From: Sebastian Ott <sebott@linux.vnet.ibm.com>
Date: Thu, 8 Sep 2016 11:37:09 +0000 (+0200)
Subject: s390/pci_dma: remove memset from dma_alloc
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a95aeb2ff4a99dded0cfa4bec4ee61aaeb8b5109;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

s390/pci_dma: remove memset from dma_alloc

Get rid of a useless memset from dma_alloc. Users of dma_alloc who want
zero initialized memory can get it by specifying __GFP_ZERO or use one
of the zalloc variants.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c
index 0c626c1303cb..54590207ae08 100644
--- a/arch/s390/pci/pci_dma.c
+++ b/arch/s390/pci/pci_dma.c
@@ -391,8 +391,6 @@ static void *s390_dma_alloc(struct device *dev, size_t size,
 		return NULL;
 
 	pa = page_to_phys(page);
-	memset((void *) pa, 0, size);
-
 	map = s390_dma_map_pages(dev, page, 0, size, DMA_BIDIRECTIONAL, 0);
 	if (dma_mapping_error(dev, map)) {
 		free_pages(pa, get_order(size));