Use offset_in_page() macro instead of open-coding.
Signed-off-by: Geliang Tang <geliangtang@xxxxxxxxx>
---
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
--
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