linux-kernel - [PATCH v2 2/3] zram: change parameter from vaild_io

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Message-Id: <1413190542-23960-3-git-send-email-karam.lee@lge.com>
Date:	Mon, 13 Oct 2014 17:55:41 +0900
From:	karam.lee@....com
To:	minchan@...nel.org, ngupta@...are.org, linux-kernel@...r.kernel.org
Cc:	matthew.r.wilcox@...el.com, jmarchan@...hat.com,
	seungho1.park@....com, "karam.lee" <karam.lee@....com>
Subject: [PATCH v2 2/3] zram: change parameter from vaild_io_request()

From: "karam.lee" <karam.lee@....com>

This patch changes parameter of valid_io_request for common usage.
The purpose of valid_io_request() is to determine if bio request is
valid or not.
This patch use  I/O start address and size instead of a BIO parameter
for common usage.

Signed-off-by: karam.lee <karam.lee@....com>
---
 drivers/block/zram/zram_drv.c |   16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 54da18a..b0c3a20 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -206,19 +206,18 @@ static inline int is_partial_io(struct bio_vec *bvec)
 /*
  * Check if request is within bounds and aligned on zram logical blocks.
  */
-static inline int valid_io_request(struct zram *zram, struct bio *bio)
+static inline int valid_io_request(struct zram *zram,
+		sector_t start, unsigned int size)
 {
-	u64 start, end, bound;
+	u64 end, bound;
 
 	/* unaligned request */
-	if (unlikely(bio->bi_iter.bi_sector &
-		     (ZRAM_SECTOR_PER_LOGICAL_BLOCK - 1)))
+	if (unlikely(start & (ZRAM_SECTOR_PER_LOGICAL_BLOCK - 1)))
 		return 0;
-	if (unlikely(bio->bi_iter.bi_size & (ZRAM_LOGICAL_BLOCK_SIZE - 1)))
+	if (unlikely(size & (ZRAM_LOGICAL_BLOCK_SIZE - 1)))
 		return 0;
 
-	start = bio->bi_iter.bi_sector;
-	end = start + (bio->bi_iter.bi_size >> SECTOR_SHIFT);
+	end = start + (size >> SECTOR_SHIFT);
 	bound = zram->disksize >> SECTOR_SHIFT;
 	/* out of range range */
 	if (unlikely(start >= bound || end > bound || start > end))
@@ -780,7 +779,8 @@ static void zram_make_request(struct request_queue *queue, struct bio *bio)
 	if (unlikely(!init_done(zram)))
 		goto error;
 
-	if (!valid_io_request(zram, bio)) {
+	if (valid_io_request(zram, bio->bi_iter.bi_sector,
+					bio->bi_iter.bi_size)) {
 		atomic64_inc(&zram->stats.invalid_io);
 		goto error;
 	}
-- 
1.7.9.5

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