linux-kernel - [RFC PATCH v1 1/8] zram: simplify and optimize zram_to

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Message-Id: <1370274140-26420-2-git-send-email-jiang.liu@huawei.com>
Date:	Mon,  3 Jun 2013 23:42:13 +0800
From:	Jiang Liu <liuj97@...il.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Nitin Gupta <ngupta@...are.org>,
	Minchan Kim <minchan@...nel.org>,
	Jerome Marchand <jmarchan@...hat.com>
Cc:	Yijing Wang <wangyijing@...wei.com>,
	Jiang Liu <jiang.liu@...wei.com>, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: [RFC PATCH v1 1/8] zram: simplify and optimize zram_to_dev()

Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
---
 drivers/staging/zram/zram_sysfs.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/zram/zram_sysfs.c b/drivers/staging/zram/zram_sysfs.c
index e6a929d..8cb7822 100644
--- a/drivers/staging/zram/zram_sysfs.c
+++ b/drivers/staging/zram/zram_sysfs.c
@@ -30,18 +30,9 @@ static u64 zram_stat64_read(struct zram *zram, u64 *v)
 	return val;
 }
 
-static struct zram *dev_to_zram(struct device *dev)
+static inline struct zram *dev_to_zram(struct device *dev)
 {
-	int i;
-	struct zram *zram = NULL;
-
-	for (i = 0; i < zram_get_num_devices(); i++) {
-		zram = &zram_devices[i];
-		if (disk_to_dev(zram->disk) == dev)
-			break;
-	}
-
-	return zram;
+	return (struct zram *)dev_to_disk(dev)->private_data;
 }
 
 static ssize_t disksize_show(struct device *dev,
-- 
1.8.1.2

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