From: Geliang Tang <geliangtang@163.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: Geliang Tang <geliangtang@163.com>,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] bio: use offset_in_page macro
Date: Sat, 21 Nov 2015 17:27:31 +0800 [thread overview]
Message-ID: <1ccc4fce754462616eb26b037cb2f13b1f926b3c.1448097925.git.geliangtang@163.com> (raw)
Use offset_in_page macro instead of (addr & ~PAGE_MASK).
Signed-off-by: Geliang Tang <geliangtang@163.com>
---
block/bio.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/block/bio.c b/block/bio.c
index 4f184d9..dbabd48 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1125,7 +1125,7 @@ struct bio *bio_copy_user_iov(struct request_queue *q,
int i, ret;
int nr_pages = 0;
unsigned int len = iter->count;
- unsigned int offset = map_data ? map_data->offset & ~PAGE_MASK : 0;
+ unsigned int offset = map_data ? offset_in_page(map_data->offset) : 0;
for (i = 0; i < iter->nr_segs; i++) {
unsigned long uaddr;
@@ -1304,7 +1304,7 @@ struct bio *bio_map_user_iov(struct request_queue *q,
goto out_unmap;
}
- offset = uaddr & ~PAGE_MASK;
+ offset = offset_in_page(uaddr);
for (j = cur_page; j < page_limit; j++) {
unsigned int bytes = PAGE_SIZE - offset;
--
2.5.0
next reply other threads:[~2015-11-21 9:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-21 9:27 Geliang Tang [this message]
2015-11-24 3:23 ` [PATCH] bio: use offset_in_page macro Jens Axboe
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