[PATCH 1/3] dmaengine: dmatest: use offset_in_page() macro

[Geliang Tang]

Use offset_in_page() macro instead of open-coding.

Signed-off-by: Geliang Tang <geliangt...@gmail.com>
---
 drivers/dma/dmatest.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 54d581d..d042b2b 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -585,7 +585,7 @@ static int dmatest_func(void *data)
                for (i = 0; i < src_cnt; i++) {
                        void *buf = thread->srcs[i];
                        struct page *pg = virt_to_page(buf);
-                       unsigned pg_off = (unsigned long) buf & ~PAGE_MASK;
+                       unsigned long pg_off = offset_in_page(buf);
 
                        um->addr[i] = dma_map_page(dev->dev, pg, pg_off,
                                                   um->len, DMA_TO_DEVICE);
@@ -605,7 +605,7 @@ static int dmatest_func(void *data)
                for (i = 0; i < dst_cnt; i++) {
                        void *buf = thread->dsts[i];
                        struct page *pg = virt_to_page(buf);
-                       unsigned pg_off = (unsigned long) buf & ~PAGE_MASK;
+                       unsigned long pg_off = offset_in_page(buf);
 
                        dsts[i] = dma_map_page(dev->dev, pg, pg_off, um->len,
                                               DMA_BIDIRECTIONAL);
-- 
2.9.3