zram: simplify and optimize dev_to_zram()
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>
(cherry picked from commit 80de574dca050b734d8413a98a983fba3d06240b)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
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 @@
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,