lkml.org 
[lkml]   [2017]   [Mar]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] drivers: base: dma-mapping: use nth_page helper
Date
Use nth_page() helper instead of page_to_pfn() and pfn_to_page() to
simplify the code.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
---
drivers/base/dma-mapping.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/base/dma-mapping.c b/drivers/base/dma-mapping.c
index efd71cf..51b7061 100644
--- a/drivers/base/dma-mapping.c
+++ b/drivers/base/dma-mapping.c
@@ -309,14 +309,13 @@ void *dma_common_contiguous_remap(struct page *page, size_t size,
int i;
struct page **pages;
void *ptr;
- unsigned long pfn;

pages = kmalloc(sizeof(struct page *) << get_order(size), GFP_KERNEL);
if (!pages)
return NULL;

- for (i = 0, pfn = page_to_pfn(page); i < (size >> PAGE_SHIFT); i++)
- pages[i] = pfn_to_page(pfn + i);
+ for (i = 0; i < (size >> PAGE_SHIFT); i++)
+ pages[i] = nth_page(page, i);

ptr = dma_common_pages_remap(pages, size, vm_flags, prot, caller);

--
2.9.3
\
 
 \ /
  Last update: 2017-03-24 15:12    [W:0.057 / U:0.692 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site