[PATCH 07/12] dma-direct: lift gfp_t manipulation out of__dma_direct_alloc_pages

From: Christoph Hellwig
Date: Tue Sep 08 2020 - 12:51:03 EST


Move the detailed gfp_t setup from __dma_direct_alloc_pages into the
caller to clean things up a little.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
kernel/dma/direct.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index 1d564bea58571b..12e9f5f75dfe4b 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -108,7 +108,7 @@ static inline bool dma_should_free_from_pool(struct device *dev,
}

static struct page *__dma_direct_alloc_pages(struct device *dev, size_t size,
- gfp_t gfp, unsigned long attrs)
+ gfp_t gfp)
{
int node = dev_to_node(dev);
struct page *page = NULL;
@@ -116,11 +116,6 @@ static struct page *__dma_direct_alloc_pages(struct device *dev, size_t size,

WARN_ON_ONCE(!PAGE_ALIGNED(size));

- if (attrs & DMA_ATTR_NO_WARN)
- gfp |= __GFP_NOWARN;
-
- /* we always manually zero the memory once we are done: */
- gfp &= ~__GFP_ZERO;
gfp |= dma_direct_optimal_gfp_mask(dev, dev->coherent_dma_mask,
&phys_limit);
page = dma_alloc_contiguous(dev, size, gfp);
@@ -164,6 +159,8 @@ void *dma_direct_alloc(struct device *dev, size_t size,
return arch_dma_alloc(dev, size, dma_handle, gfp, attrs);

size = PAGE_ALIGN(size);
+ if (attrs & DMA_ATTR_NO_WARN)
+ gfp |= __GFP_NOWARN;

if (dma_should_alloc_from_pool(dev, gfp, attrs)) {
u64 phys_mask;
@@ -177,7 +174,8 @@ void *dma_direct_alloc(struct device *dev, size_t size,
goto done;
}

- page = __dma_direct_alloc_pages(dev, size, gfp, attrs);
+ /* we always manually zero the memory once we are done */
+ page = __dma_direct_alloc_pages(dev, size, gfp & ~__GFP_ZERO);
if (!page)
return NULL;

--
2.28.0