[PATCH] sh: mm: Use dma_zalloc_coherent instead of dma_alloc_coherent + memset

[zhong jiang]

dma_zalloc_coherent has taken the dma_alloc_coherent() and memset() into
account. Therefore, just use dma_zalloc_coherent to replace the open code.

Signed-off-by: zhong jiang <zhongji...@huawei.com>
---
 arch/sh/mm/consistent.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index 792f361..aa4e450 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -52,14 +52,12 @@ int __init platform_resource_setup_memory(struct 
platform_device *pdev,
        if (!memsize)
                return 0;
 
-       buf = dma_alloc_coherent(&pdev->dev, memsize, &dma_handle, GFP_KERNEL);
+       buf = dma_zalloc_coherent(&pdev->dev, memsize, &dma_handle, GFP_KERNEL);
        if (!buf) {
                pr_warning("%s: unable to allocate memory\n", name);
                return -ENOMEM;
        }
 
-       memset(buf, 0, memsize);
-
        r->flags = IORESOURCE_MEM;
        r->start = dma_handle;
        r->end = r->start + memsize - 1;
-- 
1.7.12.4