-dma_pool_zalloc-call-to-dma-api.patch
pci-mm-add-pci_pool_zalloc-call.patch
coccinelle-mm-scripts-coccinelle-api-alloc-pool_zalloc-simplecocci.patch
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