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SubjectRe: [PATCH 2/2] zram: handle mem suffixes in disk size zram_sysfs parameter
On 10/27/2012 09:03 AM, Sergey Senozhatsky wrote:
> zram: handle mem suffixes in disk size zram_sysfs parameter
>
> Use memparse() to allow mem suffixes in disksize sysfs number.
> Examples:
> echo 256K > /sys/block/zram0/disksize
> echo 512M > /sys/block/zram0/disksize
> echo 1G > /sys/block/zram0/disksize
>
> Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
>
> ---
>
> drivers/staging/zram/zram_sysfs.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/staging/zram/zram_sysfs.c b/drivers/staging/zram/zram_sysfs.c
> index edb0ed4..6be318e 100644
> --- a/drivers/staging/zram/zram_sysfs.c
> +++ b/drivers/staging/zram/zram_sysfs.c
> @@ -15,6 +15,7 @@
> #include <linux/device.h>
> #include <linux/genhd.h>
> #include <linux/mm.h>
> +#include <linux/kernel.h>
>
> #include "zram_drv.h"
>
> @@ -54,13 +55,12 @@ static ssize_t disksize_show(struct device *dev,
> static ssize_t disksize_store(struct device *dev,
> struct device_attribute *attr, const char *buf, size_t len)
> {
> - int ret;
> u64 disksize;
> struct zram *zram = dev_to_zram(dev);
>
> - ret = kstrtoull(buf, 10, &disksize);
> - if (ret)
> - return ret;
> + disksize = memparse(buf, NULL);
> + if (disksize < 1)
> + return -EINVAL;
>

or, just: if (!disksize) ...

Thanks,
Nitin




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