* [PATCH] dma-coherent: switch to bitmap_zalloc() in dma_init_coherent_memory()
@ 2020-05-16 10:09 Yunfeng Ye
2020-07-16 14:47 ` Christoph Hellwig
0 siblings, 1 reply; 2+ messages in thread
From: Yunfeng Ye @ 2020-05-16 10:09 UTC (permalink / raw)
To: Christoph Hellwig, m.szyprowski, robin.murphy, iommu, linux-kernel
Cc: Shiyuan Hu, Hewenliang
Switch to bitmap_zalloc() to show clearly in dma_init_coherent_memory().
No functional change.
Signed-off-by: Yunfeng Ye <yeyunfeng@huawei.com>
---
kernel/dma/coherent.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/kernel/dma/coherent.c b/kernel/dma/coherent.c
index 2a0c4985f38e..794b31e61ca0 100644
--- a/kernel/dma/coherent.c
+++ b/kernel/dma/coherent.c
@@ -44,7 +44,6 @@ static int dma_init_coherent_memory(phys_addr_t phys_addr,
struct dma_coherent_mem *dma_mem = NULL;
void *mem_base = NULL;
int pages = size >> PAGE_SHIFT;
- int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
int ret;
if (!size) {
@@ -62,7 +61,7 @@ static int dma_init_coherent_memory(phys_addr_t phys_addr,
ret = -ENOMEM;
goto out;
}
- dma_mem->bitmap = kzalloc(bitmap_size, GFP_KERNEL);
+ dma_mem->bitmap = bitmap_zalloc(pages, GFP_KERNEL);
if (!dma_mem->bitmap) {
ret = -ENOMEM;
goto out;
@@ -90,7 +89,7 @@ static void dma_release_coherent_memory(struct dma_coherent_mem *mem)
return;
memunmap(mem->virt_base);
- kfree(mem->bitmap);
+ bitmap_free(mem->bitmap);
kfree(mem);
}
--
1.8.3.1
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^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] dma-coherent: switch to bitmap_zalloc() in dma_init_coherent_memory()
2020-05-16 10:09 [PATCH] dma-coherent: switch to bitmap_zalloc() in dma_init_coherent_memory() Yunfeng Ye
@ 2020-07-16 14:47 ` Christoph Hellwig
0 siblings, 0 replies; 2+ messages in thread
From: Christoph Hellwig @ 2020-07-16 14:47 UTC (permalink / raw)
To: Yunfeng Ye
Cc: Hewenliang, Shiyuan Hu, linux-kernel, iommu, robin.murphy,
Christoph Hellwig
Applied to nvme-5.9.
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https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-05-16 10:09 [PATCH] dma-coherent: switch to bitmap_zalloc() in dma_init_coherent_memory() Yunfeng Ye
2020-07-16 14:47 ` Christoph Hellwig
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