From: Jiang Liu <liuj97@gmail.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Nitin Gupta <ngupta@vflare.org>, Minchan Kim <minchan@kernel.org>,
Jerome Marchand <jmarchan@redhat.com>
Cc: Jiang Liu <jiang.liu@huawei.com>,
devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org
Subject: [PATCH v3 07/10] zram: simplify and optimize dev_to_zram()
Date: Fri, 7 Jun 2013 00:07:28 +0800 [thread overview]
Message-ID: <1370534851-26056-8-git-send-email-jiang.liu@huawei.com> (raw)
In-Reply-To: <1370534851-26056-1-git-send-email-jiang.liu@huawei.com>
Simplify and optimize dev_to_zram() without walking the zram_devices
array.
Signed-off-by: Jiang Liu <jiang.liu@huawei.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 dc76a3d..e239d94 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
next prev parent reply other threads:[~2013-06-06 16:11 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-06 16:07 [PATCH v2 00/10] Bugfixes and minor improvements for zram Jiang Liu
2013-06-06 16:07 ` [PATCH v3 01/10] zram: avoid invalid memory access in zram_exit() Jiang Liu
2013-06-07 7:58 ` Minchan Kim
2013-06-07 9:29 ` Jerome Marchand
2013-06-06 16:07 ` [PATCH v3 02/10] zram: use zram->lock to protect zram_free_page() in swap free notify path Jiang Liu
2013-06-07 8:05 ` Minchan Kim
2013-06-07 9:32 ` Jerome Marchand
2013-06-06 16:07 ` [PATCH v3 03/10] zram: destroy all devices on error recovery path in zram_init() Jiang Liu
2013-06-06 16:07 ` [PATCH v3 04/10] zram: avoid double free in function zram_bvec_write() Jiang Liu
2013-06-07 8:06 ` Minchan Kim
2013-06-06 16:07 ` [PATCH v3 05/10] zram: avoid access beyond the zram device Jiang Liu
2013-06-07 8:09 ` Minchan Kim
2013-06-07 9:40 ` Jerome Marchand
2013-06-07 9:43 ` Jiang Liu
2013-06-06 16:07 ` [PATCH v3 06/10] zram: protect sysfs handler from invalid memory access Jiang Liu
2013-06-07 9:41 ` Jerome Marchand
2013-06-06 16:07 ` Jiang Liu [this message]
2013-06-06 16:07 ` [PATCH v3 08/10] zram: kill unused zram_get_num_devices() Jiang Liu
2013-06-06 16:07 ` [PATCH v3 09/10] zram: optimize memory operations with clear_page()/copy_page() Jiang Liu
2013-06-06 16:07 ` [PATCH v3 10/10] zram: use atomic64_xxx() to replace zram_stat64_xxx() Jiang Liu
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