'dma_mem->bitmap' is a bitmap. So use 'bitmap_zalloc()' to simplify code,
improve the semantic and avoid some open-coded arithmetic in allocator
arguments.
Also change the corresponding 'kfree()' into 'bitmap_free()' to keep
consistency.
Signed-off-by: Christophe JAILLET <christophe.jail...@wanadoo.fr>
---
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 25fc85a7aebe..375fb3c9538d 100644
--- a/kernel/dma/coherent.c
+++ b/kernel/dma/coherent.c
@@ -40,7 +40,6 @@ static struct dma_coherent_mem
*dma_init_coherent_memory(phys_addr_t phys_addr,
{
struct dma_coherent_mem *dma_mem;
int pages = size >> PAGE_SHIFT;
- int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
void *mem_base;
if (!size)
@@ -53,7 +52,7 @@ static struct dma_coherent_mem
*dma_init_coherent_memory(phys_addr_t phys_addr,
dma_mem = kzalloc(sizeof(struct dma_coherent_mem), GFP_KERNEL);
if (!dma_mem)
goto out_unmap_membase;
- dma_mem->bitmap = kzalloc(bitmap_size, GFP_KERNEL);
+ dma_mem->bitmap = bitmap_zalloc(pages, GFP_KERNEL);
if (!dma_mem->bitmap)
goto out_free_dma_mem;
@@ -81,7 +80,7 @@ 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);
}
--
2.30.2
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