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zram: simplify and optimize dev_to_zram()

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Simplify and optimize dev_to_zram() without walking the zram_devices
array.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiang Liu 2013-06-07 00:07:28 +08:00 • committed by Greg Kroah-Hartman
parent 5863e10b44
commit 80de574dca
1 changed files with 2 additions and 11 deletions
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13
drivers/staging/zram/zram_sysfs.c
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@ -30,18 +30,9 @@ static u64 zram_stat64_read(struct zram *zram, u64 *v)
return val; return val;
} }
static struct zram *dev_to_zram(struct device *dev) static inline struct zram *dev_to_zram(struct device *dev)
{ {
int i; return (struct zram *)dev_to_disk(dev)->private_data;
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;
} }
static ssize_t disksize_show(struct device *dev, static ssize_t disksize_show(struct device *dev,