From b753df76e97ea501cdc44c91dbbf99994308c260 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Fri, 7 Jun 2013 00:07:28 +0800 Subject: [PATCH] zram: simplify and optimize dev_to_zram() Simplify and optimize dev_to_zram() without walking the zram_devices array. Change-Id: Ib1ee8afe8fc0596f57c4cc7b8e41a817b405c263 Signed-off-by: Jiang Liu Signed-off-by: Greg Kroah-Hartman --- 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, -- 2.7.4