From: Muhammad Falak R Wani <falakreyaz@gmail.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] drivers: dma-coherent: use vma_pages().
Date: Sat, 21 May 2016 18:52:57 +0530 [thread overview]
Message-ID: <1463836977-17009-1-git-send-email-falakreyaz@gmail.com> (raw)
Replace explicit computation of vma page count by a call to
vma_pages()
Signed-off-by: Muhammad Falak R Wani <falakreyaz@gmail.com>
---
drivers/base/dma-coherent.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c
index bdf28f7..db122a0 100644
--- a/drivers/base/dma-coherent.c
+++ b/drivers/base/dma-coherent.c
@@ -261,7 +261,7 @@ int dma_mmap_from_coherent(struct device *dev, struct vm_area_struct *vma,
(mem->virt_base + (mem->size << PAGE_SHIFT))) {
unsigned long off = vma->vm_pgoff;
int start = (vaddr - mem->virt_base) >> PAGE_SHIFT;
- int user_count = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
+ int user_count = vma_pages(vma);
int count = size >> PAGE_SHIFT;
*ret = -ENXIO;
--
1.9.1
reply other threads:[~2016-05-21 13:23 UTC|newest]
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